BY70-1

Chinese satellites #7: BY70-1

BY70-1
Launch Date: 28 Dec 2016, 03:23 UTC
Launch Site: Taiyuan, China
Launch Vehicle: Long March 2D
Gaojing-1&2 (SuperView-1&2) - CZ-2D - TSLC, LC9

Beijing Bayi School, Chaina
China Center for Aerospace Science and Technology
V/U transponder Up: 145.920MHz / Down: 436.200MHz
Telemetry and JPEG images taken by the camera: 436.200MHz 9600bps BPSK

http://www.chinaspaceflight.com/satellite/BAYIMS/BY70-1.html
http://destevez.net/2016/12/looking-at-by70-1-image-downlink/
http://destevez.net/2016/12/first-data-from-by70-1/
http://jh4xsy.asablo.jp/blog/2016/12/28/8297297
http://twitter.com/cnspaceflight
http://twitter.com/bg2bhc


  


(C)ChinaSpaceflight


BY70-1 heard today

2016-083A used TLE
1 41907U 16083A   16363.24809891 -.00000705  22256-5  00000+0 0  9993
2 41907  97.5819  74.7012 0229687   7.1141 353.3224 15.66601177    03

13:43-13:48 UTC, 28 Dec 2016, Ele 5 SW-W-WN, 436.200MHz USB
http://www.dropbox.com/s/bw8iz7f0j9h1ond/61228by7.wav?dl=0

I confirmed the signal from BY70-1 with a pass of the elevation angle 5 degrees.
On this pass it was sending a signal every 5 seconds. I received it with 436.200
MHz USB, but it might be FM. The visible circle of the satellite is very small.
Therefore this satellite will decay and burn up in the atmosphere soon. (Lower left figure)


BY70-1 FM Transponder

00:52-01:03 UTC, 29 Dec 2016, Ele 26 NE-E-S
V/U transponder Up: 145.920MHz / Down: 436.200MHz 
Telemetry and JPEG images taken by the camera: 436.200MHz 9600bps BPSK

In this morning pass (00:52 UTC), the FM transponder was turned on.
And the "436.200MHz 9600 bps BPSK telemetry" was back every 30 seconds.
This pass had a large visible circle. I think it was close to the perigee. (right figure)

  


Image taken from BY70-1 by BG2BHC
BY70-1 = 41909 2016-083C, 29 Dec 2016

  

http://lilacsat.hit.edu.cn/?p=542
http://twitter.com/bg2bhc/status/814312994653904896


BY70-1 telemetry decode by K4KDR

  


http://github.com/bg2bhc/gr-lilacsat/
http://jh4xsy.asablo.jp/blog/2017/01/06/8305912
http://jh4xsy.asablo.jp/blog/2017/01/28/8338992
http://gist.github.com/K4KDR/66204745366819b77f367c5dcd4c8339
http://destevez.net/2017/01/coding-for-hit-satellites-and-other-ccsds-satellites/