Comment by chmod775
7 months ago
You don't need radar to track aircraft with ADS-B on: The plane is actively broadcasting its position.
There's ADS-B receivers the size of a USB stick - because some are USB sticks and available for 50 bucks on Amazon.
No, but if ADS-B is off then its not squawking unless its got like Mode-3 or Mode-S then maybe MLAT can be used.
Just to be specific, PAT25 seems to have been using Mode C for an earlier portion of its flight and Mode S for the later portion.