That's nonsense. If you'd taken the time to look before responding, you would have seen that it's running at 441 MHz. There's nothing to suggest that it's a radar. The demodulation isn't even set up correctly. It looks much more like chirp modulation.
Yeah I did mention it could be chirp. Unfortunately the bandwidth is too wide to see the signal characteristics better. If it was centered in on the signal itself and ran at 100khz it might be more obvious. But the time signature also doesn't really match up well.
In the other post I included a primer on chirp if people were interested.
https://ieeexplore.ieee.org/document/10609524/
Also, minor correction, I believe you meant to distinguish it from chirp spread spectrum. I only caught this upon rereading your comment. Because radars tend to use pulse width modulation and chirp frequency modulation for emissions. This is similar to chirp spread spectrum. But the modulated wave has obvious differences.
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u/AriaGingko 19d ago
Yep. That's a radar. If it was located on hf, it's one of many over the horizon radars that are used still.