Stratosat-TK1 (RS52S) image transmissions

2024-05-15 21:11utc
2024-05-15 21.11 RS52 - DL7NDR

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2024-05-16 17:27:40 UTC…

2024-05-16_17-27-40z

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2024-05-16 19:01utc
2024-05-16 19.01 RS52 - DL7NDR

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I have been on and off this satellite for a couple of months. Its either to weak or its not transmitting during the pass.

I have gotten some decent signal strengths however the decoder wont start. And i know i got the decoder right as i have downloaded other peoples basebands and run it through SDR++ with the decoder running in the background and it decoded without problem.

Am i right in assuming that you need a really strong signal in the beginning of this transmission to get the decoder to start? So its not like a SSTV transmission where you pretty much can jump in whenever you want?

Jomjom79

For one transmission it is true. As image have jpg header in the beginning of a transmission, which is critical to conduct an image. That why it transmit image multiple times to higher a chance of receiving header and other packets

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Just provide us a FM demodulated mono record from one of the image transmits (1 minute) with a strong signal of your pass and we can have a look on it.

2024-05-17 17:15:39 UTC…

2024-05-17_17-15-39z

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2024-05-17 18:47:39 UTC…

STRATOSAT_2024-05-17_18-47-39z,734973

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Gulf of Finland and Lake Ladoga. (area in red rectangle ~ 800 x 500 km²)


Google Earth

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2024-05-18 18:41 utc
2024-05-18 18.41 RS52S - DL7NDR

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Image transmissions on 24th - 26th

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2024-05-25 08:20 utc
2024-05-25 08.20 RS52S - DL7NDR

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2024-05-25 09:5x utc
2024-05-25 09.5x RS52S - DL7NDR

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2024-05-25 19:04 utc
2024-05-25 19.04 RS52S - DL7NDR

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2024-05-26 08:04:29 UTC
Image

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2024-05-26 09:4x utc
2024-05-26 09.4x RS52S - DL7NDR

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where can I find transmission schedules? I used to record the basebands everyday but it never transmitted over Portugal so I gave up on it

I will try to add some transmissions over Portugal next time! And post schedule here.

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This satellite is very elusive… I see it transmitting on passes that are too bad for decoding and whenever i get a good pass it does not send at all. Its almost like its a conspiracy against me :grinning:

Is it turned off at certain times during the day? The only passes where i actually have the time to sit down and receive it is late in the evening after 20:00 UTC.

Same here, LOL