Documents / Report
This is Project Blue Book Special Report No. 14, "Analysis of Reports of Unidentified Aerial Objects," Project No. 10073, dated 5 May 1955. The study reduced about 4,000 sighting reports received by the U.S. Air Force between June 1947 and December 1952 to IBM punched cards and analyzed them statistically, including chi square tests comparing knowns with unknowns. It concludes that the reports very probably do not represent technological developments beyond present scientific knowledge, and it notes that no case produced 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 50 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
Report, cited by the archive. 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.