RS-21 CW telemetry format
RS-21 Telemetry decode format
CW telemetry from RS-21 microsatellite
Index Possible Decoding Assignment of
Name limits parameters parameters
----- ----------- ------------ ----------------
RS21 The callsign
UBS N=100...150 U=N/10 Volts On board voltage
IBS N= 10...250 I=N/100 Ampers On board current
USUN N= 0...156 U=N/10 Volts Charge voltage from solar battery
ISUN N= 0...255 I=N/100 Ampers Charge current from solar battery
ITXA N= 0...170 I=N/100 Ampers D.C. current of the 435 MHz TX
PTXA N= 0... 70 P=N/10 Watts UHF power of the 435 MHz TX
TTXA N= 50...150 T=N-78 degrees The temperature of the 435 MHz TX
ITXB N= 0...150 I=N/100 Ampers D.C. current of the 145MHz TX
PTXB N= 0... 70 P=N/10 Watts VHF power of the 145MHz TX
TTXB N= 50...150 T=N-78 degrees The temperature of the 145MHz TX
TFLV N= 30...180 T=N-78 degrees The temperature of the top flange
TFLN N= 30...180 T=N-78 degrees The temperature of the bottom flange
TPPA N= 50...150 T=N-78 degrees The temperature of the inst. A board
TPPB N= 50...150 T=N-78 degrees The temperature of the inst. B board
MTX N= 0...255 TX modes table The housekeeping information
MRX N= 0...255 RX modes table The housekeeping information
RS21 The callsign
Site last updated April 2002
&#copy (2002) MAREX-NA
http://www.marex-na.org/fileshtml/rs21sat.html
I confirmed today RS-21 CW telemetry at 05:52:00 - 06:01:00 UTC, and
07:27:00 - 07:32:00 UTC, 28 Apr, 2002
MTX 51 ... The information of the TX modes
MRX 32 ... The information of the RX modes
RS 21 ... The callsign
UBS 135 ... On board voltage 13.5 [V]
IBS 20 ... On board current 0.2 [A]
USUN 140 ... Charge voltage from solar battery 14.0 [V]
ISUN 36 ... Charge current from solar battery 0.36 [A]
ITXA 9 ... D.C. current of the 435 MHz TX 0.09 [A]
PTXA 0 ... UHF power of the 435 MHz TX 0 [W]
TTXA 139 ... The temperature of the 435 MHz TX 61 [C] ?
ITXB 0 ... D.C. current of the 145MHz TX 0 [A]
PTXB 0 ... VHF power of the 145MHz TX 0 [W]
TTXB 137 ... The temperature of the 145MHz TX 59 [C] ?
TFLV 134 ... The temperature of the top flange 56 [C] ?
TFLN 146 ... The temperature of the bottom flange 68 [C] ?
Maybe the center frequency of RS-21 is transmitted at 435.340MHz.
Now it is flying at an altitude of about 280km or 290km.
And I heard CW telemetry from RS-21 at about 145.823MHz,
02:24:00-02:30:00 and 03:56:00-04:03:00 UTC in 2 May, 2002.
USUN 129 ... Charge voltage from solar battery 12.9 [V]
ISUN 38 ... Charge current from solar battery 0.38 [A]
ITXA 0 ... D.C. current of the 435 MHz TX 0 [A]
PTXA 0 ... UHF power of the 435 MHz TX 0 [W]
TTXA 131 ... The temperature of the 435 MHz TX 53 [C]
ITXB 3 ... D.C. current of the 145MHz TX 0.03 [A]
PTXB 0 ... VHF power of the 145MHz TX 0 [W]
TTXB 132 ... The temperature of the 145MHz TX 54 [C]
And I posted a wave file on the following web.
[185 secs, 4M bytes]
http://www.ne.jp/asahi/hamradio/je9pel/20502r21.zip
http://www.ne.jp/asahi/hamradio/je9pel/20502r21.wav
Now she is flying at an altitude of about 240km.
See for "RS-21 Telemetry decode format",
http://www.marex-na.org/fileshtml/rs21sat.html
Date: Sat, 04 May 2002 19:10:17 +1000
From: Graham James Hughes
To: amsat-bb@amsat.org
Subject: [amsat-bb:58337] Flight of RS-21 ended
-- The following message from Alex Papkov at Kaluga Ground Control is
confirmation that RS-21 has re-entered:
"Trajectory calculation of lowering of the microsatellite on the last
navigation datas gives its atmospheric entry of the Earth on orbit 711,
approximately at 2300(UT) above Pacific Ocean near to shores of the American
continent.
The microsatellite "Kolibri-2000" with call sign RS-21 successfully has
completed the operation and has stopped physical existence."
We consider all aspects of this mission to have been a success.
Collaboration between Australian high school students, Russian Space
scientists and Russian high school students has been a highlight for me.
It has been a great adventure.
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