XM - The Backwards Music Station

XM "Backwards Music Station" is more of a radio oddity than a spy station, but it is still quite interesting nonetheless. The station does not feature any music (backwards, even), contrary to what the name might suggest. It's essentially a loop of feedback that is unique to every transmission

E03 transmissions would appear between 1200 - 2200 UTC, each lasting exactly 45 minutes. This station ceased operation in 2008.