[amsat-bb] ISS Crossband Repeater - 9k6 APRS?

Mark Jessop vk5qi at rfhead.net
Fri Sep 4 04:28:53 UTC 2020


After noticing that a SatNOGS station (through a fluke of configuration)
had decoded a packet [1] on the new repeater downlink frequency, I
investigated a bit more and found that all the passes observed recently had
9k6 FSK packet traffic on the downlink.

An example packet:
[0.4] NA1SS>0P0PS4,APRSAT:'v&<0x1c>l <0x1c>SI]ARISS-ISS PM2=<0x0d>
------
U frame UI: p/f=0, No layer 3 protocol implemented., length = 48
 dest    0P0PS4  0 c/r=0 res=3 last=0
 source  NA1SS   0 c/r=1 res=3 last=0
 digi 1  APRSAT  0   h=0 res=3 last=1
  000:  60 a0 60 a0 a6 68 60 9c 82 62 a6 a6 40 e0 82 a0  `.`..h`..b.. at ...
  010:  a4 a6 82 a8 61 03 f0 27 76 26 1c 6c 20 1c 53 49  ....a..'v&.l .SI
  020:  5d 41 52 49 53 53 2d 49 53 53 20 50 4d 32 3d 0d  ]ARISS-ISS PM2=.
------
Is this being generated within the new Kenwood radio, or somewhere else?
What does the packet contain? (It looks like there might be some telemetry
in there?)

73
Mark VK5QI

[1] https://network.satnogs.org/observations/2780486/


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