3 ms·
Absolutely. It's a twin engined something, and we're seeing the heat signature. May not even be an unusual aircraft.
by Applejinx 10y ago
Absolutely. It's a twin engined something, and we're seeing the heat signature. May not even be an unusual aircraft.
- heatButNoRadar 10y agoHow come no radar signature. Is that not unusual for aircraft, or are most aircraft radar absorbing?
- hindsightbias 10y agoMost civilian ATC radars are 'Secondary' radars which depend on cooperative transponders on all aircraft. If you turn your transponder off, the system doesn't work. US ATC uses 'Primary' radars as backup for locating aircraft that don't have transponders or don't have them on. Militaries use Primary radars for most of their activities. Other articles don't provide distinction on what type of radar was used.