Category: Telemetry

437.485MHz 9k6 FSK. #airspy Mini, 2*13el Vårgårda YAGI, SDR-Console V3.

This weekend I had the opportunity to listen to the satellite InflateSail as it spent its last days in space. I was able to receive one of the final passes in the evening 2:rd of september (2017).

I used the follwing hardware:

• 2 x 13 el Vårgårda Yagi with RHCP polarisation.
• Alfaspid RAS rotor.
• Airspy Mini

And a lot of software:

• SDR Console V3 with integrated satellite tracking and doppler correction.
• Soundmodem 0.98b with 1k2 BPSK G3RUH.
• Online Telemetry Forwarder (DK3WN)
• KISSDump+ (DK3WN)
• InflateSail telemetry decoder (DK3WN)

This is a picture during the satellit pass (click for full res):

In this is the last decode of telemetry:

With new 2*13 el yagis I can RX all pass without any problem.

My first RX from CAS-4A. Very strong 4k8 GMSK at 145.836 MHz. Telemetry “Mode 7 Testmode”.

74 frames RX in 6 minutes with #airspy and fixed Crossed Dipole!