🇺🇸 USAF — Project Blue Book
In October 1957, at Wiesbaden Air Base in Germany, a radar detected an object resembling a normal aircraft but 2.5 to 3 times larger than usual. The radar did not register elevation changes, and the object appeared and disappeared at the same location, repeating the pattern several times. The observers, considered competent and reliable, ruled out common interferences and concluded it could be due to anomalous propagation of the radar signal.
Anomalous propagation is a known radar phenomenon where unusual weather conditions cause signals to reflect unexpectedly, creating false images. Although other explanations were not ruled out, military experts agreed this was the most likely cause. The case was analyzed by several units, including meteorologists and electronic officers, who confirmed the weather conditions were consistent with this type of phenomenon.