Documents / Analysis
Special Report No. 14 was issued by the U.S. Air Force's Air Technical Intelligence Center on 5 May 1955. It is a statistical study of about 4,000 reports of unidentified aerial objects from June 1947 to December 1952. The reports were reduced to IBM punched cards and analyzed with methods including chi square tests. The report concludes that the reports it examined are very unlikely to represent technology beyond present scientific knowledge, and it notes that no case produced valid physical evidence.
CM <v Q. 100- 9 0 - 8 0 - 7 0 - 6 0 - 5 0 - 4 0 - 30- 2 0 - 10- 0_ Speed not-stated 37.8 % -iiKe Over 400 mph 24.9% 100-400 mph "10.9% Less than 1.00 mph ftp % Stationary 13.7% Astronomical / if Speed Aircraft, PB( VZ77,Balloon V2 Insuf. Info. -Unknown- itiiiiiiiilii H/ / / v/, WSAA 30 . 40 5 0 60 Evaluation in Per Cent FIGURE 16 DISTRIBUTION OF OBJECT SIGHTINGS BY REPORTED SPEED OF OBJECT(S) WITH EVALUATION DISTRIBUTION FOR EACH SPEED GROUP A-7494
Analysis, from the classic collection. The PDF is mirrored here; the original link is above. 309 pages are in the text index: search them above, or from the library's search.