Communication between satellite and earth

Downlink
Table1　Transmittion chracteristics of WASEDA-SAT3

Sample of beacon WMA file

How to read CW telemetry data from WASEDA-SAT3

CW telemetry data includes

“WSS0000C0000B0000X0000Y0000Z0000”

Each data means
①WS
　Name of satellite
　Its source is our satellite name (W)ASADA-(S)AT3

②S0000
　Time after reset[s]
　It means satellite inside clock

③C0000
　Voltage of battery
　C:Charging/D:Not charging + 0.000[V]

④B0000
　Color of LCD and Voltage of thermistor
　(B:Black/W:White + Voltage of thermistor for thermal control located by LCD 0.000[V])

⑤X0000Y0000Z0000
　value of compass（X,Y,Z axis(each 4 value, modulus, 0.000[gauss]))

For example, if telemetry is

WSS1028D4004W3800X1000Y0100Z0010

It can be devided to

WS/S1028/D4004/W3800/X1000/Y0100/Z0010

And it means

　WS:WASEDA-SAT3
　S1028:Time passed 1028 seconds after reset.
　D4004:Not charging and battery voltage is 4.004[V].
　W3800:LCD color is white and thermistor voltage is 3.800[V].
　X1000/Y0100/Z0010:Value of compass is (X,Y,Z)=(1.000,0.100,0.010)[gauss]

Used software

　AGW Term， AGW PE

Configuration of software

　・AGW Term
Terminal software

・AGW PE
Packet engine



Tnc　setup
Select port
Select sound card in TncType



Tnc commands
Select Let me control Parameters
Click Default1200. Parameters set automatically.

How to decode picture

Downloading manual of decode (pdf)
Downloading of decode software (zip)