Soyuz-2.1b / Fregat Vostochny launch 2023-06-27 11:34 UTC

TLE’s for pocketcubes

2023-091AW              
1 57322U 23091AW  23197.18220870  .00007406  00000+0  54719-3 0  9999
2 57322  97.6619 247.7128 0018878 182.6122 177.5008 15.03378093   674
2023-091AX              
1 57323U 23091AX  23197.18228004  .00005744  00000+0  42584-3 0  9997
2 57323  97.6623 247.7119 0018938 182.3528 177.7611 15.03348246   673
2023-091AY              
1 57324U 23091AY  23196.71643263  .00009033  00000+0  66706-3 0  9991
2 57324  97.6628 247.2505 0019060 183.4747 176.6349 15.03328152   608
2023-091AZ              
1 57325U 23091AZ  23197.18232063  .00010942  00000+0  80602-3 0  9998
2 57325  97.6618 247.7127 0018979 182.1135 178.0013 15.03366632   674
2023-091BA              
1 57326U 23091BA  23197.18228995  .00005682  00000+0  42131-3 0  9998
2 57326  97.6624 247.7122 0018906 182.4220 177.6917 15.03344346   514
2023-091BB              
1 57327U 23091BB  23197.18224620  .00007712  00000+0  56969-3 0  9990
2 57327  97.6624 247.7115 0018945 182.3657 177.7482 15.03369254   516
2 Likes

Any suggestion which object should be assigned to which satellite?

Regarding the 2FSK mode that is transmitted in an alternating pattern from the StratoSat Pico sats, today I finally constructed reliable decoders on both the Arduino & GNU Radio platforms.

No doubt there is room for improvement to both efforts!

If anyone would like a GNU Radio starting point (plus test audio & I/Q files), my tweet w/ screen shots is at

https://twitter.com/scott23192/status/1680675916815425537

… and the files mentioned are at

https://www.qsl.net/k/k4kdr//grc/stratosat-fsk/

-Scott, K4KDR

6 Likes

It appears that this satellite is not functioning.

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Is there any information about your satellite? We see no transmission 437.4 mhz from object 57173

satellite is operating, beacon off to save power

1 Like

This is a recording of our satellite’s responses during a communication session from our ground station in Samara
https://network.satnogs.org/observations/7953945/

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Going through a 48 hours STRF observation I found what looks to be a 9600 baud FSK signal on 436.498 MHz.

By using multiple single bursts over an eight hour period these frames seem to match object 57179 which is currently followed by PHI-DEMO

Looking at the observation, it seems the satellite only send a single frame every 2 minutes.

3 Likes

It seems Norby-2

изображение

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Thanks for the information.

Using NORBY-2 TLE with this observation we get the following match

The TLE are very close to one another, and nice to know that NORBY-2 also transmits FSK AX.25

4 Likes

Just like the original NORBY, NORBY-2 alternates (1 downlink per minute) between FSK & LoRa. Here is a LoRa downlink from 7-Aug:

… it seems that a rotation between multiple modes is becoming more and more common on satellites as the flight radios & on-board computers become more complex & add capabilities.

3 Likes