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.
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CODE 43 OBSERVATION METHOD X Variable Y 0 Naked eye 1 Eye glasses 2 Window 3 Windshield 4 Binocular 5 Telescope 6 Theodolite 7 Radar 8 Photographic 9 Other CODE 45 COLOR X Y 0 1 2 3 4 5 6 7 8 9 Variable Metallic Light-glow-luminous Red Orange Yellow Green Blue Violet Black White £ODE 48 SPEED X Y 0 1 2 3 4 5 6 7 8 9 Variable Hovering, stationary Less than 100 m.p.h. 100-400 m.p.h. More than 400 m.p.h. Meteor like Not stated Other CODE X Y 0 1 2 3 4 5 6 7 8 9 CODE 44 SOUND X Y 0 1 2 3 4 5 .6 7 8 9 - - - - _ — — Variable Motors Jet or rockets Explosion Unlike aircraft r Hiss, swishing, whining Rumbling Humming or buzzing None Not stated Other • NUMBER CQDE 1 2 3 4 5 6 7-10 1 1 - 2 0 2 0 - 3 0 31 or more CODE 49 SHAPE X Y 0 1 2 3 4 5 6 7 8 9 Variable Ellipse Rocket X Y 0 1 2 3 4 5 6 7 8 9 Conventional aircraft LI LIGHT-COLOR Variable White Black Grey Red Orange Yellow Green Blue Violet Other Unconventional aircraft Meteor, comet Lenticular Conical Tear drop Flame, tails, fire Other 292
Analysis, from the classic collection. The PDF is mirrored here; the original link is under it. 309 pages are in the text index: search them above, or from the library's search.