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 166 Original source ↗

Evaluation
O-Balloon
1-Astronomical
2-Aircrafl
3-Light Phenom.
4-Bnds
5-Clouds. Oust, e t c
6-lnurtic Info.
7-Psvcholotal
S-Unknowi
S-Ottiet
Total
Evaluation
O-Balloon
1-Astmomical
2-Aircraft
3-Lijht Ptimm.
4- Birds
5-Clouds, Oust, etc
6-lnsuffic Info.
7-Psycholojical
S-Unkiwm
9-OBIM
Total
,
Certain
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0
0
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Number
doubtful
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73
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Evaluation
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Total
Evaluation
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1-Astronomical
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0.0
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0.0
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PerCent
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20.0
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Total
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0
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p
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Total
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Certain
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£.7
it./
2.0
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Total
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7-0
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204
X6
1(.S
6./
700
159

Cited by

Cases discussed

The Kenneth Arnold Sighting 1947
Kenneth Arnold... chainlike formation of disc-shaped objects near Mount Rainier, Washington

About this file

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.