Telemetry

The telemetry portion of the beacon contains a comma-separated list of text values of selected housekeeping parameters. The parameter values are already calibrated to SI units and only require minimal conversion or interpretation.

 Parameters (one per cell)UnitFormatExamples   
ValueMeaning
TimeOn-board time counter Relative to spacecraft epoch of:
2016-01-01 at 00:00:00
2EE-16s0xhhhhh hhhhhhh0x05723B DC59CB5988188707275 ticks
-> 91372508.351s
-> 2018-11-23
13:15:08.351
Analog measurementsVoltageVd.ddd3.2423.242 V
CurrentmAddd264
86
264 mA
86 mA
TemperatureC[-]dd28
-4
28 C
-4 C
RF measurementsRSSIdBm-ddd-67
-103
-67 dBm
-103 dBm
AFCHz[-]ddddd-31390
8170
-31390 Hz
8170 Hz
Link SettingsTransfer Layer idle frames Downlink Reed-Solomon Downlink randomizer Downlink convolutional Uplink BCH
Uplink derandomizer
n/a0xhh
i.e. 1 byte bit field in hexadecimal form, idle frames is
MSB.
0xEC0b11101100
All enabled except convolutional

Message example, using first example of each parameter:

$HK,0x05723BDC59CB,3.242,264,28,-67,-31390,0xEC*

Ranging principles