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Aircraft Reflections. Doppler effect on 144 MHz WSPR signal caused by passing aircrafts Allard Munters - PE1NWL pe1nwl@gooddx.net. Aircraft reflections on Wed May 19, 2010 at 1042 UTC and 1054 UTC
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Aircraft Reflections Doppler effect on 144 MHz WSPR signal caused by passing aircrafts Allard Munters - PE1NWL pe1nwl@gooddx.net
Aircraft reflections on Wed May 19, 2010 at 1042 UTC and 1054 UTC Horizontally polarised 144 MHz WSPR signal from DL1DBC (Wittingen, JO31oj) as received by PE1NWL (Gouda, JO22ia) – distance 186 km.
reflected wave with positive doppler shift, aircraft moving towards PE1NWL direct wave reflected wave with negative doppler shift, aircraft moving away from PE1NWL 10:42:44 aircraft at nearest position to PE1NWL
PE1NWL 186 km DL1DBC
Case 1 • May 19, 2010 at 10:42 UTC • Comparison with “Casper Live Aircraft tracking” at http://casper.frontier.nl • Reflection pattern corresponds exactly with flight path of SOX028 to Amsterdam • Nearest distance (zero doppler shift) at 10:42:44 • Aircraft: Cessna C650 • Speed: 223 knots (413 km/h) • Altitude: 17073 ft (5204 m)
PE1NWL DL1DBC 10:42:00 UTC pos. doppler shift
PE1NWL DL1DBC no shift 10:42:44 UTC
PE1NWL DL1DBC neg. doppler shift 10:43:32 UTC
Case 2 • May 19, 2010 at 10:54 UTC • Comparison with “Casper Live Aircraft tracking” at http://casper.frontier.nl • Reflection pattern corresponds exactly with flight path of IBE3245 to Madrid • Nearest distance (zero doppler shift) at 10:54:45 • Aircraft: Airbus A320 • Speed: 364 knots (674 km/h) • Altitude: 12917 ft (3936 m)
PE1NWL DL1DBC 10:54:00 UTC pos. doppler shift
PE1NWL DL1DBC no shift 10:54:45 UTC
PE1NWL DL1DBC neg. doppler shift 10:55:27 UTC