Documents / Analysis

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.

Evaluation 0- Balloon 1-Astrommical 2-Aircraft 3-lighl Phenom. 4-Bnds S-Clouds, Oust, etc 6-lnsuffic Info. 7-Psycnoloiiol 8-UnknoMi 9-Other Total • i9f> 'Sfc Number Certain 0 3 0 0 0 7 Doubtful 0> /f 1 p P P 0 0 7/ Total 2- 3 / 0 / 6 0 0 7 33 S Of, Certain 0-0 /[.I 0,0 ft-/ 0-0 i./ 00 i/.z 0,1 U.7 > .//=• 'eiCent Doubtful 0 / 0.0 /2. / S0 /2 / 0.0 0-0 0-0 3?.J (/AT//J Total 07 3&3 J0 /f.2. O.0 £•/ 0.0 2/z /00 A/ par 6-7P Set Number pertain 0 1 f 0 p 0 1 _A M- 0 by Doubtful 0 0} 0 3 / 0 0) O 0 0 Total 0 / 5 3 1 0 1 0 /f- 0 7S~ $ & 10 A/I Certain 0-0 &••? 0-0 0-0 0 7 0.0 0-0 ft! /&/V7'/ 'er Cent Doubtful 0-0 0.0. 0.0 47.0 07 0.0 0-0 00 0-0 0.0) 2£-7 Total 0.0 t-7 ??3 24.0 £.7 0.0 (-•7 2i-7 0.0 '00. S/6,•/TV* 6 ?£• //~J0 S ££/>/*C5 Number >rtain 0 0 70 0 7 o> 0 0 7 0 / / Doubtful Z- / 3 7 P 0 0> / 0> P / Total / 73 / / / 7 p F Certain 00 00 tf.6 00 S-t 00 00 209 i-f.2, eiCent Doubtful 77 f.$ 2if 0-O ti>0, rc 3/-fe A -A/ ^ C Number Certain o. u 7 P 7 p •0 0 s 0 73 Doubtful P 7 7 / / o? 0 C •£7- Total • 0 / I 0) 0 0) s~ p 77 Per Cent Certain 0.0 0.0 4/.2 0.0 £.9 0.0 00 C0.C? 29.7 0.0 Doubtful 0.0 • - J~~/\7'/A'£/r£- 0 / O c /f. Total 3 P 7 3-1 2- Per Cent Certain /.& 0.0 /*/ /i. 00 /'•3 0.0 SI 9 J.2. 7/-0 Doubtfu ¥1 /t,. / 0-0 0-0 00 /•fi 0-0 00 21o Total 7.V 3S.6 (9-P /.i 3f.f J2> /00- 6 -301 /h//A/07~£c; Numbei Certain 0) AL 7 it Doubtful 3 0 /f 7 0 0 Z-3 Total 6 £3 / P /0 P /r Per Cent Certain 0.0 ,2.9 3.1 0.0 0.0 /k/ 0.0 2^.1 023 Doubtful 0.0 f.t /•t> 0.0 0-0 0-0 0.0 J.Z $7./ Total i t *77 / 4/ 0.0 //t/ 00 27.1 tff /0O. P \Z£ff %£> M/A///7-£-i Number Certain 6 JL / 0 0) •ty-0 Doubtful O J- / 0 0 0 0) • / 7 Total 6 7 j_ 0 0 g_ / ^7 Percent Certain / / . / 2-7 00 00 0.0 4.2 5?-Z Doubtful 00 V.2- 0.0 07 0.0 / • / 00 00 9.0 Total «•? 2JJ / / sz 0.0 2/J 2.1 /V.7 /OO. .aA Evaluation 0-Balloon ' 1-Astronomical 2-Aircraft 3-Ligtit Phenom. ••Birds 5-Clouds, Dust etc 6-lnsuffic. Info. 7-Psychological B-Unknoon Mtliei Total Number Certain ' 0 07 J_ 0 0 ' o J 0 7 Doubtful 0 / 2- 0 0 0 c 0 3 Total 0 / ?• o C 0 3 • 0 .? 0 /o PerCent Certain /CD _M 6.0 J l 30.C 0.C 3^ 0,9 70.$ Doubtfu 0.0 ft.O &w0.0 00 0.0 0.0 0.0 oe•0.0 30.0 Total 0.0 /fit ?/>. 0 2. Doubtful / 0> 7? 0> £> 0? P 0 0> / Total / 0 / 0 / P 7? 0 p p 3 Per Cent Certain 0.9 33.3 O.O 33.3 O.C O.D M M. Ad 6J1 Doubtful 333 ao0.0 p.o 0.0 0.0 O.[) fift 00 33-3 Total 333 0.0 333 0L 333 0.0 00 OJ 0.0 o.o /oa 7/--3/0 SjFCff/y/Ps Number Certain 0 0 0 00 $ o1 0 0 00 Doubtful 0> / P 0 / V p. / 0> 0> s Total 7 70 £ 0? 7 oo 3 Per Cent Certain M. o.o D.O JJL A l 0-0 0,0 0,0 o.o Ai Doubtful 33.3 t>.r- D.O 3-3.3\ tt.o 0.0 33.3 0-£ 0.0 mo> Total 0 33.3 00 ao 0,0 £o do 700. jf/Y/O See/> A/as Number Certain /7- 0? 0> 0> Doubtful P 0 P £> o 0 o1 00' Total 0 7 t>: 4* 0 O & 3 00 f Per Cent Certain AO 72.Z 0.0 S-/J.0 -M o.o 0.0 700.0 Doubtful •AO 0.0 ' 0.0 0.0 o.p 0.0 0,9 0.0 MO o>.p Total 0>,O 0.0 7Z5 00 P-0 O.p 00.0 Its 0.0 y. Evaluation 0- Balloon 1-Astronomical 2-Aucraft 3-Li{ht Phenom. 4-Birds S-Clouds, Dust, etc G-lnsuttic. Inh. 7-PsycholOEial t-Unknoon 9-Ottier Total i/ See.OA,os - 5~Miwi/res Numbei Certain 0 0> 0 0 7 0 IT Doubtful • o 7 /) /? r r ft (7 r ? Total / (? / 0 p •if- ? / / PerCent Certain O.O JA AIL O.O SL -M O.P Ulh za Doubtful Total to ao o.o 0-D 9-1 £.0 9,1 07)\ 00 0.7\ dC o.o\ ao 0.0 -££ 27,3 3£if- ffl 10k 0- 30 M//VVr-£S Number Certain / 0 0 _ ^ _L 0 _J _A Doubtful 0 7 P 0 P & 0 7 Total J / 77 2~ 0 / 0 J 0 r Per Cent Certain /ZS At 0-0 ^01 fJLS o.o Doubtful 40 0.0 0-0 . o.o0.0 0.0 00 O>.o 00 7J.S Total as VXf 0.0 01 0.0 fas 0.0 00 /to, Number Certain 0 o _±O> 7 2£ 0 Doubtful 0 0 7 07 0 0 P P P / 7. Total & 7 7 & & P ./ / Per Cent Certain A6 MO /?./; 3.3 j A u1.2 00 U3 Doubtful 0-0 0,0 3.3 0,0 00 0.0 0.0 00 •0.0 33 Total '33 3.3 0.0 0.0 0.0 S3 &7 33 700 7?0£/9770/U Pj0f ST/)T£P Numbei Certain ~A7 0 0> uZ U2. 7 Doubtful P 07 / P 0 P •0 P P P / Total 0 / 7 70 0- 0- 7 i ^ - Per Cent CetUin _ ^ 2 . 4f 00 0.0 /).O 00 s/.s 9./ V0? 9./ Doubtful <?-0 00 0-0 ao 0-0 00 0.0 0.0 0.0 Total 0-0 fro m9./ Y0-9 ?•' /0O. 233

Cases discussed

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.