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.
“Harder”1 page
Ol ingsSightject XI O ° J5Numl 300 275 250 225 200 175 150 125 100 75 50 25 -90 All object sightings Sun rise Unknown object, sightings Suniset -60 -30 + 30 +60 +90 +60 +30 Angle of Elevation of The Sun -30 -60 - 9 0 FIGURE 4 0 FREQUENCY OF OBJECT SIGHTINGS BY ANGLE OF ELEVATION OF THE SUN, INTERVALS OF 10 DEGREES OF ANGLE A-7336
Analysis, from the classic collection. 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.