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Project Blue Book Special Report No. 14: Analysis of Reports of Unidentified Aerial Objects

United States Air Force, Air Technical Intelligence Center · 1955-05-05 · 309 pages · text from the file's own layer

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.

Open the PDF at page 34 Original source ↗

“The Advance”3 pages

  • p. 3 …16 Advanced Study of the Data 16 Position of the Sun Relative to the Observer 16…
  • p. 22 …The three parts of this study (1) the sorting and tabulation program, (2) the advanced study…
  • p. 24 …Advanced Study of the Data It was recognized that the lack of any patte-rns or…
HI 1>A
X
X
X
X
y, 4
45i—
25 50 75
Per Cent
Excellent Good Doubtful Poor
FIGURE 10 DISTRIBUTION OF ALL SIGHTINGS BY SIGHTING RELIABILITY GROUPS. SEGREGATED BY
-__-_z MILITARY AND CIVILIAN OBSERVERS WITH EVALUATION DISTRIBUTION FOR EACH
SEGREGATION I A-7486

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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.