partial images recovered:
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Oh nice capture! Its working!! I’ll have to check my observations. What are you using for antenna and SDR?
This is not my observation - from my station. I noticed in one observation that there is a lot of decoded data and I discovered JFIF among them.
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I’ve created a GNU Radio decoder to extract images out of an audio record and to save them directly as .jpg files.
marina_image_decoder.zip (531.3 KB)
It works perfectly for the above mentioned observation.
Just download the audio file and play it while the flowgraph is running.
Before playing another area of the audio file holding image data (in the screenshot above it’s right at the beginning), stop the flowgraph, rename the image file and start the decoder again.
Have fun
Daniel
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thank you! super!
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Thank you very much!
Decoded the image from observation #14504799 successfully with GNU Radio decoder.
Decoded image:
I hope they’ll transmit above my GS in the future 
Also congrats for the Marina team!!
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New nightly version 0.3.15 of SatsDecoder
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This decoder is even better!
I guess it puts the missing parts from the first bundle out of the second bundle into the correct jpg order.
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Yes, since the Merge mode is enabled.
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Which SoundModem are you using to send the audio to Sat Decoder?
Marina transmits in regular 9k6 FSK G3RUH.
Thanks. That’s for the telemetry, which I am receiving fine. I’m curious about the image transmissions. In the above example, audio that has been captured is being decode by Sat Decoder. What is used to send the audio (?) to Sat Decoder? Or can that version of Sat Decoder work directly with audio?
The “Decode” in “Sat Decoder” refers to the decoding of an already by a modem decoded audio stream to get useful data e. g. an image out of the hex data.
So the audio with image data has to be decoded by a modem which provides a KISS or AGWPE server (e. g. UZ7HO’s SoundModem or Direwolf) to handover the decoded data to another application like Sat Decoder (as it is done in the screenshot above).
That’s what I can’t see in the video. I just watch what sounds like WFM or FMD audio and an image being decoded.
I have attempted to play that audio though a VAC to HS_Soundmodem V0.27 running FSK G3RUH but haven’t had any success. I do copy data live off air thru the same setup. Just now Marina went over. Needs some fine tuning to be 100%.
Is the correct version?
Understood.
Maybe it’s a strong audio compression in the video.
Just play the original audio file from the corresponding observation.