The image above (from the heavens-above.com prediction site) shows a similar pass and illustrates the reception window which is just less than 8 minutes. Each frame of telemetry takes around 2.5 minutes to receive, so I was extremely happy with the results.
Again I recorded the pass using SDR-Radio and played back the doppler corrected IQ file later decoding with the MRP40 program, hear is a small video demonstrating the decoding process.
and this was the resulting telemetry data when run through the analyser program (see previous post).
--------------------------------------- FITSAT-1 NIWAKA Downlink CW Code --------------------------------------- Input Data------------------ S1 :f00501bb S2 :88db0101 S3 :02000102 S4 :1e20201f S5 :1a12aae7 -------S1------ S-mater of 437MHz RX :4.69[V] Total Voltage of Solar cells :0.1[V] Total Current of Solar Cells :0[mA] Voltage of single cell battery :3.65[V] -------S2------ Current of single cell battery :1054.69[mA] Voltage of 3 series battery :12.83[V] Current of 3 series battery :0[mA] Voltage of 2.5V reference :0.02[V] -------S3------ Voltage of Solar cell + X :0.07[V] Voltage of Solar cell + Y :0[V] Voltage of Solar cell - X :0.04[V] Voltage of Solar cell - Y :0.07[V] -------S4------ Temperature of 3 series battery :2.73[℃] Temperature of single cell battery :6.25[℃] Temperature of +Z side :6.25[℃] Temperature of –Z side :4.49[℃] -------S5------ S-meter of 1.2GHz RX :0.46[V] ------Timestamp----- 14day 3hour 49min 59sec
I have also uploaded a better recording of the audio.
FITSAT-1 CW Telemetry by nerdsville
No comments:
Post a Comment