February 24, 2002

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New ISS Packet System Working

AMSAT-NA's Frank Bauer, KA3HDO, informed ANS that normal packet activity has resumed aboard the International Space Station.

The ISS crew upgraded the old system with a new packet module that was originally sent into space on the STS-105 Discovery mission. The old system, crippled with a dead backup battery for RAM, had been operating in a digipeat mode using the NOCALL call sign and other ROM defaults.

The new module, using the callsign RS0ISS, is using a specially developed ROM set with standard ISS defaults, a new battery and an extended memory.

Although the mailbox function has been activated, ground stations are discouraged from using it. Currently, there is no computer hooked up to the packet system; also, the crew will be much too busy to respond to individual messages posted there.

Frequencies will remain the same: uplink on 145.990 MHz; downlink on 145.800 MHz.

The installation and checkout of the packet module resulted from a team effort between the Russian team (led by Sergei Samburov, RV3DR) and the U.S. team. During the past month, the team developed a set of crew procedures that were reviewed and approved by specialists at both Energia and NASA.

[ANS thanks the ARISS group for this information]

ARRL and TAPR Call for Papers

Technical papers are solicited for presentation at the 21st Annual ARRL and TAPR Digital Communications Conference to be held this September in Denver, Colorado.

Presentations will also be publicized in the Conference Proceedings, published by the ARRL. Presentation at the conference is not required for publication in the Proceedings document.

Submission of papers is due by August 5th, 2002.

The ARRL and TAPR Digital Communications Conference is an international forum for radio amateurs to meet, publish their work, and present new ideas and techniques. Software defined radio, digital voice and digital satellite communications, global positioning systems, APRS, DSP, TCP/IP networking and AX.25 and other wireless networking protocols are just some of the topics that will be covered.

Conference registration and additional details are available at

[ANS thanks the ARRL and TAPR for this information]

RS-12/13 Mode Changes

Kevin, AC5DK, and Jerry, K5OE, confirmed to ANS that as of 02:30 UTC on February 19th, RS-12 was commanded from Mode A to Mode K. K5OE also noted that RS-13 was apparently activated in Mode-T at the same time.

Ray, W2RS, confirmed RS-13's Mode T status, enjoying a CW QSO with Brent, VE5SWL. In addition, W2RS reports the Mode K downlink from RS-12 "was so loud that I could hear myself without a receiving antenna!" It is interesting to note the record for the longest-distance satellite QSO (between the United Kingdom and New Zealand) is held via RS-12 in Mode K.

W2RS also reported that RS-12's Mode K transponder is currently operating with a 10 dB uplink attenuation and a power output of 0.6W, according to received telemetry.

Alex Kochetkoff, UA0LMC, of Vladivostok, Russia reported to ANS that RS-12's Mode K uplink is 21.210-21.250 MHz, with a downlink of 29.410-29.450 MHz. The beacon is at 29.408 MHz, and the robot at 29.454 MHz. RS-13's (Mode T) uplink is between 21.260-21.300 MHz, with a 145.860-145.900 MHz downlink. The beacon is at 145.859 MHz and the robot at 145.908 MHz.

RS-12 and RS-13 (on the same platform) was launched on February 5, 1991 aboard a Russian Cosmos C launcher. RS-12/13 is celebrating 11 years in space!

The latest information on RS-12 and RS-13 can be found on the AC5DK RS-12/13 Satellite Operators page at

[ANS thanks AC5DK, K5OE, W2RS and UA0LMC for this information]

ANS in Brief

ANS news in brief this week includes the following:

Weekly Satellite Report

Link to the weekly report on satellite ...

All Satellites
ISS . RS-12 . RS-13 . RS-15 . AO-10 . UO-11 . UO-14 . AO-16 . DO-17 . WO-18 . LO-19 . FO-20 . UO-22 . KO-23 . KO-25 . IO-26 . AO-27 . FO-29 . TO-31 . GO-32 . SO-33 . PO-34 . SO-35 . UO-36 . AO-40 . SO-41 . SO-42 . NO-44

Please send any amateur satellite news or reports to the ANS Editors at, or to ANS Editor Dan James, NN0DJ, at

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This week's AMSAT News Service bulletins were edited by AMSAT  News Service editor Dan James, NN0DJ.