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.
“multiple objects”5 pages
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
Report, cited by the archive. 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.