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.
“US Navy”1 page
x Y 0 1 2 3 U 6 7 8 9 CODE U7 GROUP CLASSIFICATION (Derived from the angle of elevation) -79.99° to + 79.99° +80.00° to +89.99° +90.00° to +100.00° +100.01° to 130.00° +130.01° to +180.00 and -180.00° to -100.01° -100.00° to -90.01° -90.00° to -80.00° CODE U8-51 SUN BEARING ANGLE (Calculated) CODE 5l SUN BEARING ANGLE X Y 0 1 2 3 h 5 6 7 8 9 East of the Meridian CODE 52 DURATION TXME UNITS X Y 0 Days 1 Hours 2. Minutes 3 Seconds U 5 6 7 . 8 9 CODE 55 DURATION GROUP CUSSIFICATION X Y 0 1 2 3 h 5 6 7 8 9 5 second and less 6 - 10 seconds 11 - 30 seconds .31-60 seconds 6l seconds - 5 minutes 6 - 3 0 minutes Over 30 minutes # CODE $6 OBSERVATION METHOD X Variable Y • 0 Naked eye 1 Eye glasses 2 Window 3 Windshield h Binocular 5 Telescope 6 Theodolite 7 Radar 8 Photographic 9 Other CODE 57 SOUND X Variable Y 0 Motors 1 Jets or rockets 2 Explosion 3 Unlike aircraft k Hiss, swishing, whining 5 Rumbling 6 Humming or buzzing 7 None 8 9 Other CODE 58 OBJECT COLOR X Variable Y 0 Metallic 1 Light, glow, luminous 2 Red 3 Orange h Yellow 5 Green 6 Blue 7 Violet 8 Black 9 White 305
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.