Documents / FOIA release
This CIA-released copy of Project Blue Book Special Report No. 14 is dated 5 May 1955 and comes from the Air Technical Intelligence Center at Wright-Patterson Air Force Base. It is a statistical analysis of about 4,000 unidentified aerial object reports from 1947 through 1952, coded onto IBM punched cards with the help of a panel of scientists. The report concludes that such objects were highly unlikely to be technological developments beyond present-day scientific knowledge. It also found no valid evidence of physical matter.
## Approved For Release 2005/07/20 : CIA-RDP81R00560R000100060001-5 CODE 47 GROUP CLASSIFICATION (Derived from the angle of elevation) X Y 0 1 -79.99° to +79.99° 2 +80.00° to +89.99° 3 +90.00° to +100.00° 4 +100.01° to 130.00° 5 +130.01° to +180.00 and -180.00° to -100.01° 6 -100.00° to -90.01° 7 -90.00° to -80.00° 8 9 CODE 52 DURATION TIME UNITS X Y 0 Days 1 Hours 2 Minutes 3 Seconds 4 5 6 7 8 9 CODE 55 DURATION GROUP CLASSIFICATION X Y 0 5 second and less 1 6 - 10 seconds 2 11 - 30 seconds 3 31 - 60 seconds 4 61 seconds - 5 minutes 5 6 - 30 minutes 6 Over 30 minutes 7 8 9 CODE 56 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 57 SOUND X Variable Y 0 Motors 1 Jets or rockets 2 Explosion 3 Unlike aircraft 4 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 4 Yellow 5 Green 6 Blue 7 Violet 8 Black 9 White
FOIA release, from the cia-readingroom collection. The PDF is mirrored here; the original link is under it. The text was read from the page images by an OCR model; expect the odd misread word. 312 pages are in the text index: search them above, or from the library's search.