3 ms·
Tracking anything you might track with an active RADAR, but without needing a permit to operate a RADAR emitter. The ability to track 'stealth' aircraft is just
by angry_octet 4y ago
Tracking anything you might track with an active RADAR, but without needing a permit to operate a RADAR emitter. The ability to track 'stealth' aircraft is just a niche. Similar techniques are used to measure atmospheric density (for meteorology) using the known signals from GPS satellites.