4 ms·
Using ADS-B and calling it a "radar" feels wrong to me. (But is is a cool project)
by bigiain 2mo ago
Using ADS-B and calling it a "radar" feels wrong to me.
(But is is a cool project)
- daemonologist 2mo agoAgreed, and even SSR always felt like cheating imo. I wanna see someone build a primary radar on an esp 32.
- bigiain 2mo agoGotta admit that's what I clicked through hoping for. I've seen a few projects that use SDR to detect doppler shifts of reflections of broadcast FM radio station off planes as "passive radar". But that doesn't get much in the way of direction info, just approach velocity. I've pondered building something that uses that and correlates it with an ADS-B receiver, to see it it can detect aircraft that are not transmitting ADS-B. But that'd get me on another "list" if I published it I suspect... This is not the project I remember, but it's the same idea and technique: https://github.com/Max-Manning/passiveRadar https://github.com/Max-Manning/passiveRadar
- phire 2mo agoI suspect it's possible to build an active radar without exceeding the limits of the ISM bands. Actually, I know it's possible, that's how the automotive radars (used for adaptive cruise control) work. The real question is if someone can get enough range to pick up aircraft.
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- ejanus 2mo agoIs it bistatic or monostatic? How do you know that it is doppler and not multipath?
- blks 2mo agoAnd not actually receiving ADS-B which requires some radio module tunnable to specific frequencies