What happened
For an hour radar showed clusters of up to ten small targets moving slowly from southwest to east, and one large target at about 600 knots. The pilot confirmed one target.
All cases / From orbit / Osceola radar clusters
July 29, 1952, 1:30 a.m.
Osceola, Wisconsin, USA
"clusters of up to 10 small radar targets"Shape words from the Project Blue Book summary
For an hour radar showed clusters of up to ten small targets moving slowly from southwest to east, and one large target at about 600 knots. The pilot confirmed one target.
Ground radar operators and the pilot of an F-51 Mustang
No explanation has been found.
Filed by Project Blue Book as unidentified.