Recent update: TLE info can be found here.
Frequency: 437.2 MHz
Modulation: 9600 bps GMSK
Polarisation: Circular
Beacon frame is transmitted every 10 seconds
Transmit power: 1W
Beacon Frame
Notes: To decode, the bit stream should be NRZS decoded, then descrambled (G3RUH), then bit stuffing removed as per the AX.25 protocol. A summary of these can be found in: Communications Infrastructure for the MOST Microsatellite Project (Laura Halliday 2000).
Satellite Data
The table below contains the satellite data (mostly sensor readings) in order. The decode method refers to functions given in the python script below to demonstrate the scaling used for each field.
FIELDUNITBYTESDECODE METHODTxCount1_uint8_from_bytesRxCount1_uint8_from_bytesRxValid1_uint8_from_bytesPayloadType1_uint8_from_bytesComOutI1A2_decode_currentComOutV1V2_decode_voltageComOutI2A2_decode_currentComOutV2V2_decode_voltageComT2°C2_decode_tempEpsAdcBatV1V2_decode_voltageEpsLoadI1A2_decode_currentEpsAdcBatV2V2_decode_voltageEpsBoostInI2A2_decode_currentEpsRail1V2_decode_voltageEpsRail2V2_decode_voltageEpsTopPanelVV2_decode_voltageEpsTopPanelIA2_decode_currentEpsT1°C2_decode_tempEpsT2°C2_decode_tempXPosVV2_decode_voltageXPosIA2_decode_currentXPosT1°C2_decode_tempYPosVV2_decode_voltageYPosIA2_decode_currentYPosT1°C2_decode_voltageXNegVV2_decode_currentXNegIA2_decode_tempXNegT1°C2_decode_voltageYNegVV2_decode_currentYNegIA2_decode_tempYNegT1°C2_decode_voltageZNegVV2_decode_currentZNegIA2_decode_voltageZNegT1°C2_decode_currentZPosT°C2_decode_tempCdhTime8_uint64_from_bytesSwCdhLastReboot8_uint64_from_bytesSwSequence2_uint16_from_bytesOutreachMessage48_decode_str
Recent update: To see how the sensors readings are interpreted, see the code at https://melbournespace.com.au/static/sensors.py