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.
Evaluation 0- Balloon l-Aslmnonical J-Auctaft 3-Li(ht Phenom. 4-Birdi 5-CloudJ, Dust, e t c S-IMutfic Into. 7-Psyd»lo|ical S-Unkmvm 9-OtiMi . Total Number Certain J Z6 / / 0 2_ 2-2. AS~/ Doubtful . r 3U- 21 3 1 0 / y Total / /20 // 1 / / ?• 72 PerCent Certain AL 1.7 0.5 AS A.O 5.0 10.0 -12 6M Doubtful 23 /SS ?J /• 0.0 0.0 0.0 /u /•D 70.if Doubtful 3,1 Z5-.3 /O.J. 0.0 A.O 0-0 o.o0.0 0.0 0.0 7-9-6 Total 6.2- 2-6.S /,0 A.C 0.0 6.1 00 A6.3 A.0 AAfi. AA-Jfl S Number lertan _A 2=1 30 / / O / / £2 706 Doubtful 7 f /0 2_ 0 / 0 r Total / / 72- 60 z. I / / / 2-7 f ASA Per Cent Certain xs /4.3 /&6 AL A&£_ ^2S_ 6S7 Doubtful #3 r.6 Af.6 A6 /,7- 06 0.0 3.A 34.2 Total 6-f 272 /•2 0.6 /•2 17 A6-t /00. 3/-6P J\ Number Certain /A 22 P 6? ? 2- 33- / 17 Doubtful AO // 2-0 /0 A 3? Total / f ¥-2 2- 0) f 2- 32- 3 72£ ectMcs Percent Certain 6J. 7.9 /7S 0.0 2. if 0.0 JZL 2St A? 69,0 Doubtful 71 11 / .6 A>.0 AO A.0 00 f.6 7/.0 Total /4.Z • / / / 33.il A 6 3.2 A.0 7,A /, 6 ?.# Evaluation 0-Balloon 1-Astranmical 2-Airaaft 3-LiihlPhemm. 4-Birds 5-Clouds. Dust, e t c 6-lnsuHic Info. 7-PsycnolOfiul 8-Unknow (Other Total Numta Certain U0 3 O u- 22 2-AA Doubtfu 3*7 3 A 2 3 0 0 A02- Total 76 ?3 7 3 At 7 77 7 Percent Certain J3-2. 1,0 MZ 2.0 A3 0.0 S~.9 A3 3.0 U3 Doubttu Ml A6.S A.O A. A A.O A.O A.O_ 3S.7 Total P-f,A 30.7 0.3 A.o ?•? £3. 2S.H 30 /OP. 6SAP M//VL>TJTS Number Certain f3 2-2- 3f /3 0 £7 JL /A 122 Doubtful 37 33 6 c / 0 0 A ?At Total ft 6¥ /? O 2- 27 7 si /J Percent Certain HI7,0 JA M.l 0.0 0.3 IS 2JL /U 70.3 Doubtful 1-7 00 03 A.O 0.0 0.0 A.9 H7 Total 2-%J //•& ^0.2. 6.0 0.0 0.6 fS 2.2. I1.lt H-.l /0Of Ptz/Fp 3 Number ;ertain ? / 2 / 7 JL 2L 7 / / 7 Doubtful /Z- /3 7 2- 0 0 A / 0 ,7 37 Total 37 36 /r3 / 7 £^ AA /fS Percent Certain AO /4>% JJ\ 13 0.6 US 2.6 2J2. 4,5" 7£S Doubtful 7,7 14 A? 0.0 0.0 A.0 0.6 0.D /.*/ 2Jf;5~ Total 7-32 f-7 /•? 1.3 0.6 3Z i.Af AlAor SrAre-0 Hunter Certain uU-2. / / 70 2. 73 /a. 2ZA Doubtfu 20 S3 27 • 0 0 0 1 0 63 Toy $ • / i~? 67 /)- / / 3 71 3Uf PerCent Certain Id. 0.3 A3 2J>.3 0. 2.J.7. 3.S~ V.7 Doubtful s-.f p.t A3 0.0 O.0 0.1 0. 0.0 A.I A13 Total 1/7.3- 2£>.O /•Z 0.3 0-3 2-03 A.9 2'-2. 3.? AA0. • v f ; 160
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.