Observation 963693: Swiatowid (44426)

Satellites & Observations Observations
1

Regarding Observation 963693 …

Hi !

With linux soundmodem i get this:

Blockquote
ax0: fm SR6SAT-6 to APDST4-6 via WIDE1-1 WIDE2-1 ctl UI pid=F0(Text) len 17 19:18:52
=CU;PIC_READY;OK
ax0: fm SR6SAT-6 to APDST4-6 via WIDE1-1 WIDE2-1 ctl UI pid=F0(Text) len 39 19:18:58
=EM;MN;12346;12951;19;214;2750;31;3998
ax0: fm SR6SAT-6 to APDST4-6 via WIDE1-1 WIDE2-1 ctl UI pid=F0(Text) len 36 19:18:58
=ER;MN;12347;13887;8;78;950;31;3998
ax0: fm SR6SAT-6 to APDST4-6 via WIDE1-1 WIDE2-1 ctl UI pid=F0(Text) len 41 19:18:59
=M1;STS;00000000000000001111100000001000
ax0: fm SR6SAT-6 to APDST4-6 via WIDE1-1 WIDE2-1 ctl UI pid=F0(Text) len 38 19:19:00
=M1;LOG;1567057412;68;5127388;3316;16
ax0: fm SR6SAT-6 to APDST4-6 via WIDE1-1 WIDE2-1 ctl UI pid=F0(Text) len 48 19:19:01
=EM;LOG;1567057412;68;12297;278;3377;9211;20762
ax0: fm SR6SAT-6 to APDST4-6 via WIDE1-1 WIDE2-1 ctl UI pid=F0(Text) len 43 19:19:02
=ER;LOG;1567057413;68;12365;5;29;475;20762
ax0: fm SR6SAT-6 to APDST4-6 via WIDE1-1 WIDE2-1 ctl UI pid=F0(Text) len 35 19:19:02
=U1;RL;1567057413,3289;12876;23;21
ax0: fm SR6SAT-6 to APDST4-6 via WIDE1-1 WIDE2-1 ctl UI pid=F0(Text) len 29 19:19:03
=U1;MS;1567057413;56;189;232
ax0: fm SR6SAT-6 to APDST4-6 via WIDE1-1 WIDE2-1 ctl UI pid=F0(Text) len 35 19:19:04
=U2;RL;1567057411,3267;12733;23;29
ax0: fm SR6SAT-6 to APDST4-6 via WIDE1-1 WIDE2-1 ctl UI pid=F0(Text) len 28 19:19:04
=U2;MS;1567057411;58;55;-29
ax0: fm SR6SAT-6 to APDST4-6 via WIDE1-1 WIDE2-1 ctl UI pid=F0(Text) len 33 19:19:05
=CU;LOG;1567057413;3256;28852;31
ax0: fm SR6SAT-6 to APDST4-6 via WIDE1-1 WIDE2-1 ctl UI pid=F0(Text) len 46 19:19:06
=CU;MTA;1567057407;OK;97204;500;2;1674;288580
ax0: fm SR6SAT-6 to APDST4-6 via WIDE1-1 WIDE2-1 ctl UI pid=F0(Text) len 25 19:19:07
=CU;STS;0000000000011111
ax0: fm SR6SAT-6 to APDST4-6 via WIDE1-1 WIDE2-1 ctl UI pid=F0(Text) len 19 19:19:14
=IMC ACK OK;4;1050
Blockquote

Why does this not decode in gr-satnogs?

And does this mean, that there’s a picture. But transmission seams to short for this.

Have a nice evening!

73 Oliver

2

Ok i think i have an answer.

@EA4GPZ has a tweet about it.

I think i have to learn how to use the dev-branch. Is there a HOWTO how to set this up?

73 Oliver

3

Sri, forgot the link to the tweet:

73 Oliver

4

Hi Oliver,

Sorry, but my post has nothing to do with this observation. Światowid transmits two different kinds of data: 1k2 APRS and 9k6 FSK with a custom protocol. The APRS is used for telemetry with the text messages you show above. The 9k6 FSK is used for image data.

This observation has only APRS data. Any APRS decoder should be able to decode it. I’m not sure why gr-satnogs gives problems. I’ve had successful results with gr-satellites and direwolf.

This other observation has both APRS packets and 9k6 packets. The difference is visible in the waterfall. 9k6 packets are longer and the spectrum looks more “uniform” (APRS’s spectrum shows a certain pattern).

1 Like
5

Hi Daniel!

Many thanks for the explanation. Now i understand.

73 Oliver