Radar Observation Data Sheet — Finland, Minnesota, February 1953

This document is a radar observation report filed by the 756th Aircraft Control and Warning Squadron in Finland, Minnesota, dated February 12, 1953. The report details an incident occurring at 1229Z in February 1953, where an unidentified target was detected on radar. The target was observed at a range of 140 miles on a heading of 155 degrees. According to the report, the blip appeared on the radar scope as being twice the size of an ordinary aircraft. The personnel involved in the observation included 1st Lt. Kenfield, S/Sgt. Duffy, and A/2c Cline. When asked for their opinion on the nature of the target, the personnel noted it was unknown or a 'flying saucer.' The report was submitted to the Air Technical Intelligence Center (ATIC) at Wright-Patterson Air Force Base for evaluation. Following an analysis of the electronics data sheet provided by the radar station, ATIC electronics specialists concluded that the target was not an aircraft but rather radar interference originating from another radar station. The report confirms that no visual observation of the target was made at any time. The document includes technical details regarding the radar equipment used, which was a CPS-3 system operating at 1278 MC, and notes that weather conditions at the time were good. The final conclusion reached by the authorities was that the incident was caused by radar interference.