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Some stuff that I have heard above 1000 mHz:
Airport Radar - 1030, makes a "swoosh" noise as it scans.
Aircraft transponders - 1090, they emit a "buzz" (identifying code of some sort), when the plane is hit by radar. (fun for plane watching)
Tacan aircraft beacons - up to 1214, transmit CW identifier.
Ham band (23cm) 1240-1300 at least one fairly active repeater in my area.
Geos weather Satellite - 1691, Using an old 10 foot C-band Satellite dish, I have downloaded images of the earth taken from approx 23000 miles up!
Misc Buzzing noises - around 1800 and above 1930, Digital cell phones, data links?
jr
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