Stratosat-TK1 (RS52S) image transmissions

[geoscan]

There are images transmitted from Stratosat-TK1 (RS52S) cubesat on 435.870 MHz.

Satellite have two cameras: UCAM-III (same as on Geoscan-Edelveis) and high resolution camera. So there are two formats of image transmission.

Format of UCAM-III (Low resolution, LR) transmission is the same with Geoscan-Edelveis except the first byte in header (02 instead of 01). So geoscan-tools by @SA2KNG can be used with slight changes.
Also GitHub - Foxiks/StratoSat_TK-1_Decoder: StraroSat TK-1 Decoder (Very WIP!) is available by @Foxiks.

Format of High resolution (HR) camera is similar, except for first bytes in header.
02 00 3E 20 98 C0 08 00 (… rest is payload to 64 bytes) - where 3E size after the byte starting from it, 20 98 - indication bytes for transmission, C0 08 00 - offset in little endian (in this example 0x0008C0).

Here are example of images:
UCAM III (LR)

High Resolution camera (HR)
Compressed

Full size

[geoscan]

Here is schedule of LR transmission in coming days

[t0nito]

Sadly no transmissions over Western Europe It only passes over me at around 9:30 UTC and 22:40 UTC

[tomasz]

Received in KO02od - Poland
After decoding the entire image, the transmission still continues. Soundmodem keeps decoding data packets. What are these packets? Images from the HQ camera?

[tomasz]

https://x.com/Tomek_SP5LOT/status/1740801888063553590?s=20

[geoscan]

That is filling data, so transmissions have to be same size. This will be fixed in January

[tomasz]

Antarctica. Beautiful !

[dl7ndr]

2023-12-31 08:11utc Photo over Everest
Lower part color corrected afterwards.

[iz1err]

Are other image transmission planned for the following Days?
Piero IZ1ERR

[ra3ppy]

HNY!
Оn the same day.

[dl7ndr]

Hi Aleksey,

Nice!
Looks like you’ve got all the data.
In my case I could caught only 877 packets.

73
Daniel

[geoscan]

BIG (New Year) schedule of image transmissions:

02.01
Image 1: 7:58 - 8:00 - 8:02 - 9:28 - 9:30 - 9:32 - 9:34 - 9:36
Image 2: 14:21 - 14:23 - 14:23 - 14:25 - 15:36 - 15:38 - 15:58 - 16:00 - 16:02
Image 3: 17:09 - 17:11 - 17:13 - 17:15 - 17:17 - 17:19
Image 4: 18:45 - 18:47 - 18:49 - 18:51 - 18:53
Image 5: 20:18 - 20:20 - 20:22 - 20:24

03.01
Image 6: 01:06 - 01:08 - 01:10 - 02:42 - 02:44
Image 7: 04:17 - 04:19 - 04:21 - 06:14 - 06:16 - 06:18 - 06:20 - 06:22
Image 8: 7:53 - 7:55 - 9:20 - 9:22 - 9:24 - 9:26 - 9:28 - 9:30
Image 9: 14:14 - 14:16 - 15:48 - 15:50 - 17:03 - 17:05 - 17:07 - 17:11 - 17:13
Image 0: 18:40 - 18:42 - 18:44 - 18:46 - 18:48 (previously taken)
Image 10: 20:14 - 20:16 - 20:18 - 20:20

04.01
Image 10: 06:09 - 06:11 - 06:13 - 06:15
Image 11: 07:46 - 07:48
Image 12: 09:18 - 09:20 - 09:22 - 09:24 - 09:26
Image 13: 16:58 - 17:00 - 17:02 - 17:04 - 17:06 - 18:35 - 18:37 - 18:39 - 18:41 - 18:43 - 20:10 - 20:12

05.01
Image 14: 00:56 - 00:58 - 02:30 - 02:32 - 02:34 - 06:02 - 06:04 - 06:06 - 06:08
Image 15: 07:40 - 07:42 - 07:44 - 07:46 - 09:12 - 09:14 - 09:16 - 09:18 - 09:20

R1NAV

[alpha-sg]

Hi and happy new year
I don’t understand, I receive telemetry but no image.
what are the parameters for good decoding (nfm, wfm, usb)?
what is the bandwidth?
Thanks

[dl7ndr]

FM at a minimum of 11 kHz bandwidth, the same settings as for telemetry.
Just match with the schedule above.

[dl7ndr]

Image 4

[dl7ndr]

Image 5

[geoscan]

Wow. Beautiful!

[geoscan]

Image 3

[dl7ndr]

480x640?

[geoscan]

Yes, 640x480