July 1, 2001

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AO-40 Update

Although AO-40 satellite transponders remain off the air, the ATOS propellant feed system tests have been successful and a new orbit has been achieved. According to received telemetry, the ammonia eater, flow-rate controller, valves and pressure indicators all worked successfully.

AMSAT-DL reports the "blowing of cold gas through the arcjet is over". The perigee height raised from 280 km (before outgassing) to 851 km following the tests. Apogee height is unchanged. The good news is that AO-40 is now in a safe and stable orbit!

All of the 53 kg of on-board ammonia appears to have been used during the orbital change. Since orbit 302 the ammonia stopped flowing and the pressure indicators in the received telemetry show no additional pressure.

AMSAT-DL is currently looking over stored telemetry as information continues to be downloaded and analyzed.

The spacecraft attitude will now be moved back to ALON/ALAT 0/0 as soon as possible and command stations are currently preparing for magnetorquing sequences.

Amateur radio satellite station operators around the world noticed the orbital changes immediately, as they looked for AO-40's signal. "Congratulations to the AO-40 command team and thanks for the new safe orbit," said Jim, KK3K.

Stay tuned to ANS, the official source of AO-40 information.

[ANS thanks AMSAT-NA, AMSAT-DL and the ARRL for this information]

JSC Open House

For the sixth consecutive year, NASA's Johnson Space Center will open its doors to the public for its annual Open House event. For one full day, Saturday, August 25th, visitors will have an opportunity to meet JSC's workers, see how they plan and conduct human space flight missions and learn about NASA technologies that are used on Earth every day.

The open house is free to the public.

Exhibits and hardware from JSC's various programs will be featured in more than 19 buildings throughout the center. In addition, tours will be provided of the Sonny Carter Training Facility, where astronauts train for space walks in the largest indoor pool in the world, as well as Ellington Field, where NASA training jets, Shuttle Training Aircraft and several KC-135 weightless trainers are based.

Visitors will also be able to see Mission Control where both the Space Shuttle and International Space Station flight control rooms are operating. This facility is the nerve center for human space flight operations.

For more information about JSC's Open House. see

[ANS thanks NASA 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

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.