Mitch Ahrenstorff

AMSAT News Service

ANS-341
December 7, 2025

In this edition:

* KSLV-II Mission Deploys 13 Satellites, Including New Amateur Radio Payloads
* ISS Deployment Added Five New Education-Focused Amateur Radio Missions
* ARISS Moves Series 30 SSTV Transmissions to RS-38S After Equipment Issue
* GridMasterMap Satellite Top 100 Rovers December 2025 Rankings
* Changes to AMSAT-NA TLE Distribution for December 5, 2025
* ARISS News
* AMSAT Ambassador Activities
* Satellite Shorts From All Over

The AMSAT® News Service bulletins are a free, weekly news and information service of AMSAT, The Radio Amateur Satellite Corporation. ANS publishes news related to Amateur Radio in Space including reports on the activities of a worldwide group of Amateur Radio operators who share an active interest in designing, building, launching and communicating through analog and digital Amateur Radio satellites.

The news feed on https://www.amsat.org publishes news of Amateur Radio in Space as soon as our volunteers can post it.

Please send any amateur satellite news or reports to: ans-editor [at] amsat.org

You can sign up for free e-mail delivery of the AMSAT News Service Bulletins via the ANS List; to join this list see: https://mailman.amsat.org/postorius/lists/ans.amsat.org/

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KSLV-II Mission Deploys 13 Satellites, Including New Amateur Radio Payloads

South Korea recorded another significant achievement in its growing domestic space program with the successful nighttime launch of the Korea Space Launch Vehicle-II (KSLV-II), also known as Nuri, from the Naro Space Center in Goheung, South Korea. Liftoff occurred at 16:13 UTC on 26 November 2025 after a brief delay caused by an abnormal pressure-sensor signal in the rocket’s umbilical system. After the anomaly was resolved, Nuri ascended smoothly and became South Korea’s first orbital launch conducted during nighttime operations.

The vehicle performed nominally throughout ascent, completing stage separations on schedule and surpassing the 500 km mark roughly seven minutes after liftoff. Orbit insertion occurred approximately twelve minutes into the flight, followed one minute later by the deployment of CAS500-3, a 500-kilogram scientific satellite designed for highly light-sensitive Earth-observation missions. Korea Aerospace Administration (KASA) officials confirmed multiple ground-station contacts with CAS500-3 during its first day on orbit, including passes over the King Sejong Station in Antarctica.

Following the primary payload, Nuri deployed twelve CubeSats, nine of which operate in the amateur UHF bands. Of these, three satellites were fully IARU-coordinated. The twin SNUGLITE-III CubeSats—HANA (436.460 MHz) and DURI (436.788 MHz)—developed by Seoul National University, each carry a 9600-bps GMSK AX.25 digipeater, UHF beacons, and an S-band imaging payload at 2405.000 MHz. These spacecraft support amateur-radio training, GPS-RO technology demonstrations, and formation-flying experiments. The third coordinated payload, SPIRONE (436.650 MHz / 2425.100 MHz) from Sejong University, combines an environmental mission to detect marine plastic with a GMSK beacon and an S-band transponder intended for amateur-radio experimentation.

Six additional CubeSats on the mission also used amateur-band downlinks but were not coordinated through the IARU. These include JACK-003, JACK-004 (both 436.300 MHz), BEE-1000 (436.500 MHz), PERSAT01 (437.125 MHz), K-HERO (437.165 MHz), and INHA-RoSAT (437.665 MHz). While uncoordinated, they remain of interest to amateur-radio satellite observers, particularly during early beacon activity and commissioning efforts as teams work to establish first contact.

This launch also reflects South Korea’s broader strategy of strengthening its commercial aerospace ecosystem. For the first time, primary launch-operation responsibility was handled by Hanwha Aerospace, marking a transition toward greater private-sector involvement in national space access. Despite a two-and-a-half-year gap since the previous Nuri flight, Hanwha and its partners maintained launch readiness and executed the mission successfully—an encouraging sign for Korea’s long-term space-industry development.

KASA plans at least two additional Nuri launches through 2027, with the goal of supporting annual flights thereafter and ultimately developing a next-generation booster capable of heavier payloads and deep-space missions. For the amateur-satellite community worldwide, the KSLV-II program’s demonstrated ability to deploy large numbers of small spacecraft—including coordinated amateur payloads—is a promising development, expanding future rideshare opportunities and adding new signals to monitor across UHF and S-band.

Read the full article at: https://www.koreaherald.com/article/10624440 and Libre Space discussion at: https://community.libre.space/t/kslv-2-cas500-3-mission-2025-11-26-16-13-utc/14043

[ANS thanks Kan Hyeong-woo, The Korea Herald, and the Libre Space community, for the above information]

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ISS Deployment Added Five New Education-Focused Amateur Radio Missions

Seven satellites were deployed from the International Space Station on December 2, 2025, with release times spanning 08:10 UTC to 09:50 UTC in three batches using the Voyager Space NanoRacks CubeSat Deployer (NRCSD) system. Five of the deployed spacecraft—SilverSat, RHOK-SAT, Content-Cube, EagleSat-2, and Foras Promineo—operate on amateur radio frequencies and represent a broad collection of university, student-led, and educational missions. SatNOGS stations scheduled more than 700 observations during the first 24 hours as the satellites drifted away from the ISS to form their initial orbits, requiring careful Doppler evaluation and coordinated tracking during the early identification phase.

The first release at 08:10 UTC deployed the 6U DUPLEX satellite, which does not carry an amateur-radio payload. A second deployment window at 08:20 UTC released four 1U spacecraft: SilverSat, RHOK-SAT, Content-Cube, and CU-Alpha. Of these, CU-Alpha operates outside the amateur bands using LoRa at 915 MHz. The final release at 09:50 UTC deployed the two 3U amateur missions, EagleSat-2 and Foras Promineo, completing the NRCSD-29 sequence.

SilverSat, a 1U open-source CubeSat designed to inspire student interest in space science and engineering, was the first amateur satellite from NRCSD-29 to be positively heard on orbit. The spacecraft automatically relays images and telemetry to its ground network, which posts them to social-media platforms whenever a pass is received. European stations reported early carrier traces shortly after deployment, and the first confirmed CW beacon—sent at 16 WPM under the callsign “WP2XGW”—was received at approximately 14:46 UTC. SilverSat uses a UHF turnstile antenna oriented perpendicular to its magnetically stabilized axis, producing LHCP reception for most northern observers.

The 08:20 UTC deployment batch also included RHOK-SAT, Content-Cube, and a 1U CubeSat from Cornell University carrying a brief-duration light-sail experiment designed by students at the Space Systems Design Studio. The sail will be released during a later activation sequence following the CubeSat’s deployment and carries several ChipSat flight computers intended to transmit LoRa telemetry in the 70 cm amateur band during a short operational period. Because the timing of the sail’s release depends on mission conditions, additional details about the project and its ChipSat technology are available at alphacubesat.cornell.edu. Telemetry downlinks for this group include 435.425 MHz for RHOK-SAT (9600 FSK), 437.020 MHz for Content-Cube (9600 GMSK), and 437.400 MHz for the ChipSats, which may remain active only for hours to a few days before re-entry.

The two 3U satellites, EagleSat-2 and Foras Promineo, completed the deployments at 09:50 UTC. EagleSat-2, developed by undergraduate students at Embry-Riddle Aeronautical University, carries two scientific experiments: the Cosmic Ray Payload, designed to track high-energy particle interactions across three observation phases, and the Memory Degradation Experiment, which compares radiation-induced error rates in several CMOS memory technologies. EagleSat-2 transmits on 437.165 MHz using 19k2 2-GFSK. Foras Promineo supports a public-outreach mission based on an interactive robotic-arm game that operates autonomously or under real-time command during ground passes, transmitting LoRa telemetry on 437.400 MHz.

As of the first day of operations, SatNOGS contributors reported active tracking of all five amateur satellites using preliminary TLEs derived from ISS deployment vectors. With the objects initially clustered closely together, early identification required coordinated Doppler measurements and community-supported observation campaigns. As tracking continues to refine and the satellites separate further, operators can expect more reliable beacon reception and additional opportunities for amateur participation as the missions begin their operational phases.

Read the NRCSD29 ISS Satellites Deployment Libre Space discussion at: https://community.libre.space/t/nrcsd29-iss-satellites-deployment-2025-12-02-08-28-utc/14045

[ANS thanks AMSAT-Francophone and the Libre Space community for the above information]

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Only 3 Weeks Left to Get Your Coin!
Celebrate the 40th Anniversary of Amateur Radio on Human Spaceflight
Help Support GOLF and FoxPlus.

Annual memberships start at only $120
Join the AMSAT President’s Club today and help
Keep Amateur Radio in Space!
https://www.amsat.org/join-the-amsat-presidents-club/

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ARISS Moves Series 30 SSTV Transmissions to RS-38S After Equipment Issue

Amateur Radio on the International Space Station (ARISS) has released final scheduling details for the Series 30 Slow-Scan Television retransmission event, which will take place using the RS-38S satellite rather than the ISS. Transmissions are scheduled to begin on 5 December at 00:01 UTC (4 December at 7:01 PM ET) and continue through 13 December at 23:59 UTC. The images will be broadcast from RS-38S, also known as VIZARD-meteo and listed under NORAD 57189, on a downlink of 437.825 MHz with normal Doppler adjustments. Each image will be sent in Robot 36 mode for approximately 36 seconds, followed by a silence period of two to three minutes. Operators may upload their received images to the ARISS SSTV gallery to obtain a new Series 30-1 certificate tailored for the RS-38S event. The satellite can be monitored on amsat.org/status under its VIZARD-meteo entry, and pass-prediction tools are available at amsat.org/pass-prediction for those planning reception attempts.

The RS-38S retransmission provides amateurs an opportunity to receive all 12 Series 30 images after the ISS-based event in November was interrupted by a hardware issue. ARISS announced on 29 November that the RS-38S spacecraft would transmit the same Series 30 imagery during the period of 5–13 December, offering a complete replacement opportunity. This announcement was well received by participants who were unable to capture images during the short ISS transmission window on 12 November. As with previous SSTV events, stations may submit their best frames to the ARISS gallery and request corresponding certificates. The retransmission preserves the commemorative nature of Series 30 while operating entirely independent of ISS hardware. ARISS encourages operators worldwide to monitor its official channels for updates throughout the event period.

The satellite-based activity follows a series of technical difficulties that prevented completion of the original Series 30 event aboard the International Space Station. The ISS transmissions began on 12 November with approximately two hours of successful downlink activity, during which several stations worldwide decoded and uploaded clean images. Soon afterward, SSTV activity on 145.800 MHz FM abruptly stopped, prompting ARISS to acknowledge the outage and begin checking the system status with operations teams on the ground. Crew schedules and limited immediate access to the Service Module hardware initially slowed the troubleshooting process. Operators monitored the downlink throughout the day, but no additional frames were received. ARISS provided real-time updates confirming the outage and advising listeners that further checks were underway.

By 15 November, ARISS reported that the SSTV system had remained offline since the initial interruption and that ongoing solar activity added complexity to assessments of the Service Module equipment. U.S. teams awaited additional information, and only the early decodes from the opening hours of the event appeared in the official SSTV gallery. ARISS thanked operators for their continued patience and reminded them that certificates would still be issued for the initial images. Amateur radio stations worldwide continued to submit signal reports and monitor each ISS pass in hopes of renewed activity. Despite broad interest, no additional transmissions were detected. ARISS stated it would continue providing updates as new information became available.

On 16 November, after three days of analysis, ARISS confirmed that the ISS-based Series 30 event could not continue. The Kenwood D710GA transceiver in the Zvezda Service Module, which supports SSTV operations, appeared to have failed and was taken offline for further review. ARISS reported that the radio functioned normally for approximately two hours before the issue occurred, ending downlink activity for the remainder of the planned 12–20 November window. Operators who received images early in the event were encouraged to upload their frames before the submission deadline to qualify for Series 30 certificates. ARISS emphasized that those certificates would still be honored despite the shortened schedule. No additional transmissions were expected until testing of the affected hardware could be completed.

A follow-on update on 21 November clarified the status of the Service Module radio system. ARISS reported that the faulty Kenwood D710GA had been replaced with the onboard spare Kenwood D710E, which is now supporting scheduled Russian school contacts and required backup communications. Additional in-orbit testing of the original D710GA is planned to determine the cause of the failure and evaluate when APRS or SSTV capabilities might be restored. ARISS also confirmed that the Columbus module radio systems, including the cross-band FM repeater and HamTV equipment, continue to operate normally. Restoration of SSTV service from the ISS will depend on the results of continued hardware assessments. Until those evaluations are complete, ISS-based SSTV remains offline, and the RS-38S retransmission provides the primary means for operators to receive the full Series 30 imagery.

[ANS thanks Amateur Radio on the International Space Station (ARISS) for the above information]

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GridMasterMap Satellite Top 100 Rovers December 2025 Rankings

The December 2025 rankings for the Top 100 Rovers (Mixed LEO/MEO/GEO) in satellite operations, as determined by @GridMasterMap on Twitter, has been released. The ranking is determined by the number of grids and DXCC entities activated, taking into account only those grids where a minimum number of QSOs logged on the gridmaster.fr website have been validated by a third party. Grid numbers do not directly reflect the exact number of activations. Satellite operators are encouraged to upload their LoTW satellite contacts to https://gridmaster.fr in order to provide more accurate data.

Updated: 2025-12-02

1	ND9M	26	KX9X	51	KE0PBR	76	SP5XSD
2	NJ7H	27	KG5CCI	52	WD5GRW	77	DL4EA
3	UT1FG	28	DJ8MS	53	XE3DX	78	N6UTC
4	JA9KRO	29	N5BO	54	W7WGC	79	N4UFO
5	N5UC	30	ON4AUC	55	LU4JVE	80	VE7PTN
6	F5VMJ	31	K8BL	56	JK2XXK	81	PT2AP
7	DL6AP	32	KE4AL	57	PR8KW	82	VE1VOX
8	WI7P	33	KB5FHK	58	EB1AO	83	AA8CH
9	K5ZM	34	AC0RA	59	XE1ET	84	KB2YSI
10	DP0POL	35	PA3GAN	60	EA4NF	85	KI7UXT
11	OE3SEU	36	KI0KB	61	N6DNM	86	AF5CC
12	WY7AA	37	F4BKV	62	W8LR	87	KJ7NDY
13	N6UA	38	KI7UNJ	63	W1AW	88	BI1MHK
14	HA3FOK	39	VA3VGR	64	KI7QEK	89	PT9BM
15	LU5ILA	40	JO2ASQ	65	SM3NRY	90	FG8OJ
16	W5PFG	41	VE3HLS	66	KE9AJ	91	YU0W
17	AK8CW	42	BG7QIW	67	F4DXV	92	BG5CZD
18	N9IP	43	HJ5LVR	68	VE1CWJ	93	PU4CEB
19	AD0DX	44	LA9XGA	69	AA5PK	94	W8MTB
20	AD0HJ	45	VK5DG	70	AD7DB	95	N4DCW
21	DL2GRC	46	N7AGF	71	KM4LAO	96	WA9JBQ
22	N4AKV	47	K7TAB	72	M1DDD	97	BA8AFK
23	ND0C	48	DF2ET	73	HB9GWJ	98	VE3GOP
24	WD9EWK	49	JL3RNZ	74	VA7LM	99	JM1CAX
25	BA1PK	50	KE0WPA	75	N8RO	100	PS8BR

[ANS thanks @GridMasterMap for the above information]

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AMSAT Remove Before Flight Key Tags Now Available
Yes, These are the Real Thing!

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Changes to AMSAT TLE Distribution for December 5, 2025

Two Line Elements or TLEs, often referred to as Keplerian elements or keps in the amateur community, are the inputs to the SGP4 standard mathematical model of spacecraft orbits used by most amateur tracking programs. Weekly updates are completely adequate for most amateur satellites. TLE bulletin files are updated daily in the first hour of the UTC day. New bulletin files will be posted immediately after reliable elements become available for new amateur satellites. More information may be found at https://www.amsat.org/keplerian-elements-resources/.

The following satellites have been added to this week’s AMSAT TLE Bulletin:
SPIRONE NORAD Cat ID 66657
K-HERO NORAD Cat ID 66660

[ANS thanks Joe Fitzgerald, KM1P, AMSAT Orbital Elements Manager, for the above information.]

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ARISS News

Amateurs and others around the world may listen in on contacts between amateurs operating in schools and allowing students to interact with astronauts and cosmonauts aboard the International Space Station. The downlink frequency on which to listen is 145.800 MHz worldwide.

Scheduled Contacts

+ Recently Completed

Istituto Di Istruzione Superiore “Il Tagliamento” Di Spilimbergo / Istituto Comprensivo “G. Mazzini”, Spilimbergo, Italy, telebridge via IK1SLD
The ISS callsign was OR4ISS
The scheduled crewmember was Zena Cardman KJ5CMN
The ARISS mentors were IZ2GOJ and IKØWGF
Contact was successful: Fri 2025-11-28 11:40:17 UTC
Congratulations to the Istituto Di Istruzione Superiore “Il Tagliamento” Di Spilimbergo (Pn) and Istituto Comprensivo “G. Mazzini” students, Zena, mentors IZ2GOJ and IKØWGF, and telebridge via IK1SLD!
Watch the Livestream at https://www.ariotti.com/ and https://www.youtube.com/live/MgG7kcYvxWM

Russian State Agrarian University – Moscow Agricultural Academy named after K.A. Timiryazev, Moscow, Russia, direct via TBD
The ISS callsign was RSØISS
The scheduled crewmember was Sergey Kud-Sverchkov
The ARISS mentor was RV3DR
Contact was successful: Fri 2025-12-05 11:00 UTC
Congratulations to the students of the Russian State Agrarian University – Moscow Agricultural Academy, Sergey Kud-Sverchkov, and mentor RV3DR on a successful contact!

Lincoln Magnet School, Springfield, Illinois, direct via K9OK
The ISS callsign was NA1SS
The scheduled crewmember was Jonathan (Jonny) Kim KJ5HKP
The ARISS mentor was AJ9N
Contact was successful: Fri 2025-12-05 15:29:41 UTC
Congratulations to the students of Lincoln Magnet School, Jonathan (Jonny) Kim KJ5HKP, and mentor AJ9N on a successful contact!

+ Upcoming Contacts

None currently scheduled

Many times a school may make a last-minute decision to do a Livestream or run into a last-minute glitch requiring a change of the URL but we at ARISS may not get the URL in time for publication.  You can always check https://live.ariss.org/ to see if a school is Livestreaming.

As always, if there is an EVA, a docking, or an undocking; the ARISS radios are turned off as part of the safety protocol.

The crossband repeater remains configured in the Columbus Module (145.990 MHz up {PL 67} & 437.800 MHz down). If a crewmember decides to pick up the microphone and turn up the volume, you may hear them on the air—so keep listening, as you never know when activity might occur.

The service module IORS is not currently in APRS configuration and is being used only for voice contacts at this time. HamTV in the Columbus Module is configured for scheduled digital amateur television operations on 2395.00 MHz.

Note, all times are approximate. It is recommended that you do your own orbital prediction or start listening about 10 minutes before the listed time.

The latest information on the operation mode can be found at https://www.ariss.org/current-status-of-iss-stations.html

The latest list of frequencies in use can be found at https://www.ariss.org/contact-the-iss.html

[ANS thanks Charlie Sufana, AJ9N, one of the ARISS operation team mentors for the above information.]

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AMSAT Ambassador Activities

AMSAT Ambassadors provide presentations, demonstrate communicating through amateur satellites, and host information tables at club meetings, hamfests, conventions, maker faires, and other events.

AMSAT Ambassador Clint Bradford, K6LCS, says,

“Think a 75-minute presentation on “working the easy satellites” would be appropriate for your club or event? Let me know by emailing me at k6lcsclint (at) gmail (dot) com or calling me at 909-999-SATS (7287)!”

Clint has NEVER given the exact same show twice: EACH of the 150+ presentations so far has been customized/tailored to their audiences.

Scheduled Events

None currently scheduled.

For more information go to: https://www.amsat.org/ambassador/

[ANS thanks Bo Lowrey, W4FCL, Director – AMSAT Ambassador Program, for the above information.]

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Want to fly the colors on your own grid expedition?
Get an AMSAT car flag and other neat stuff from our Zazzle store!

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AMSAT News Service

ANS-313
November 9, 2025

In this edition:

* SpaceX Bandwagon-4 Mission Places CEVROSAT-1 in Orbit with Rideshare Payloads
* CatSat to Open Microwave Linear Transponder Access for Amateur Radio Community
* ARISS to Mark 25 Years of ISS With Special Worldwide SSTV Event in November
* Digital Library of Amateur Radio and Communications Adds AMSAT Publications
* AI Fix from Earth Restores James Webb Telescope Clarity, No Astronauts Needed
* Changes to AMSAT-NA TLE Distribution for November 7, 2025
* ARISS News
* AMSAT Ambassador Activities
* Satellite Shorts From All Over

The AMSAT® News Service bulletins are a free, weekly news and information service of AMSAT, The Radio Amateur Satellite Corporation. ANS publishes news related to Amateur Radio in Space including reports on the activities of a worldwide group of Amateur Radio operators who share an active interest in designing, building, launching and communicating through analog and digital Amateur Radio satellites.

The news feed on https://www.amsat.org publishes news of Amateur Radio in Space as soon as our volunteers can post it.

Please send any amateur satellite news or reports to: ans-editor [at] amsat.org

You can sign up for free e-mail delivery of the AMSAT News Service Bulletins via the ANS List; to join this list see: https://mailman.amsat.org/postorius/lists/ans.amsat.org/

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SpaceX Bandwagon-4 Mission Places CEVROSAT-1 in Orbit with Rideshare Payloads

SpaceX launched its Bandwagon-4 rideshare mission on November 2 at 0509 UTC from Cape Canaveral Space Force Station, deploying eighteen satellites into a mid-inclination low Earth orbit. The flight is part of SpaceX’s dedicated mid-inclination rideshare program, complementing the Transporter series that serves sun-synchronous orbit customers. All spacecraft were successfully released from the Falcon 9 upper stage approximately seventy-five minutes after liftoff.

The manifest included CEVROSAT-1, an amateur radio satellite built by CEVRO University in the Czech Republic in partnership with Mendel University in Brno and Brno University of Technology. The 48-kilogram microsatellite carries a 9k6 G3RUH GFSK digipeater and AX.25 telemetry on 436.025 MHz, coordinated through the IARU. First signals were received shortly after deployment, with amateur operators reporting telemetry and digipeated packets and uploading frames to the SatNOGS network. The satellite supports student research, hands-on engineering education, and amateur radio experimentation, including an Earth-imaging payload and an optical reflector system for laser technology trials.

The largest spacecraft on the mission was a synthetic aperture radar (SAR) imaging satellite for South Korea’s Project 425 defense reconnaissance program. This continues South Korea’s partnership with SpaceX to deploy a constellation of independent surveillance satellites, following earlier launches on previous Bandwagon missions. The spacecraft is expected to provide high-resolution radar imagery to support national security and intelligence activities.

Commercial Earth-observation company Iceye launched three additional SAR satellites for the Emirati firm Space42, expanding the “Foresight Constellation” for regional surveillance and environmental monitoring. Weather intelligence provider Tomorrow.io also flew two spacecraft to enhance its global atmospheric sensing network, supporting improved forecasting and climate-modeling applications.

Commercial space station developer Vast deployed its Haven-Demo spacecraft, a 500-kilogram technology demonstrator designed to validate systems for the upcoming Haven-1 private station. The satellite will test avionics, communications, propulsion, and power systems in orbit. In addition, Starcloud launched Starcloud-1, a technology demonstration spacecraft billed as the first on-orbit artificial-intelligence compute node, featuring an advanced Nvidia processor intended to run large language models in space.

The Bandwagon-4 mission demonstrates the increasing diversity of spacecraft utilizing commercial rideshare launches, spanning defense, scientific, commercial, and amateur radio missions. With CEVROSAT-1 now active on orbit, radio amateurs are encouraged to monitor 436.025 MHz and submit reception reports as commissioning continues.

Read the full article at: https://spacenews.com/spacex-launches-fourth-bandwagon-rideshare-mission/

[ANS thanks Jeff Foust, SpaceNews, and the Libre Space community, for the above information]

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CatSat to Open Microwave Linear Transponder Access for Amateur Radio Community

The CatSat team has announced that preparations are underway to open public operation of the spacecraft’s linear transponder, offering the amateur-radio community a new microwave-band satellite resource. CatSat, a 6U CubeSat developed and flown by students, faculty, and staff at the University of Arizona in partnership with FreeFall Aerospace and Rincon Research, has been on orbit since July 2024 and is now entering the phase of its mission focused on community engagement and technology demonstration.

CatSat was launched aboard a Firefly Aerospace Alpha rocket from Vandenberg Space Force Base as part of NASA’s CubeSat Launch Initiative. Measuring roughly the size of a family-size cereal box, the spacecraft carries a suite of experimental payloads, including a novel inflatable antenna capable of enabling large-aperture communications from a small satellite platform. In addition to ionospheric monitoring via high-frequency (HF) radio measurements and imaging of the Earth, CatSat includes a linear transponder for amateur radio, extending the University of Arizona’s long legacy in space science down to hands-on student involvement.

The satellite orbits Earth in a nearly sun-synchronous polar orbit, circling the globe approximately every 90 minutes. As part of its student-driven mission, CatSat is demonstrating how cutting-edge antenna systems and commercial-off-the-shelf radio hardware can support meaningful research and amateur communications from a compact form factor. The mission is funded by the University of Arizona Office of the Vice President for Research and the Arizona Space Institute, with additional support from industry partners.

When the linear transponder is active, CatSat listens on 5.663 GHz (uplink) and transmits on 10.47 GHz (downlink), providing approximately 200 kHz of bandwidth. Patch antennas on the spacecraft’s −Y face offer roughly 60-degree beam coverage, and the attitude-control system can point the antenna footprint at ground stations for up to 10 minutes per pass. Power considerations limit each activation to about 15 minutes, a balance that allows the spacecraft to support both mission science and amateur communications.

Early on-orbit demonstrations used a 1-meter C-band uplink dish and a 6.1-meter X-band downlink dish to confirm transponder functionality, successfully relaying Morse code. The CatSat team is now constructing a more accessible ground station using 1-meter-class commercial antennas to show that amateur access is practical with reasonably sized equipment. Operators will be able to monitor schedule updates — informally known as the “five and dime” plan — through the CatSat mission website.

Commissioning passes targeting the CatSat ground stations in Tucson took place on October 29 and November 2, with one final activation scheduled for November 9 at approximately 7:50 PM MST (UTC-7) — just hours after this bulletin’s publication. As testing continues, dates may shift as the team evaluates performance and power-budget constraints. Operators can follow activation plans and future opportunities at https://catsat.arizona.edu.

Read the full announcement at: https://catsat.arizona.edu/news/catsat-team-preparing-public-linear-transponder-operations

[ANS thanks the CatSat Team and the University of Arizona for the above information]

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Only 7 Weeks Left to Get Your Coin!
Celebrate the 40th Anniversary of Amateur Radio on Human Spaceflight
Help Support GOLF and FoxPlus.

Annual memberships start at only $120
Join the AMSAT President’s Club today and help
Keep Amateur Radio in Space!
https://www.amsat.org/join-the-amsat-presidents-club/

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ARISS to Mark 25 Years of ISS With Special Worldwide SSTV Event in November

Amateur Radio on the International Space Station (ARISS) will commemorate the 25th anniversary of continuous human presence aboard the International Space Station with a special worldwide Slow-Scan Television (SSTV) event in mid-November. The ISS has been continuously inhabited since November 2, 2000, marking a major milestone in human spaceflight and international cooperation. ARISS, the first educational payload on the station, continues to play a key role in inspiring students, supporting STEM engagement, and connecting the global amateur radio community with astronauts in orbit.

The Series 30 SSTV event, titled “ISS at 25 and Scouts!” will feature 12 SSTV images celebrating the station’s 25-year milestone and Scouting. Transmissions are scheduled to begin Wednesday, November 12 around 1730 UTC and continue through Thursday, November 20 (time TBD). Downlink will occur on 145.800 MHz FM using the PD120 mode, following the standard ARISS pattern of approximately two minutes of transmission followed by two minutes off. A planned pause in images will occur to support an ARISS school contact with Azerbaijan on November 16 at 1450 UTC.

Radio amateurs and listeners worldwide are encouraged to participate, as ISS SSTV events are accessible to stations with a broad range of equipment. Many operators successfully receive images using only a handheld VHF radio and a phone-based decoding app, while more advanced satellite stations can produce particularly clean results. SSTV events continue to be a popular entry point for newcomers interested in amateur space communication.

Participants may upload their best received image to the ARISS SSTV portal at https://ariss-usa.org/ARISS_SSTV/ and then request a commemorative event certificate. Submitted images must be single, unedited SSTV frames in GIF, JPG, or PNG format, limited to 800×800 pixels and 800 kB. Once the image is uploaded, operators will be prompted to request their personalized certificate, and because submissions are only accepted for a short time after the conclusion of the event, prompt participation is encouraged.

In keeping with past ARISS activities, operators may also request a traditional ARISS QSL card to confirm SSTV reception. QSL requests must be mailed to the appropriate regional bureau with a self-addressed stamped envelope or sufficient return postage. Details and mailing addresses for each world region are available at https://www.ariss.org/qsl-cards.html, and operators should include date, time, frequency, and mode with their report.

Additional updates and operating details will be posted on www.ariss.org and ARISS social media channels as the event approaches. AMSAT congratulates ARISS and the ISS program on 25 years of continuous human presence aboard the station and encourages radio amateurs everywhere to join in this special commemorative SSTV celebration honoring the ISS legacy and the role of amateur radio in space education.

[ANS thanks Amateur Radio on the International Space Station (ARISS) for the above information]

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Digital Library of Amateur Radio and Communications Adds AMSAT Publications

The Digital Library of Amateur Radio and Communications recently added publications provided by AMSAT from 1969-2013 to the Internet Archive. These include the vast majority of issues of the AMSAT Newsletter, AMSAT Satellite Report, AMSAT’s ORBIT magazine, and The AMSAT Journal for that time period.

The Digital Library of Amateur Radio and Communications is a library of materials and collections related to amateur radio and early communications. The DLARC is funded by a significant grant from Amateur Radio Digital Communications, a private foundation, to create a digital library that documents, preserves, and provides open access to the history of this community.

The Digital Library of Amateur Radio and Communications can be accessed at https://archive.org/details/dlarc

AMSAT publications can be found at https://archive.org/search?query=creator%3A%22AMSAT%22

Issues of The AMSAT Journal from 2014 to the present can be accessed by AMSAT members at https://launch.amsat.org/The_AMSAT_Journal

[ANS thanks the Digital Library of Amateur Radio and Communications for the above information]

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AI Fix from Earth Restores James Webb Telescope Clarity, No Astronauts Needed

NASA’s James Webb Space Telescope (JWST) has received a remarkable upgrade — not from astronauts or hardware, but from artificial intelligence. Researchers at the University of Sydney developed a software-based solution that corrected subtle image blurring in one of JWST’s most sensitive instruments, restoring the telescope’s precision without the need for any on-orbit servicing mission.

The issue affected JWST’s Aperture Masking Interferometer (AMI), a specialized instrument designed to resolve extremely fine features when observing stars and exoplanets. Soon after operations began, scientists noticed faint distortions caused by tiny electronic effects within the infrared detector. Rather than planning a complex repair mission, similar to how astronauts serviced the Hubble Space Telescope decades ago, the team pursued a software-only approach.

Two PhD researchers, Louis Desdoigts and Max Charles, created a new calibration system called AMIGO that uses artificial intelligence to model the behavior of JWST’s detector in space. By correcting a phenomenon known as the “brighter-fatter effect,” where electrical charge slightly spreads between pixels, their software restored AMI’s ability to produce extremely sharp, high-contrast images from millions of miles away.

With the correction applied, JWST has achieved sharper-than-ever detections of faint and closely orbiting objects. The team demonstrated improved imaging of a dim exoplanet and a brown dwarf companion orbiting the nearby star HD 206893, about 133 light-years from Earth. Additional examples included high-resolution observations of Io’s volcanic surface, a Wolf-Rayet star system, and a distant black hole jet — confirming that the fix significantly boosts scientific capability.

The effort highlights a growing era where software and artificial intelligence can enhance or even “repair” spacecraft from the ground. “Instead of sending astronauts to bolt on new parts, they managed to fix things with code,” said Professor Peter Tuthill of the University of Sydney, whose group originally contributed the AMI instrument design for JWST. The achievement underscores both the telescope’s flexibility and Australia’s strong role in cutting-edge astronomical instrumentation.

The research has now been publicly released and peer-review is underway. The software tools are being prepared for use by the broader JWST science community, ensuring the telescope continues delivering unmatched views of the universe — all thanks to a clever fix developed on Earth, with no spacewalks or hardware intervention required.

Read the full article at: https://scitechdaily.com/how-ai-saved-nasas-10-billion-webb-telescope-from-blurry-vision/

ANS thanks University of Sydney and SciTechDaily for the above information]

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AMSAT Remove Before Flight Key Tags Now Available
Yes, These are the Real Thing!

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Changes to AMSAT TLE Distribution for November 7, 2025

Two Line Elements or TLEs, often referred to as Keplerian elements or keps in the amateur community, are the inputs to the SGP4 standard mathematical model of spacecraft orbits used by most amateur tracking programs. Weekly updates are completely adequate for most amateur satellites. TLE bulletin files are updated daily in the first hour of the UTC day. New bulletin files will be posted immediately after reliable elements become available for new amateur satellites. More information may be found at https://www.amsat.org/keplerian-elements-resources/.

This week there are no additions or deletions to the AMSAT TLE distribution.

[ANS thanks Joe Fitzgerald, KM1P, AMSAT Orbital Elements Manager, for the above information.]

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ARISS News

Amateurs and others around the world may listen in on contacts between amateurs operating in schools and allowing students to interact with astronauts and cosmonauts aboard the International Space Station. The downlink frequency on which to listen is 145.800 MHz worldwide.

Scheduled Contacts

+ Recently Completed

Petőfi Sándor Evangélikus Gimnázium, Kollégium és Általános Iskola, Mezőberény, Hungary, Telebridge via K6DUE
The ISS callsign was NA1SS
The scheduled crewmember was Jonathan (Jonny) Kim KJ5HKP
Contact was successful: Fri 2025-11-07 08:13:22 UTC
Watch the Livestream at https://www.facebook.com/share/16x7e1jvTv/ and https://www.facebook.com/mpseg/live_videos/

+ Upcoming Contacts

Colegio Del Faro, Benavídez, Tigre, Argentina, direct via LU4BB
The ISS callsign is presently scheduled to be NA1SS
The scheduled crewmember is Mike Fincke KE5AIT
The ARISS mentor is VE3TBD
Contact is go for: Tue 2025-11-11 18:18 UTC

SPACE Academy of Azercosmos, Baku, Azerbaijan, direct via 4K4AZE
The ISS callsign is presently scheduled to be OR4ISS
The scheduled crewmember is Mike Fincke KE5AIT
The ARISS mentor is SP3QFE
Contact is go for: Sun 2025-11-16 14:53 UTC

Russian school TBD, direct via TBD
The ISS callsign is presently scheduled to be RSØISS
The scheduled crewmember is Oleg Platonov
The ARISS mentor is RV3DR
Contact is go for Tue 2025-11-18 10:10 UTC

Russian school TBD, direct via TBD
The ISS callsign is presently scheduled to be RSØISS
The scheduled crewmember is Oleg Platonov
The ARISS mentor is RV3DR
Contact is go for Thu 2025-11-20 14:50 UTC

Many times a school may make a last-minute decision to do a Livestream or run into a last-minute glitch requiring a change of the URL but we at ARISS may not get the URL in time for publication.  You can always check https://live.ariss.org/ to see if a school is Livestreaming.

As always, if there is an EVA, a docking, or an undocking; the ARISS radios are turned off as part of the safety protocol.

The crossband repeater continues to be active (145.990 MHz up {PL 67} & 437.800 MHz down),  If any crewmember is so inclined, all they have to do is pick up the microphone, raise the volume up, and talk on the crossband repeater. So give a listen, you just never know.

Packet operations continue to be active (145.825 MHz up & down). HamTV is configured (2395.00 MHz).

Note, all times are approximate. It is recommended that you do your own orbital prediction or start listening about 10 minutes before the listed time.

The latest information on the operation mode can be found at https://www.ariss.org/current-status-of-iss-stations.html

The latest list of frequencies in use can be found at https://www.ariss.org/contact-the-iss.html

[ANS thanks Charlie Sufana, AJ9N, one of the ARISS operation team mentors for the above information.]

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AMSAT Ambassador Activities

AMSAT Ambassadors provide presentations, demonstrate communicating through amateur satellites, and host information tables at club meetings, hamfests, conventions, maker faires, and other events.

AMSAT Ambassador Clint Bradford, K6LCS, says,

“Think a 75-minute presentation on “working the easy satellites” would be appropriate for your club or event? Let me know by emailing me at k6lcsclint (at) gmail (dot) com or calling me at 909-999-SATS (7287)!”

Clint has NEVER given the exact same show twice: EACH of the 150+ presentations so far has been customized/tailored to their audiences.

Scheduled Events

None currently scheduled.

For more information go to: https://www.amsat.org/ambassador/

[ANS thanks Bo Lowrey, W4FCL, Director – AMSAT Ambassador Program, for the above information.]

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Want to fly the colors on your own grid expedition?
Get an AMSAT car flag and other neat stuff from our Zazzle store!

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AMSAT News Service

ANS-264
September 21, 2025

In this edition:

* AMSAT 2025 Board of Directors Election Results Announced to Membership
* Special Hotel Rate Deadline is September 24 for AMSAT 43rd Annual Symposium
* AMSAT July/August 2025 AMSAT Journal Now Available for Member Download
* Open Letter from AMSAT-SM Highlights Need for Full Duplex Handheld Radio
* Wow@Home Project Builds Worldwide SDR Telescope Network to Monitor the Sky
* Northrop Grumman’s Cygnus XL Debuts with Record Cargo Delivery to ISS
* Changes to AMSAT-NA TLE Distribution for September 19, 2025
* ARISS News
* AMSAT Ambassador Activities
* Satellite Shorts From All Over

The AMSAT® News Service bulletins are a free, weekly news and information service of AMSAT, The Radio Amateur Satellite Corporation. ANS publishes news related to Amateur Radio in Space including reports on the activities of a worldwide group of Amateur Radio operators who share an active interest in designing, building, launching and communicating through analog and digital Amateur Radio satellites.

The news feed on https://www.amsat.org publishes news of Amateur Radio in Space as soon as our volunteers can post it.

Please send any amateur satellite news or reports to: ans-editor [at] amsat.org

You can sign up for free e-mail delivery of the AMSAT News Service Bulletins via the ANS List; to join this list see: https://mailman.amsat.org/postorius/lists/ans.amsat.org/

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AMSAT 2025 Board of Directors Election Results Announced to Membership

The 2025 AMSAT Board of Directors Election concluded on September 15, 2025, with a total of 330 votes cast. Four seats were up for election this year, with the four candidates receiving the highest number of votes elected to two-year terms on the Board of Directors, and the candidate receiving the next highest number of votes designated as Alternate Director for a one-year term.

The following have been elected to serve on the AMSAT Board of Directors:
Drew Glasbrenner, KO4MA – 261 votes
Jerry Buxton, NØJY – 254 votes
Barry Baines, WD4ASW – 245 votes
Frank Karnauskas, N1UW – 232 votes

Alternate Director:
Douglas Tabor, N6UA – 213 votes

The AMSAT Board of Directors is responsible for setting the organization’s strategic direction, overseeing satellite projects and operations, supporting educational outreach, and fostering collaboration with partners worldwide. The Board ensures that AMSAT continues to fulfill its mission of advancing amateur radio in space for the benefit of members and the broader amateur-radio community.

[ANS thanks Doug Tabor, N6UA, AMSAT Secretary, for the above information]

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Special Hotel Rate Deadline is September 24 for AMSAT 43rd Annual Symposium

The deadline to reserve a hotel room at the AMSAT special rate for the 43rd Annual Space Symposium and Annual General Meeting is Tuesday, September 24. The discounted rate of $129 plus tax is offered at the Holiday Inn & Suites Phoenix Airport North, located minutes from Phoenix Sky Harbor Airport.

All rooms are two-room suites with a choice of two Queens or one King, and include breakfast, free parking, a free airport shuttle, outdoor pool, brew pub, courtyard, and fully updated rooms. Reservations must be made directly with the hotel using Group Code: P7C, and discounted rooms are limited.

Reservations can be made by calling 877-424-2449 or online at:
https://www.ihg.com/holidayinn/hotels/us/en/phoenix/phxff/hoteldetail
(Select “Group Rate” under Rate Preference and enter P7C before continuing.)

[ANS thanks Frank Karnauskas, N1UW, AMSAT VP – Development, for the above information]

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AMSAT July/August 2025 AMSAT Journal Now Available for Member Download

The July/August 2025 edition of The AMSAT Journal is now available to members. The AMSAT Journal is AMSAT’s bi-monthly digital magazine dedicated to amateur radio in space. Each issue features technical articles, educational initiatives, operating activities, and community news from around the world. Members can access both the latest edition and the full archive through the AMSAT member portal.

Inside the Current Issue: Apogee View – Robert Bankston, KE4AL; Educational Relations Update – Alan Johnston, KU2Y; AMSAT Field Day 2025 Results – Bruce Paige, KK5DO; An Amateur Radio Eye on AI – Joe Kornowski, KB6IGK; Experimental Validation of the Mexican Network of Amateur Satellite Stations (REMEASAT) – Omar Álvarez Cárdenas, XE1AO, et al.

This issue opens with Robert Bankston, KE4AL, delivering his final Apogee View column as AMSAT President. Bankston reflects on five years of leadership, thanking members and volunteers for their dedication while emphasizing the need to continue pushing forward with higher orbits, expanded communications, and vigilance in protecting amateur frequencies. Educational outreach is another key theme, with Alan Johnston, KU2Y, providing updates on the CubeSatSim project, STEM activity guides, and recent demonstrations in the U.S. and Australia. He also previews educational sessions at both the AMSAT Space Symposium and AMSAT-UK Colloquium this October.

Contest enthusiasts will enjoy Bruce Paige’s, KK5DO, detailed report on the 2025 AMSAT Field Day. This year saw seventeen participating stations with highlights including innovative setups, first-time satellite contacts, and several memorable QSOs with the ISS. Other technical features include Joe Kornowski’s article, An Amateur Radio Eye on AI, exploring practical applications of artificial intelligence for weak-signal decoding, propagation forecasting, and antenna optimization, as well as a comprehensive study on the Experimental Validation of the Mexican Network of Amateur Satellite Stations (REMEASAT), showcasing citizen-science collaboration across Mexico and beyond.

Beyond the feature articles, the issue also highlights upcoming events such as the 43rd Annual AMSAT Space Symposium & Annual General Meeting, scheduled for October 16–19 in Phoenix, Arizona. Members will also find announcements on opportunities to support AMSAT through the President’s Club and eBay for Charity initiatives, reflecting the many ways volunteers and donors continue to strengthen AMSAT’s mission of keeping amateur radio in space.

AMSAT members can access the July/August 2025 edition and archived issues at: https://launch.amsat.org/The_AMSAT_Journal

[ANS thanks Joe Kornowski, KB6IGK, Editor-in-Chief of The AMSAT Journal, for the above information]

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Open Letter from AMSAT-SM Highlights Need for Full Duplex Handheld Radio

In August, the AMSAT-SM group in Sweden issued an open letter to several major amateur radio manufacturers calling for the development of a new handheld transceiver with true full duplex capability. The initiative, led by Lars Thunberg, SM0TGU, highlights the strong demand within the satellite operating community for modern equipment that supports simultaneous transmit and receive on different bands without desense.

The letter was sent to a dozen manufacturers, including Icom, Kenwood, Yaesu, Alinco, Baofeng, TYT, Wouxun, Retevis, AnyTone, QYT, Radtel, and Verotelecom. These companies represent both long-established Japanese firms and newer Chinese brands that have introduced a wide variety of handhelds in recent years. While today’s radios often feature APRS, GPS, Bluetooth, and USB-C charging, none currently provide the full duplex FM capability needed for effective satellite operation.

AMSAT-SM emphasized that full duplex operation is vital for amateur satellite use, allowing operators to hear their own downlink while transmitting. This feature was present in older, now-discontinued models such as the Kenwood TH-D72, but is missing from all currently produced handhelds. The group argued that satellite operators would be willing to pay a premium for this capability, and that manufacturers could capture a unique market by stepping into this space.

Among the minimum technical requirements outlined were extended filtering between the VHF and UHF bands, robust desense protection, support for both memory and VFO operation in duplex mode, CTCSS subtone transmission, and a rugged external antenna connector for portable Yagi antenna use. Practical considerations such as USB-C charging, selectable power output up to five watts, and energy-efficient design for longer battery life were also highlighted as priorities.

AMSAT-SM further suggested several “nice to have” features that could broaden the radio’s appeal. These included APRS with GPS, Bluetooth support for wireless headsets, and computer connectivity over Bluetooth for channel programming and Doppler control. The group specifically recommended implementing the CAT protocol over Bluetooth, which would allow operators to use existing satellite tracking and Doppler correction software without proprietary apps.

As of August 30, AMSAT-SM reported that three of the twelve manufacturers contacted had responded to their appeal, with one company moving forward in discussions. While details remain confidential, the group encourages operators to stay tuned for updates. The effort reflects both the continuing innovation within the amateur satellite community and the strong desire for modern, purpose-built equipment to support space-based communication.

Read the full letter at: https://www.amsat.se/2025/08/16/open-letter-from-amsat-sm-regarding-development-of-a-full-duplex-handheld/

[ANS thanks Lars Thunberg, SM0TGU and AMSAT-SM for the above information]

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AMSAT Remove Before Flight Key Tags Now Available
Yes, These are the Real Thing!

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Wow@Home Project Builds Worldwide SDR Telescope Network to Monitor the Sky

The Wow@Home project, inspired by the famous “Wow!” signal detected in 1977, is advancing its effort to establish a global network of small, software defined radio (SDR) telescopes dedicated to searching for transient astrophysical events and potential technosignatures. Testing of hardware and software continues, though progress has been slowed by a shortage of low-noise amplifiers (LNAs), a key component expected back in stock later this month. Project organizers note that the original Wow! signal was strong enough to have been detected by a modest home telescope, underscoring the scientific value of a distributed approach.

A worldwide network of small radio telescopes offers distinct advantages compared to professional observatories. These low-cost systems can operate autonomously around the clock, providing continuous sky monitoring that large instruments cannot sustain. Distributed across different time zones, the network allows global coverage, coincidence detection of events, and rapid response to alerts. The approach is scalable, resilient, and accessible, making it ideal for education, citizen science, and wider participation in radio astronomy.

The prototype Wow@Home telescope is a meridian-style system modeled after the Big Ear telescope used in the Ohio State SETI project. With a fixed elevation and a wide 25-degree beam, the telescope surveys a full 360-degree strip of sky each day as the Earth rotates. Over time, multiple passes yield full-sky coverage. While sensitivity is lower than professional instruments, this design provides valuable data on radio frequency interference (RFI) near the hydrogen line and creates a platform for detecting strong transient events.

Central to the project is the Wow@Home software, now under development. Built initially in IDL (Interactive Data Language) and later to be translated to Python for broader access, the software acquires and analyzes data to identify transient events and reject RFI. Early test results include signal-to-noise plots, hydrogen spectral profiles of the Galactic center, and narrowband event detections. A unique “retro” display option is also being developed to recreate the printout style of the original Ohio SETI experiments, connecting modern work to its historic roots.

The Wow@Home network is not an interferometer and does not measure polarization at this stage. Its strength lies in continuous, distributed monitoring for signals lasting from seconds to days. Coordinated observations across multiple sites can confirm weak or short-lived events, eliminate local interference, and provide complementary coverage to large observatories. Recent discoveries of Fast Radio Bursts and long-period transients illustrate the types of phenomena that modest instruments may detect if deployed widely.

Looking ahead, organizers estimate that at least 114 telescopes are required for basic sky coverage, with about 342 needed for effective redundancy and RFI rejection. At a cost of roughly $500 per station, the full network could be established for under $200,000—far less than a single professional facility. A public version of the Wow@Home software is expected by late 2025 or early 2026. Volunteers with expertise in RFI mitigation, graphical interfaces, or app development are encouraged to contribute. More information is available from project lead Abel Méndez at the University of Puerto Rico (abel.mendez [at] upr.edu).

Project details and updates are available at: https://phl.upr.edu/wow/outreach

[ANS thanks Abel Mendez, University of Puerto Rico at Arecibo, and RTL-SDR.com for the above information]

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Northrop Grumman’s Cygnus XL Debuts with Record Cargo Delivery to ISS

Northrop Grumman’s newest cargo spacecraft, the Cygnus XL, successfully arrived at the International Space Station (ISS) on September 18 following its debut launch. The capture took place at 7:24 a.m. EDT (1124 UTC) as NASA astronaut Jonny Kim operated the station’s Canadarm2 robotic arm to grapple the freighter while the complex orbited about 260 miles (420 kilometers) above the Democratic Republic of Congo. The arrival came one day later than originally planned after the spacecraft overcame a thruster issue during rendezvous preparations.

The mission, designated NG-23, lifted off on September 14 aboard a SpaceX Falcon 9 rocket from Cape Canaveral Space Force Station. This launch marked the 23rd Cygnus resupply flight for NASA, continuing Northrop Grumman’s role in commercial cargo delivery. The company partnered with SpaceX to provide launch services after previously relying on its Antares rocket.

A thruster anomaly initially delayed Cygnus XL’s approach, requiring mission planners to rework the trajectory for a safe capture. “It’s a very intricate planning exercise that we have to go through to arrive at Space Station and rendezvous in a very specific point in space,” explained Bill Spetch, NASA ISS operations integration manager. Engineers resolved the issue, allowing the spacecraft to complete its final maneuvers and reach the station safely.

Cygnus XL represents the largest and most capable version of the cargo vehicle to date. The freighter delivered approximately 11,000 pounds (4,990 kilograms) of supplies, science experiments, and hardware, compared to about 8,500 pounds (3,855 kilograms) on earlier flights. The debut also ended a year-long gap in Cygnus operations, caused by delays to the NG-22 mission, which was ultimately canceled following transport damage.

The NG-23 vehicle was christened the S.S. William “Willie” McCool, honoring the NASA astronaut who lost his life in the 2003 space shuttle Columbia tragedy. “To see a ship bearing his name safely arrive at the station is a reminder that his courage and kindness are still circling our beautiful planet Earth,” said Kim after completing capture operations.

On board are materials to advance research in multiple disciplines, including semiconductor crystal growth, pharmaceutical manufacturing, cryogenic fuel tank technology, and microbial control systems. NASA highlighted a specialized ultraviolet light unit to improve water system safety and crystal-growth experiments that could lead to new cancer treatments. The S.S. McCool was berthed to the Unity module’s Earth-facing port at 10:10 a.m. EDT (1410 UTC) on September 18 and is scheduled to remain at the ISS until March 2026 before deorbiting to burn up in Earth’s atmosphere.

[ANS thanks Mike Wall, Space.com for the above information]

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The 2025 AMSAT President’s Club Coins Have Just Arrived!
Celebrating the 40th Anniversary of Amateur Radio on Human Spaceflight

Help Support GOLF and Fox Plus.
Join the AMSAT President’s Club today!

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Changes to AMSAT TLE Distribution for September 19, 2025

Two Line Elements or TLEs, often referred to as Keplerian elements or keps in the amateur community, are the inputs to the SGP4 standard mathematical model of spacecraft orbits used by most amateur tracking programs. Weekly updates are completely adequate for most amateur satellites. TLE bulletin files are updated daily in the first hour of the UTC day. New bulletin files will be posted immediately after reliable elements become available for new amateur satellites. More information may be found at https://www.amsat.org/keplerian-elements-resources/.

This week there are no additions or deletions to the AMSAT TLE distribution.

[ANS thanks Joe Fitzgerald, KM1P, AMSAT Orbital Elements Manager, for the above information.]

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ARISS News

Amateurs and others around the world may listen in on contacts between amateurs operating in schools and allowing students to interact with astronauts and cosmonauts aboard the International Space Station. The downlink frequency on which to listen is 145.800 MHz worldwide.

Scheduled Contacts

+ Recently Completed

Taka Town Board of Education Children’s Future Division, Taka Town, Japan, direct via JA3YRL
The ISS callsign was OR4ISS
The scheduled crewmember was Kimiya Yui KG5BPH
The ARISS mentor was 7M3TJZ
Contact was successful: Thu 2025-09-11 09:22:34 UTC
Congratulations to the Taka Town Board of Education Children’s Future Division students, Kimiya KG5BPH, mentor 7M3TJZ, and ground station JA3YRL!

National Space Research and Development Agency (NASRDA), Abuja, Nigeria, telebridge via ZS6JON
The ISS callsign was NA1SS
The scheduled crewmember was Zena Cardman KJ5CMN
The ARISS mentor was IN3GHZ
Contact was successful: Sat 2025-09-20 09:37:23 UTC
Congratulations to the NASRDA students, Zena KJ5CMN, mentor IN3GHZ, and ground station ZS6JON!

+ Upcoming Contacts

Amur State University, Blagoveshchensk, Russia, direct via TBD
The ISS callsign is presently scheduled to be RSØISS
The scheduled crewmember is Oleg Platonov
The ARISS mentor is RV3DR
Contact is go for: Wed 2025-09-24 10:00 UTC

Many times a school may make a last-minute decision to do a Livestream or run into a last-minute glitch requiring a change of the URL but we at ARISS may not get the URL in time for publication.  You can always check https://live.ariss.org/ to see if a school is Livestreaming.

As always, if there is an EVA, a docking, or an undocking; the ARISS radios are turned off as part of the safety protocol.

The crossband repeater continues to be active (145.990 MHz up {PL 67} & 437.800 MHz down), If any crewmember is so inclined, all they have to do is pick up the microphone, raise the volume up, and talk on the crossband repeater. So give a listen, you just never know.

Note, all times are approximate. It is recommended that you do your own orbital prediction or start listening about 10 minutes before the listed time.

The latest information on the operation mode can be found at https://www.ariss.org/current-status-of-iss-stations.html

The latest list of frequencies in use can be found at https://www.ariss.org/contact-the-iss.html

[ANS thanks Charlie Sufana, AJ9N, one of the ARISS operation team mentors for the above information.]

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AMSAT Ambassador Activities

AMSAT Ambassadors provide presentations, demonstrate communicating through amateur satellites, and host information tables at club meetings, hamfests, conventions, maker faires, and other events.

AMSAT Ambassador Clint Bradford, K6LCS, says,

“Think a 75-minute presentation on “working the easy satellites” would be appropriate for your club or event? Let me know by emailing me at k6lcsclint (at) gmail (dot) com or calling me at 909-999-SATS (7287)!”

Clint has NEVER given the exact same show twice: EACH of the 150+ presentations so far has been customized/tailored to their audiences.

Scheduled Events

Radio Society of Tucson Autumn Hamfest – September 27, 2025
Calvary Lutheran Church
8711 East Speedway Boulevard
Tucson, AZ 85710
https://k7rst.club/2025/08/rst-autumn-hamfest-2025/
N1UW

North Star Radio Convention – October 11, 2025
Hennepin Technical College
9000 Brooklyn Boulevard
Brooklyn Park, MN 55445
https://northstarradio.org/
ADØHJ

43rd Annual AMSAT Space Symposium & Annual General Meeting – October 16 thru 19, 2025
Holiday Inn & Suites Phoenix Airport North
1515 North 44th Street
Phoenix, Arizona 85008
Details at https://www.amsat.org/2025-symposium/

Interested in becoming an AMSAT Ambassador? AMSAT Ambassadors provide presentations, demonstrate communicating through amateur satellites, and host information tables at club meetings, hamfests, conventions, maker faires, and other events.

For more information go to: https://www.amsat.org/ambassador/

[ANS thanks Bo Lowrey, W4FCL, Director – AMSAT Ambassador Program, for the above information.]

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In this edition:

* JAMSAT’s Blueberry JAM Project to Develop Open-Source CubeSat Transponders for Amateur Radio
* Amateur Weather Satellite Reception Opportunities Beyond the Retired POES Fleet (NOAA-15/18/19)
* Meteoglider Offers Reusable Radiosonde Alternative for High-Altitude Weather Data Collection
* SpaceX’s Starship Flight 10 to Demonstrate Expanded Booster and Upper Stage Test Objectives
* Changes to AMSAT-NA TLE Distribution for August 22, 2025
* ARISS News
* AMSAT Ambassador Activities
* Satellite Shorts From All Over

The AMSAT News Service bulletins are a free, weekly news and information service of AMSAT, the Radio Amateur Satellite Corporation. ANS publishes news related to Amateur Radio in Space including reports on the activities of a worldwide group of Amateur Radio operators who share an active interest in designing, building, launching and communicating through analog and digital Amateur Radio satellites.

The news feed on https://www.amsat.org publishes news of Amateur Radio in Space as soon as our volunteers can post it.

Please send any amateur satellite news or reports to: ans-editor [at] amsat.org

You can sign up for free e-mail delivery of the AMSAT News Service Bulletins via the ANS List; to join this list see: https://mailman.amsat.org/postorius/lists/ans.amsat.org/

ANS-236 AMSAT News Service Weekly Bulletins

To: All RADIO AMATEURS
From: Radio Amateur Satellite Corporation
712 H Street NE, Suite 1653
Washington, DC 20002

DATE 2025 Aug 24

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JAMSAT’s Blueberry JAM Project to Develop Open-Source CubeSat Transponders for Amateur Radio

The Japan Amateur Satellite Association (JAMSAT) has announced the launch of the “Blueberry JAM” initiative, a new project to design and build an open-source multi-mode transponder for CubeSats. A kickoff meeting was held on May 3 with 15 participants, marking the start of what is envisioned as a flagship development effort for the organization.

The Blueberry JAM project centers on creating a versatile linear transponder that can be integrated into 1U CubeSats, while also being scalable to larger 3U and 6U platforms. The design is intended to support both traditional linear operation and potential digital enhancements, such as delay modes and data handling. The first demonstration unit—an engineering model—is targeted for completion by mid-2026 and will be offered to universities and satellite developers for potential flight opportunities.

Jerry Buxton, N0JY, AMSAT VP-Engineering commented, “AMSAT-NA is excited to see the Japan Amateur Satellite Association’s commitment to open-source development and collaboration with amateur satellite organizations around the world with their Blueberry JAM initiative.

“We are pleased to offer our help in this collective effort by providing JAMSAT with any schematics and documentation from AMSAT’s open-source/open-access projects developed to date as well as those being introduced this year.

“This includes our flight-proven LTM-2 Linear Transponder Module that has flown successfully on satellites deployed by two world-class universities and currently still operating on MO-122 and MESAT1. LTM provides telemetry downlink support for the host science missions and satellite health, as well as direct control of the LTM amateur radio usage. A third university is set to carry the latest version of LTM, which will fly on GOLF-TEE and Fox-Plus, on their upcoming mission that is currently under construction.”

A core philosophy of the project is openness. JAMSAT has pledged to make the development process, design documents, and results available to the amateur community. Hardware costs are expected to be covered by JAMSAT, while individual participants will bear their own incidental expenses. By sharing the design broadly, the group hopes to encourage adoption by multiple satellite missions, with a goal of eventually deploying the transponder on as many as 10 spacecraft.

Technical discussions during the kickoff highlighted the demand for new linear transponder capability in amateur satellites, as well as recognition that digital features will be important for future operations. Considerations include dual-channel command and data handling, efficient microcontroller use, and antenna and power system constraints inherent to CubeSats. The team also noted the potential to establish a ground-based test station to exercise the transponder under realistic conditions before flight.

Buxton also said, “We are also very happy to share AMSAT’s work on its upcoming SDR GEN-2, an SDR that provides all-mode functionality and continuous coverage from 144 MHz to 6 GHz providing “Five & Dime” capability in a format to fit 1U or larger CubeSats.

“We look forward to supporting JAMSAT in promoting more international collaborations that continue to Keep Amateur Radio in Space!”

Coordination for the project will be managed initially through mailing lists, with Slack and other online tools supporting more detailed technical exchanges. Meetings will be held on an ad-hoc basis until a regular schedule is established. Participants also suggested supplementary seminars to review background information and prior work for the benefit of newer contributors.

By positioning Blueberry JAM as a fully open-source design, JAMSAT hopes to strengthen international collaboration and demonstrate Japan’s continued leadership in the amateur satellite community. With a development horizon stretching into 2026 and beyond, the project has the potential to become a cornerstone payload for future CubeSat missions and to provide valuable new communication opportunities for amateur operators worldwide.

[ANS thanks JAMSAT and Jerry Buxton, NØJY, AMSAT VP-Engineering for the above information]

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Amateur Weather Satellite Reception Opportunities Beyond the Retired POES Fleet (NOAA-15/18/19)

With the retirement of NOAA-15, NOAA-18, and NOAA-19, the long-running POES (Polar-orbiting Operational Environmental Satellites) series has officially ended service. Some in the community worry this marks the end of easily accessible weather imagery, but the outlook for amateur reception remains bright.

Russia’s Meteor-M satellites are now the mainstay for 137 MHz reception. Their LRPT signals are strong and reliable, and with additional Meteor-M launches planned, service is expected to continue well into the 2040s. Higher-resolution imagery is also available on the 1.7 GHz band for those with modest upgrades in equipment.

Europe’s Metop series continues to transmit on L-band, with Metop-B and -C expected to operate until 2027 and 2030. The newly launched Metop-SG satellites will extend coverage for another decade, ensuring continuity for hobbyists. In addition, the Arctic Weather Satellite and its planned successors (the STERNA series) will provide valuable radiometric data for weather monitoring.

Geostationary satellites also provide opportunities. Russia’s Elektro-L constellation broadcasts HRIT/LRIT on 1691 MHz, with a new spacecraft (N°5) scheduled for launch this October. For those in the Americas, the GOES series will remain active through the 2030s, continuing HRIT and GRB service. The U.S. Space Force’s EWS-G program further adds to the options, re-tasking former GOES satellites for continued imagery.

China’s FengYun-3 satellites and Korea’s GK-2A also contribute, while future developments in X-band reception are lowering the barrier for amateurs interested in higher-resolution Earth observation. Advances in software such as SatDump are making it easier than ever to decode and process these signals on affordable hardware.

The decommissioning of the POES fleet marks the end of an era, but not the end of the hobby. With a diverse mix of active and planned satellites across multiple bands, amateur weather satellite reception will remain an active part of the hobby, supported by a mix of current satellites and future missions. For those interested in exploring these opportunities, the open-source SatDump software can be used to decode imagery from many of the satellites mentioned above. SatDump is available for download at https://www.satdump.org.

Read the full article at: https://www.satdump.org/posts/beyond-poes-amateur-satellite-reception/

[ANS thanks lego11, SatDump.com, and the SatDump community for the above information]

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Meteoglider Offers Reusable Radiosonde Alternative for High-Altitude Weather Data Collection

Swiss weather intelligence company Meteomatics has unveiled the Meteoglider, a reusable glider platform designed to improve the way atmospheric data is gathered. Introduced in the spring of 2025, the Meteoglider advances the familiar radiosonde concept with a sustainable, GPS-guided recovery capability that promises significant operational and environmental benefits.

Radiosondes carried aloft by weather balloons have long provided vital measurements of temperature, humidity, pressure, and wind conditions. These instruments supply essential input for forecasts, climate models, and atmospheric studies. However, conventional radiosondes are almost always lost after deployment. Out of approximately 600,000 units launched worldwide each year, an estimated 80 percent are never recovered, leaving most as non-reusable debris.

The Meteoglider overcomes this challenge by gliding back under control after its flight. Constructed of lightweight foam and weighing only 250 grams, the vehicle ascends to heights of about 110,000 feet before release. Guided by GPS, the Meteoglider can return to its launch point or a designated location, typically completing the descent in around 25 minutes while reaching speeds of nearly 460 feet per second.

Performance remains on par with traditional systems. Meteogliders collect the same high-quality meteorological data as radiosondes, but with the added benefit of multiple reuses. Each unit can be recovered and redeployed as many as 50 times, extending the service life of its lithium batteries and electronics. This significantly reduces the recurring expense of atmospheric soundings while also addressing sustainability goals.

Another advantage is the practicality of operation. Meteogliders do not require special flight permissions and can be deployed as readily as conventional balloon-borne instruments. Their recoverability reduces waste, lowers operating costs, and minimizes the environmental footprint associated with routine meteorological monitoring.

The technology originated with Swiss startup R2Home, which Meteomatics acquired in late 2024 following a $22 million funding round. Together with the company’s established Meteodrone system, Meteogliders represent a new chapter in scalable, sustainable atmospheric sensing. By combining innovation with proven methods, Meteomatics aims to reshape global weather intelligence practices with tools that are both economical and environmentally responsible.

Read the full article at: https://www.aerotime.aero/articles/meteomatics-unveils-the-meteoglider-a-high-altitude-weather-data-revolution

[ANS thanks Miquel Ros, AeroTime.com, and Meteomatics for the above information]

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SpaceX’s Starship Flight 10 to Demonstrate Expanded Booster and Upper Stage Test Objectives

SpaceX is preparing for the tenth integrated test flight of its Starship Super Heavy launch system from Starbase, Texas. Liftoff is targeted for Sunday, August 24, 2025, with a launch window from 6:30 to 7:30 p.m. Central Time. A live webcast will begin approximately 30 minutes before liftoff and will be available on the SpaceX website and X (formerly Twitter) @SpaceX. As with all developmental testing, schedules remain dynamic and subject to change.

This mission follows the completion of investigations into the loss of Starship on Flight 9 and the Ship 36 static fire anomaly. SpaceX reports that both hardware and operational changes have been implemented to improve reliability, with technical summaries of the investigations available online.

The Super Heavy booster will attempt multiple flight experiments on a trajectory toward an offshore landing point in the Gulf of Mexico. Objectives include a controlled flip and boostback maneuver, first demonstrated on Flight 9, designed to conserve propellant and increase payload capacity. These trials are aimed at expanding the operational envelope and validating booster recovery techniques for future missions.

The booster’s landing burn experiments are a primary focus of Flight 10. SpaceX plans to intentionally disable one of the three center engines during the landing sequence, relying on a backup engine from the middle ring to complete the burn. The booster will then transition to a two-engine hover maneuver above the ocean surface before shutdown and splashdown, providing data on redundancy and landing performance.

The Starship upper stage will attempt several in-space demonstrations, including the deployment of eight Starlink mass simulators, a Raptor engine relight, and multiple reentry experiments. To stress-test the thermal protection system, a significant number of heat shield tiles have been removed, while metallic tile alternatives and active cooling systems will be evaluated. These measures are intended to expose vulnerabilities and refine reentry survivability.

Additional objectives include testing functional catch fittings and assessing rear flap performance during maximum entry dynamic pressure. According to SpaceX, these experiments are vital steps toward the development of a rapidly reusable launch system. With manufacturing ramping up at Starfactory in Texas and new launch infrastructure under construction in both Texas and Florida, Starship continues to progress toward operational readiness for future missions.

See the official SpaceX update page at: https://www.spacex.com/launches/starship-flight-10 …and maybe check out the SpaceX Shop for a new T-shirt while you’re at it.

[ANS thanks SpaceX for the above information]

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The 2025 AMSAT President’s Club Coins Have Just Arrived!
Celebrating the 40th Anniversary of Amateur Radio on Human Spaceflight

Help Support GOLF and Fox Plus.
Join the AMSAT President’s Club today!

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Changes to AMSAT-NA TLE Distribution for August 22, 2025

Two Line Elements or TLEs, often referred to as Keplerian elements or keps in the amateur community, are the inputs to the SGP4 standard mathematical model of spacecraft orbits used by most amateur tracking programs. Weekly updates are completely adequate for most amateur satellites. TLE bulletin files are updated daily in the first hour of the UTC day. New bulletin files will be posted immediately after reliable elements become available for new amateur satellites. More information may be found at https://www.amsat.org/keplerian-elements-resources/.

With HamTV becoming active on ISS, orbital elements are now updated twice daily in www.amsat.org/tle/ at 00:18 and 12:18 UTC. The intention is to have high quality TLE available to accurately calculate doppler shift for the 2.935 GHz downlink. Observations comparing these TLE to those that were calculated based ephemerides and TLE produced by Johnson Space Center the last time HAMTV was active are desired, write jfitzgerald [at] amsat.org

The following satellite has been removed from this week’s distribution:

VERONIKA NORAD Cat ID 58261 Decayed from orbit on or about 15 August 2025

[ANS thanks AMSAT Orbital Elements page for the above information]

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ARISS NEWS

Amateurs and others around the world may listen in on contacts between amateurs operating in schools and allowing students to interact with astronauts and cosmonauts aboard the International Space Station. The downlink frequency on which to listen is 145.800 MHz worldwide.

+ Recently Completed

Youngsters On The Air, Jambville, France, Direct via FX5YOTA
The ISS callsign was OR4ISS
The scheduled crewmember was Mike Fincke KE5AIT
The ARISS mentor was F6ICS
Contact was successful: Tue 2025-08-19 09:18:30 UTC
Congratulations to the YOTA students, Mike, mentor F6ICS, and ground station FX5YOTA!
Watch the Livestream at https://www.youtube.com/watch?v=MARkTcR6Njo

NixderStelar (formerly Gemini-1), Lima, Peru, telebridge via VK4KHZ
The ISS callsign was NA1SS
The scheduled crewmember was Zena Cardman KJ5CMN
The ARISS mentor was VE6JBJ
Contact was successful: Wed 2025-08-20 14:07:47 UTC
Congratulations to the NixderStelar students, Zena, and mentor VE6JBJ!

+ Upcoming Contacts

Orion Primary School, Alberton, South Africa, direct via ZS9LSO
The ISS callsign is presently scheduled to be NA1SS
The scheduled crewmember is Mike Fincke KE5AIT
The ARISS mentor is IN3GHZ
Contact is go for: Fri 2025-08-29 09:35:44 UTC

Many times a school may make a last minute decision to do a Livestream or run into a last minute glitch requiring a change of the URL but we at ARISS may not get the URL in time for publication. You can always check https://live.ariss.org/ to see if a school is Livestreaming.

The crossband repeater continues to be active (145.990 MHz up {PL 67} & 437.800 MHz down). If any crewmember is so inclined, all they have to do is pick up the microphone, raise the volume up, and talk on the crossband repeater. So give a listen, you just never know.

The packet system is also active (145.825 MHz up & down).

As always, if there is an EVA, a docking, or an undocking; the ARISS radios are turned off as part of the safety protocol.

Note, all times are approximate. It is recommended that you do your own orbital prediction or start listening about 10 minutes before the listed time.

The latest information on the operation mode can be found at https://www.ariss.org/current-status-of-iss-stations.html

The latest list of frequencies in use can be found at https://www.ariss.org/contact-the-iss.html

[ANS thanks Charlie Sufana, AJ9N, one of the ARISS operation team mentors for the above information]

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AMSAT Ambassador Activities

AMSAT Ambassadors provide presentations, demonstrate communicating through amateur satellites, and host information tables at club meetings, hamfests, conventions, maker faires, and other events.

AMSAT Ambassador Clint Bradford, K6LCS, says,

“Think a 75-minute presentation on “working the easy satellites” would be appropriate for your club or event? Let me know by emailing me at k6lcsclint (at) gmail (dot) com or calling me at 909-999-SATS (7287)!”

Clint has NEVER given the exact same show twice: EACH of the 150+ presentations so far has been customized/tailored to their audiences.

Scheduled Events

Northeast HamXposition (HamX) & New England ARRL Convention – August 21st thru 24th, 2025
Best Western Royal Plaza & Trade Center
181 Boston Post Road West
Marlborough, MA 01752
http://www.HamX.org
W1EME, WD4ASW, WB1FJ

Greater Louisville Hamfest – September 6th, 2025
Paroquet Springs Conference Centre
395 Paroquet Springs Drive
Shepherdsville, KY 40165
https://louisvillehamfest.wixsite.com/louisvillehamfest
W4FCL

North Star Radio Convention – October 11th, 2025
Hennepin Technical College
9000 Brooklyn Boulevard
Brooklyn Park, MN 55445
https://northstarradio.org/
ADØHJ

43rd Annual AMSAT Space Symposium & Annual General Meeting – October 16th thru 19th, 2025
Holiday Inn & Suites Phoenix Airport North
1515 North 44th Street
Phoenix, Arizona 85008
Details at https://www.amsat.org/2025-symposium/

Interested in becoming an AMSAT Ambassador? AMSAT Ambassadors provide presentations, demonstrate communicating through amateur satellites, and host information tables at club meetings, hamfests, conventions, maker faires, and other events.

For more information go to: https://www.amsat.org/ambassador/

[ANS thanks Bo Lowrey, W4FCL, Director – AMSAT Ambassador Program, for the above information]

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AMSAT Remove Before Flight Key Tags Now Available
Yes, These are the Real Thing!

Satellite Shorts From All Over

+ The United States is racing to be the first nation to deploy a nuclear reactor on the lunar surface, following new orders from Acting NASA Administrator Sean Duffy. His directive, issued July 31, calls for fast-tracking lunar nuclear power to stay ahead of China and Russia, who have announced joint plans to build a reactor by the mid-2030s. Duffy warned that if rivals succeed first, they could impose “keep-out zones” that would threaten U.S. access and undermine the Artemis program, which aims to return astronauts to the moon in 2027. The order requires NASA to appoint a program leader within 30 days and expands on previous work with the Department of Energy to develop fission surface power producing at least 40 kilowatts of power. Since long-term lunar operations are estimated to require at least 100 kWe (100 kilowatts of electrical power, or about the consumption of 80–100 U.S. homes), nuclear power is seen as critical for sustaining life on the moon and enabling future Mars missions. In addition, Duffy issued a separate directive to speed up commercial space station development as the International Space Station nears retirement by 2030. (ANS thanks CNN for the above information)

+ SpaceX successfully launched the U.S. Space Force’s X-37B spaceplane aboard a Falcon 9 rocket from Kennedy Space Center on August 21, 2025, marking the start of its eighth mission. The booster, making its sixth flight, landed at Cape Canaveral Space Force Station just over eight minutes after liftoff. The Boeing-built X-37B, part of a two-vehicle fleet, has previously flown missions lasting between 224 and 909 days, though the duration of this new mission is undisclosed. This flight will test advanced technologies, including high-bandwidth laser communications with commercial satellite networks in low Earth orbit, offering faster and more secure data transfer than radio frequencies. It will also demonstrate a quantum inertial sensor, enabling spacecraft navigation in GPS-denied or deep-space environments. Space Force leaders emphasized that these experiments are key to improving the resilience, adaptability, and operational capabilities of U.S. space systems. (ANS thanks Spaceflight Now for the above information)

+ The newly launched NASA-ISRO Synthetic Aperture Radar (NISAR) satellite has successfully deployed a record-breaking 39-foot-wide radar antenna in orbit, unfolding it like a blooming umbrella after weeks of careful preparation. Launched on July 30, 2025, from India’s Satish Dhawan Space Centre, the satellite carries two powerful radar systems—L-band from NASA and S-band from ISRO—capable of penetrating clouds, vegetation, and snow to track changes on Earth’s surface. The massive gold-plated wire mesh reflector, weighing 142 pounds, was released through a carefully staged process involving joint-by-joint boom extension and the firing of explosive bolts. It took four days for the structure to fully extend before motors and cables pulled it into its final drum-like shape. NISAR will provide three-dimensional, high-resolution images of Earth’s land and ice, detecting surface shifts as small as fractions of an inch. By late fall, scientists expect the satellite to begin delivering transformative data, including 3D “movies” of environmental changes across the globe. (ANS thanks Gizmodo for the above information)

SpaceX has partnered with American radio astronomers to develop an automated system that reduces satellite interference with sensitive radio telescopes. The collaboration, led by the National Radio Astronomy Observatory (NRAO), created the Operational Data Sharing system and a Starlink algorithm that redirects satellite beams or mutes electronics during scheduled observations. This system, tested at the Very Large Array in New Mexico, allows telescopes to continue detecting faint cosmic signals despite thousands of satellites crossing overhead daily. Radio astronomers warn that interference from low Earth orbit constellations like Starlink could obscure signals from distant galaxies or even evidence of extraterrestrial life. With satellite numbers expected to rise above 100,000 by 2030, the need for protective measures is urgent. Researchers hope the system will be adopted worldwide and by other satellite operators, enabling astronomy and satellite internet to coexist. If successful, this approach could set a precedent for balancing technological progress with preservation of humanity’s window into the universe (ANS thanks Space.com for the above information)

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Join AMSAT today at https://launch.amsat.org/

In addition to regular membership, AMSAT offers membership to:

* Societies (a recognized group, clubs or organization).
* Primary and secondary school students are eligible for membership at one-half the standard yearly rate.
* Post-secondary school students enrolled in at least half-time status shall be eligible for the student rate for a maximum of 6 post-secondary years in this status.
* Memberships are available for annual and lifetime terms.

Contact info [at] amsat.org for additional membership information.

73 and remember to help Keep Amateur Radio in Space!

This week’s ANS Editor, Mitch Ahrenstorff, ADØHJ
mahrenstorff [at] amsat.org