CubeSats

COMPASS-1 Beacon Decoder

00:49:45UTC, 9 May 2008, 437.275MHz
Received by JA6PL, and decoded by JE9PEL

COMPASS FF 00 00 07 24 00 00 10 90 61 D6 00 FF




http://www.raumfahrt.fh-aachen.de/downloads/COMPASS_Beacon_Decoder.exe


The following picture is indicated the decoded Date/Time by the program,
'Simple COMPASS-1 CW Telemetry Decoder' (developped by DK3WN)



http://www.dk3wn.info/files/compass.zip


10.05.2008 08:26UTC    FF000007240000109061D600FF

Solar Cell Voltage     5.00 V
Solar Panel 1 Cur      0.00 mA
Solar Panel 2 Cur      0.00 mA
Solar Panel 3 Cur      43.92 mA
Solar Panel 4 Cur      225.88 mA
Solar Panel 5 Cur      0.00 mA
EPS Reset Counter      0
Power Level            Low Battery Capacity
Heater Active          Battery Heater OFF
Power Safe Counter     144
Emergency Mode Counter 97
Battery Voltage        4.20 V
Battery Current        0.00 mA
Battery Temperature    -1 C
-----------------------------------------------------------------

COMPASS-1 received over Japan

JE9PEL received at 11:40:00UTC(night), 14 May 2008  WAV 60 seconds

COMPASS 29 00 00 00 00 00 00 00 90 61 CC 16 03

14.05.2008 12:19UTC    29000000000000009061CC1603

Solar Cell Voltage     0.80 V
Solar Panel 1 Cur      0.00 mA
Solar Panel 2 Cur      0.00 mA
Solar Panel 3 Cur      0.00 mA
Solar Panel 4 Cur      0.00 mA
Solar Panel 5 Cur      0.00 mA
EPS Reset Counter      0
Power Level            Battery Capacity OK
Heater Active          Battery Heater OFF
Power Safe Counter     144
Emergency Mode Counter 97
Battery Voltage        4.00 V
Battery Current        138.04 mA
Battery Temperature    3 C
-----------------------------------------------------------------

COMPASS-1 CW equations

http://www.raumfahrt.fh-aachen.de/downloads/beacon.pdf

COMPASS AABBBBBBBBBBCCDEFFGGHHIIJJ

AA           Solar Cells Voltage        N * 5/255         [Volts]
BBBBBBBBBB   Solar Panel 1..5 Current   N * 1.6/255*1000  [mA]
CC           EPS reset counter
D            Power Level
                0 = Battery Caacity OK
                1 = Low Battery Capacity
                2 = Critical Battery Capacity
                3 = Battery Charging
E            Heater Active
                0 = Heater OFF
                1 = Heater ON
FF           Powersafe Counter
GG           Emergency Mode Counter
HH           Battery Voltage            N * 5/255         [Volts]
II           Battery Current            N * 1.6/255*1000  [mA]
JJ           Battery Temperature                          [C]
-----------------------------------------------------------------

COMPASS-1 emergency mode
ONLINE_COMPASS