Satnogs-setup Advanced Settings

SatNOGS Software
1

Hi All,

  1. In the advanced satnogs settings, there’s a place to add a script here:
    SATNOGS_POST_OBSERVATION_SCRIPT

Is this a path to add some python such as a personal decoder?
Or maybe auto-transfer and delete an IQ file?

  1. If I want to change the .grc for a given receiver to fix some frequency offsets (like ESEO’s 3-4 kHz) - how does one do that? I didn’t want to overwrite the .py in /usr/bin.

Soon, I’ll know enough to answer questions :wink: 73s Chris

2

If the satellite has drifted in frequency it needs to be updated in the database. Usually, we add a new transmitter with “drifting” in the name.

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3

Thanks Alex - I’ve made the suggestion in the db.

Just to reiterate, how would one add a new .grc / .py file?

And what’s the args/docs for the SATNOGS_POST_OBSERVATION_SCRIPT in satnogs-setup?

FYI @EA4GPZ has released an ESEO decoder in gr-satellites - everyone should try it :wink:

4

Gave it a shot in: https://network.satnogs.org/observations/361946/
Need to now figure out how to debug the steps “after something doesn’t work”

73s C

5

For SatNOGS these are in the gr-satnogs repo, in the apps/flowgraphs directory. @surligas is the main coordinator for that tree, and you may want to reach out before putting too much work into gr-satnogs as I know there are big changes coming.

Cheers!!

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6

Ta @cshields!
@surligas - got any comment on what’s to come?
And when to think of new decoders?
73s C

7

Sorry for the delay. If you like to contribute back a decoder please make a merge request at the gr-satnogs module. There are available information and a base flowgraph at the https://gitlab.com/librespacefoundation/satnogs/gr-satnogs/tree/master/apps/flowgraphs

Regarding the offset, currently the process is to store this offset at the SatNOGS DB as @csete mentioned. I will add an option to the next release for such a case, because other users asked for it too.

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8

That’s perfect - I can follow this nps. But will the contribution guide / interface change?

@cshields gave the impression that I should hold back as there’s changes afoot!

RE: Offsets, that would be good to have a ‘pass specific’ option rather than it being a db thing. Esp. on new satellites or when TLEs / oscillators are not settled.

Thanks in advance.

73s Chris

9

Well as the sats freq drifts normally the drift transponder in DB is changed to reflect it.

10

the changes I’m thinking of would be a shift from osmosdr to soapy, which for your script should end up being just a block change when that time comes…

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11

@cshields @surligas - Hi Gents, I followed the linked page, created an appropriate gr-satnogs decoder, and added it to my build (replacing satnogs_msk_ax25.py in the settings.py).

1/ Is it as simple as adding the appropriate decoder .py file? Any other network/db settings required?

2/ Need to figure out how to debug said flow graph - find out what’s falling over. Any ideas?

73s Chris

satnogs_eseo_ax25ish.py.txt (17.9 KB)

12

There is a dependency between the satnogsclient and gr-satnogs. All you have to do is to contribute your flowgraph at the gr-satnogs and we will take care of the changes that they have to be done.

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13

Rgr that - I’ll clone and add it to gitlab.

Is this process documented anywhere on the client changes?

I’d like to be able to test locally.

Best, Chris