[amsat-bb] ANS-004 ANS Special Bulletin: ARISSat-1/KEDR Goes Silent
k9jkm at comcast.net
Wed Jan 4 08:46:01 PST 2012
AMSAT NEWS SERVICE
SB SAT @ AMSAT $ANS-004.01
ANS-004 AMSAT News Service Special Bulletin: ARISSat-1/KEDR Goes Silent
AMSAT News Service Bulletin 004.01
>From AMSAT HQ SILVER SPRING, MD.
January 4, 2012
To All RADIO AMATEURS
Reception reports indicate that ARISSat-1/KEDR has stopped trans-
mitting on Wednesday, January 4, 2012. The last full telemetry
captured and reported to the ARISSatTLM web site at 06:02:14 UTC
on January 4 were received from ground stations as the satellite
passed over Japan.
See: http://www.arissattlm.org/live (full telemetry display)
See: http://www.arissattlm.org/mobile (condensed telemetry)
Telemetry reports showed that the temperature aboard ARISSat-1/KEDR
had been rising as atmospheric drag began to affect the satellite.
Final temperatures received via ARISSatTLM reported this data:
IHU 75 ° C / 167.0 ° F
PSU 76 ° C / 168.8 ° F
RF 88 ° C / 190.4 ° F
Control Panel 61 ° C / 141.8 ° F
Experiment 64 ° C / 147.2 ° F
Stations receiving telemetry from ARISSat-1 at any time over the
last few months, please forward all of your .CSV telemetry files
to telemetry AT arissattlm.org.
Konstantin, RN3ZF sent a reception report of his copy of the 0842 UTC
pass that, "the telemetry was absent, voice messages were not legible,
very silent and interrupted. Most likely, I saw last minutes in the
life of the satellite."
Dee, NB2F reported, "Nothing heard from ARISSat-1/KEDR on any fre-
quency during the first USA pass at 16:00 UTC, January 4."
ARISSat-1/KEDR was deployed from the International Space Station on
August 3, 2011 during during EVA-29 on by Cosmonaut/Flight Engineers
Sergei Volkov and Alexander Samokutyaev.
The satellite carried a student experiment from Kursk State University
in Russia which measured atmospheric density. Students from around the
world provided the voices for the FM voice announcements.
The amateur radio payload aboard ARISSat-1/KEDR achieved many "firsts"
for amateur radio in space:
+ First flight test of AMSAT Software Defined Transponder which trans-
- FM voice downlink cycling between student messages, spoken
telemetry and SSTV from cameras on the spaceframe.
- 16KHz bandwith linear transponder,
- CW beacon with telemetry and callsigns of radio amateurs noting
their significant contributions to amateur radio in space.
- Robust, forward error corrected 1K rate BPSK downlink with sat-
ellite telemetry and Kursk experiment telemetry.
+ Development and release of the ARISSatTLM software for PC and Mac
platforms enabled amateur stations worldwide with reliable reception
of the BPSK telemetry, CW telemetry, display on the station's com-
puter, and automatic upload of received data via the internet to the
ARISSat engineering team.
+ A new Integrated Housekeeping Unit was developed and successfully
+ A new Power Management System was developed and successfully
AMSAT President Barry Baines, WD4ASW noted, ARISSat-1/KEDR marked a
new type of satellite which has captured the attention of the national
space agencies around the world for the unique educational opportunity
we have been able to design, launch, and operate. By designing an edu-
cational mission aligned with NASA's Science, Technology, Engineering,
and Mathematics goals amateur radio operators around the world have
been able enjoy a new satellite in orbit."
ARISSat-1/KEDR Project Manager, Gould Smith, WA4SXM said, "Dozens of
amateur radio volunteers, AMSAT, ARRL, NASA, and Energia teamed up for
this successful mission to bring you the most unique and innovative
amateur radio satellite mission. Congratulations to all who made
[ANS thanks the ARISSat-1/KEDR Team for the above information]
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