AO-92 Commissioning Update: Transponder and Camera Tested, Further Camera Tests Planned

The first thirty-six hours of AO-92’s life in orbit have seen a flurry of activity as the AMSAT Engineering and Operations teams walk through an extensive checklist of tests required to check the functionality of the satellite’s on-board systems.

The first crucial test came on the initial pass over AMSAT command stations hours after launch. Around 15:00 UTC on January 12, 2018, AMSAT command stations successfully issued the first command to the satellite, changing it from the initial Beacon Mode to Safe Mode. The switch to Safe Mode allowed the collection of min and max data for the various telemetry values.

As AMSAT Engineering continued to evaluate the data received, the decision was made to test the U/v FM transponder briefly on the evening passes over North America. At approximately 01:30 UTC on January 13, 2018, the satellite was commanded to Transponder Mode for the first time. Initial tests show the transponder functions very well. One testing station was able to access the satellite using 5 watts from an HT to a whip antenna from inside his house at approximately ten degrees of elevation. AMSAT Engineering reminds all amateur radio operators that, although the satellite may be found in Transponder Mode at times during the commissioning process, it is essential to not transmit to the satellite before it is opened for general use as you may interfere with various tests that need to be performed.

The first image received from the Virginia Tech camera.

With the transponder successfully tested and telemetry values continuing to be nominal, attention turned to the Virginia Tech camera. At about 14:30 UTC, the camera was turned on and quickly returned it’s first image of Earth. On the next pass over North America, the camera was again turned on and several images flowed into AMSAT servers. Images captured and uploaded can be found at http://www.amsat.org/tlm/fox1d/images/

AMSAT plans further testing of the Virginia Tech camera during the early hours of January 14, 2018 (UTC). If not shut off by a command station, the camera remains active for a period of 40 minutes following activation, so the active period may vary depending on when the camera is activated.

January 14, 2018 Camera On Times (Approximate)

The first image of Earth received from the Virginia Tech camera.

01:12 UTC – 01:52 UTC

02:42 UTC – 02:51 UTC

This should provide an opportunity for stations in areas including Russia, China, and Japan to receive pictures from the Virginia Tech camera. Please be sure that FoxTelem’s source is set to “Auto” so you will be able to receive either high-speed frames carrying camera payloads or data under voice (DUV) frames when the satellite is in Safe Mode or Transponder Mode. If using an external audio source for FoxTelem, be sure you are set for a minimum bandwidth of 20 kHz to receive the high-speed data.

Thank you to all stations who have uploaded telemetry data to AMSAT servers. As of 18:00 UTC on January 13, 2018, a total of 90 unique stations have contributed telemetry from AO-92. Continued collection of telemetry data is essential to the commissioning process. AMSAT greatly appreciates the participation of the amateur radio community in collecting telemetry for the Fox-1 satellites.

A view of the curvature of the Earth seen from the Virginia Tech camera. At the top of the image in the middle of the frame, you can see the tip of the satellite’s receive antenna and a piece of the line that held the antenna down prior to deployment.

 

Fox-1D Launched, Designated AMSAT-OSCAR 92

Right on schedule at 03:59 UTC on January 12, 2018, the solid-fueled first stage and ground-lit strap on boosters of the Indian Space Research Organisation (ISRO)’s Polar Satellite Launch Vehicle in its XL configuration (PSLV-XL) ignited and hurtled AMSAT’s Fox-1D CubeSat along with 30 other satellites onboard the PSLV-C40 mission towards a sun-synchronous orbit. The events along the path to orbit happened rapidly. 30 seconds into the flight, the air lit strap on boosters were lit. One minute into the flight, the ground lit strap on boosters separated. Two minutes into flight, first stage separation and second stage ignition were confirmed. Now came a crucial moment. On August 31, 2017, the PSLV-C39 mission was doomed when its payload fairing failed to separate leaving the payload trapped inside the fairing and in a lower than planned orbit. Two minutes and thirty seconds into the flight, the call was heard on the ISRO webstream of the launch: “Payload fairing separation!” The cheers in mission control were audible as the liquid-fueled second stage continued to propel the payloads to orbit. Four minutes into the flight, the second stage separated and the solid-fueled third stage was lit to perform its duty. Seven minutes in, the third stage burned out. After a short coast period, the third stage was discarded and the liquid-fueled fourth stage ignited eight minutes and thirty seconds into the flight. Sixteen minutes and thirty seconds into the flight, the fourth stage shut down, having placed the vehicle into its initial orbit. A minute later, the primary payload, a Cartosat-2 series imaging satellite for the Indian government separated followed by other satellites on the mission. Twenty-seven minutes into the flight, confirmation came that all of the nanosatellites had been deployed. Fox-1D was in orbit!

PSLV-C40, with Fox-1D on board, lifts off! Photo courtesy ISRO

 

1U CubeSats, including Fox-1D, being deployed from PSLV-C40. Video of the launch and deployment can be seen at https://www.isro.gov.in/pslv-c40-cartosat-2-series-satellite-mission/pslv-c40-cartosat-2-series-mission-liftoff-and-onboard

Just before 05:00 UTC, Fox-1D passed over western North America, but the onboard timer that ensures the satellite is clear of the launch vehicle and other satellites on the mission before deploying antennas and transmitting had not yet expired. The AMSAT Engineering team would have to wait a bit longer before confirming the health of the satellite. At about 05:17 UTC, the satellite came to life and its antennas deployed over the North Pole. The AMSAT Engineering team and amateur radio operators worldwide were watching various WebSDRs waiting for signs of life. Around 05:25 UTC, the characteristic “Fox tail” of the Fox-1 FM transmitter was seen on multiple WebSDRs. Fox-1D was alive! While the satellite was alive and transmitting, the reception of telemetry frames was crucial for AMSAT Engineering to determine whether or not the satellite was healthy. At 05:28 UTC, the first frame appeared on the AMSAT telemetry server, uploaded by Anatoly Alexsandrov, UA9UIZ, of Tyazhinskyi, Kemerovo Oblast, Russia. Initial telemetry values confirmed that the satellite was healthy.

The Fox-1 FM transmitter’s characteristic signature, “the Fox Tail” captured on a WebSDR in Russia by W5PFG

 

Initial telemetry values uploaded to the AMSAT server by UA9UIZ

Satellites that achieve orbit and are successfully activated are commonly given an on-orbit name. Ever since the launch of OSCAR I in 1961, it has been traditional for amateur radio satellites to carry the name OSCAR, for “Orbiting Satellite Carrying Amateur Radio.” Amateur radio satellites meeting certain criteria are renamed “OSCAR” with a prefix of the satellite owner’s preference and issued a sequential number after they successfully achieve orbit and are activated. After confirmation of signal reception, OSCAR Number Administrator Bill Tynan, W3XO, sent an email to the AMSAT Board of Directors designating the satellite AMSAT-OSCAR 92. Tynan’s email read:

Fox-1D was launched successfully at 03:59 UTC today, January 12, 2018, from Satish Dhawan Space Centre in Sriharikota, India, and has been received by several amateur stations.

Fox-1D, a 1U CubeSat, is the third of AMSAT’s five Fox-1 CubeSats to reach orbit, being preceded by AO-85 (Fox-1A) and AO-91 (RadFxSat / Fox-1B). Fox-1D carries the Fox-1 U/v FM transponder, with an uplink of 435.350 MHz (67.0 Hz CTCSS) and a downlink of 145.880 MHz. In addition, Fox-1D carries several university experiments, including a MEMS gyro from Pennsylvania State University – Erie, a camera from Virginia Tech, and the University of Iowa’s HERCI (High Energy Radiation CubeSat Instrument) radiation mapping experiment. Fox-1D also carries the AMSAT L-Band Downshifter experiment which enables the FM transponder to be switched to utilize an uplink of 1267.350 MHz (67.0 Hz CTCSS).

Fox-1D was sent aloft as a secondary payload on the Indian Space Research Organisation (ISRO)’s PSLV-XL rocket as part of the PSLV-C40 mission. Fox-1D was one of thirty-one satellites successfully deployed on this launch.

Since Fox-1D has met all of the qualifications necessary to receive an OSCAR number, I, by the authority vested in me by the AMSAT President, do hereby confer on this satellite the designation AMSAT-OSCAR 92 or AO-92. I join amateur radio operators in the U.S. and around the world in wishing AO-92 a long and successful life in both its amateur and scientific missions.

I, along with the rest of the amateur community, congratulate all of the volunteers who worked so diligently to construct, test and prepare for launch the newest amateur radio satellite.

William A. (Bill) Tynan, W3XO
AMSAT-NA OSCAR Number Administrator

AMSAT Engineering reminds stations that the satellite will not be available for general use until the on-orbit checkouts are complete. Please continue to submit telemetry to assist the Engineering team in completing the commissioning process. During commissioning, the transponder may be active at times, but please do not transmit as you may interfere with important tests that must be completed before the satellite is commissioned. The commissioning process is expected to take up to two weeks.

Fox-1D Launched, Initial Telemetry Received

Fox-1D was successfully launched at 03:59 UTC on the PSLV-C40 mission from Satish Dhawan Space Centre in Sriharikota, India. UA9UIZ received and uploaded the first telemetry to AMSAT servers at 05:28 UTC.

The “Fox Tail” of Fox-1D captured on a WebSDR by W5PFG

 

Initial telemetry values uploaded to the AMSAT server by UA9UIZ

Initial telemetry values appear nominal.

The first set of post-launch Keplerian elements are reproduced below:

Fox-1D
1 99934U 1801D    18012.18036412  .00000000  00000-0  00000-0 0    15
2 99934  97.6514  74.0671 0008545 308.1824 275.3575 15.22876478    16

For more information about the commissioning process, please see https://www.amsat.org/getting-ready-for-fox-1d/

Fox-1D Launch Live Blog

The countdown to the launch of PSLV-C40 carrying AMSAT’s Fox-1D satellite is underway! The 28 hour countdown began at 23:59 UTC on January 10, 2018. Fox-1D is scheduled for launch into a sun-synchronous orbit at 03:59 UTC on January 12, 2018 (10:59pm EST on Thursday, January 11th) from Satish Dhawan Space Centre in Sriharikota, India. Further information about the PSLV-C40 mission, including a mission brochure and photo gallery can be found on the Indian Space Research Organisation (ISRO)’s website at https://www.isro.gov.in/launcher/pslv-c40-cartosat-2-series-satellite-mission.

Handy links for tonight are below:

Further information about the Fox-1D satellite and early operations, including preliminary Keplerian elements can be found at https://www.amsat.org/getting-ready-for-fox-1d/.

Fox Telemetry Leaderboard (With links to FoxTelem)
http://www.amsat.org/tlm/

AMSAT Live OSCAR Satellite Status Page (Report Fox-1D reception here)
http://amsat.org/status/

In addition to the live blog, updates will be found on AMSAT’s Twitter account (@AMSAT). Note that you do not need to be a Twitter user to view AMSAT’s tweets.
https://twitter.com/AMSAT

The latest prelaunch Keps can be found in AMSAT’s Keps distribution. Any tracking software using the AMSAT Keps distribution should identify new object “99934” after refreshing your Keps.
http://www.amsat.org/amsat/ftp/keps/current/nasabare.txt

Live video from ISRO will begin at 03:30 UTC