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Technical Topics => SDR - Software Defined Radio => Topic started by: ko4fki on March 12, 2022, 1957 UTC

Title: What are these transmissions on 90 Meters (Kiwi SDR)
Post by: ko4fki on March 12, 2022, 1957 UTC

This might be the wrong board to post this on but, I can't figure out what these solid red lines are on the 90 meters broadcast except for a weather transmission (3410). Can anybody explain this for me?

Image:
https://imgur.com/a/vqwvS2N

Title: Re: What are these transmissions on 90 Meters (Kiwi SDR)
Post by: Charlie_Dont_Surf on March 12, 2022, 2104 UTC

Data transmissions. Likely what is known as STANAG but it might be another format altogether.

Title: Re: What are these transmissions on 90 Meters (Kiwi SDR)
Post by: ~SIGINT~ on March 13, 2022, 0013 UTC

Hard to tell from the screen shot due to the wide span of the spectrum and all of the clutter. Anything below 3.5 MHz (3500.0) should be tuned in Upper Side Band (USB) and not lower side band (LSB). LSB is only used in the Amateur radio band, 3.5 to 4.0 MHz.

Title: Re: What are these transmissions on 90 Meters (Kiwi SDR)
Post by: Josh on March 16, 2022, 0005 UTC

Hard to tell sans audio, but mebbe MARS traffic in that area, 110A and some HAM modes like MT63.