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86% Positive

Analyzed from 220 words in the discussion.

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#radar#ads#decode#cool#though#receive#using#usb#cheating#need

Discussion (13 Comments)Read Original on HackerNews

amatechaabout 3 hours ago
Looks pretty cool, though kinda "cheating" by pulling from adsb.fi - though I think you'd need something a lot more powerful than an ESP32 to receive and decode ADS-B ;)
sephamorrabout 3 hours ago
I would actually expect the math to decode ads-b traffic is substantially less complex than, for example, a TLS connection.
greggsyabout 2 hours ago
It is trivial to decode, but don’t forget that tls is extensively optimised on most networking stacks.
bigiainabout 3 hours ago
Using ADS-B and calling it a "radar" feels wrong to me.

(But is is a cool project)

daemonologistabout 2 hours ago
Agreed, and even SSR always felt like cheating imo. I wanna see someone build a primary radar on an esp 32.
punnerudabout 3 hours ago
Actually possible to receive and decode ADS-B on ESP32, but MLAT is failing (tried hard but not found a trick yet).

Biggest problem isn’t that it’s not powerful enough, but the USB port bandwidth don’t match most SDR.

Using some clever tricks you can receive parts of the message on a slower USB and be able to decode ADS-B

1e1aabout 2 hours ago
Why do you need to send the samples over USB?
greggsyabout 2 hours ago
You could fit a pi zero and rtl in an enclosure not much larger than the one they’ve printed.
boguscoderabout 1 hour ago
Perhaps I didn’t read it thoroughly enough but it seems that lat/long of the “radar” are expected to be entered by user, I think using wifi positioning could be of great assist and could be done from mcu itself without involving web portal, though maybe portal already does it (didn’t get to see it)
freitasmabout 3 hours ago
Well, a radar-like display, then. But not a radar.
NooneAtAll3about 3 hours ago
radar *display*

making esp32-based radar emitter would've been cool, tho

NNimaandi43 minutes ago
Its an amazing work
sneak34 minutes ago
ADS-B is not radar, despite ATC calling these sorts of things “secondary radar”.