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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.

r0e, 0 Evaluation O-Balloon 1-Astrenomical 2-Aircrafl 3-Light Phenom. 4-Birdj 5-Clouds, Dust, etc 6-lnsuflic Info. 7-PJycholOfical 8-Unknoim 9-Other Total \S"Stcoffz>i D* Zest Number Certain / 3 A. 0 o 0 0 0 /? Doubtful 0 /o O o 0 o 0 a O o /0 Total a 0 0) X7 PerCent Certain Ja4ll 74 0.0 00 _M 6-0 74- Doubtful 45 0.0 £0 $0 0.0 40 0.0 37.0 Total gsi 00 p.o 0.0 fit 74- /OO. ye/ir/OA/ 0f x/tftr/zi/c. *£o ex. SLOHJS/ Number >rtain 0 / a / 0 2. \0 Doubtful 0 / o o 0 o o o o / Total ft (? / P X P fO PerCent Certain at me 0.0 0.0 00 /at O.C 0.0 p.o Doubtful 00 0-0 06 P.O 0.0 00 03 0,0 /fiO Total 50.0 00 0.0 0>,[) /0.1 0D 0-0 {00. Number ;ertain / 0 0 0 a i /4 Doubtful O I4 o o 0 0 O 0 o 1 Total / /0 0 0 0 0 / ? , 2.1 Per Cent Certain AL HA. 0.0 0.0 0.0 0.0 / / - / Doubtful 00 AM /to 0,0 00 0.0 0-0 00 00 33.& Total ¥$ ?3% 0-0 0.0 00 0.0 ft / // 0 4x PerCent Certain 111 131 Jd. X.4 0.0 0.0 2.¥ 0.0 m Doubtful 0.0 00 0.0 0.0 2,4 0,0 0,0 0.0 00 /ll Total rf.3 ??.t? 2/4 24 0.0 •7/ 2.y 00 /00. Ovf/t Jo rf/ J/ Doubtful JT II 1 0 0 0 0 e> 0 0 /I Total i, Z9 '$ 0 0 /0 0 2.1 Z> 7& Percent Certain JJL 1L1 12_ 00 0.0 /£* 0.0 21£ 71k Doubtful &. i> /4r /•3 0.0 00 0.0 .0.0 £? cP 224 Total 7.9 /0Z 0.0 0.0 0.0 0.0 27 L 2 6 /00 7 AV1f0 ei//) Evaluation O-Balloon 1-Astronomical 2-Aircraft 3-Ligtit Ptienom. 4- Birds 5-Clouds. Dust, etc 6-lnsuffic Into. 7-Psychological S-UnknoMi M t h e r Total Certain 0f 3/&#r/rt/ £-/0 *L Number Certain 0 / / 0 O / 0 j - O s Doubtful O /4 0 0 0 0 0 0 0 ./4 Total 0 /? , 0 O 0 / 0 $ • 0 IX Certain 0.0 ££. 0.0 0.0 0,0 &£. 320 JZJZ PerCent Doubtful 00 0.0 0.0 0-0 0.0 0-0 0.0 _&£. Total 0.0 47.1 0.0 0.0 0.0 4f 0O 2Z .7 a.0 /0Q. /{£^* 0 0 4- 0 / / Doubtful O X 1 0 0 0 0 0 0 J Total 9 0 0 0 0 0 0 /4 Certain 0.0 ,00.0 0.0 0.0 0.0 0.0 0.0 2&i 00 7ti PerCent Doubtful •SH? 7./ 0.0 0.0 00 0.0 0.0 (7-0 Total 0.0 %/ 0.0 0.0 00 0.0 0.0 /00. Certain 0 { a 0 0 0 / 0 4 0 b />0i 31- f Number Doubtful O 0 0 0 a 0 0 • t> 0 0 0 Total O f 0 0 0 0 / 0 V 0 6 0 Certain 0.0 /t-7 0.0 0-0 0,0 0,0 M-7 0.0 00 /00.C 'erCent Doubtful .0.0 0,0 0-0 0.0 0.0 /),0 0.0 -&J0- 0.0- r£o Total 0.0 00 0-0 0.0 0.0 ft-7 0.0 66.7 0.0 /00 Evaluation O-Balloon 1-Astronomical 2-Aircraft 3-Light Ptienom. 4-Birds J-Clouds, Dust, etc 6-lnsrttic kito. 7-Pr»cfolopcal S-Unknmn M t h « r Total Number Certain / O O a & / 0 / 7 Doubtful £> 1 (« O 0 0 0 0 a 0 1 Total / / c (? 0 0 / 0 ¥ /4 Pet Cent Certain • 2 / 0.0 JUL 0.0 0-0 00 4/ 2U Doubtful 0.0 7-/ ao 0.0 0.0 0,0 •A O^O'. Total •r / 0.0 f, / e.0 Hi *l M0, 6 -.10 /4/Afnres Number Certain / a 0 0 J. s Doubtful a_ 3 0 a 0 a 0 O 0 0 3 Total / ^ / z 2. 0 2, 0 // PerCent Certain /ii m.-£L£L 00 &J2- OJ2- &£. J22. Doubtful 0.0 773 0.0 0,0 00 0-0 00 0.0 0,0 0.0 27.3 Total /#€ /g.t Qe /f.z ao /0O. £>\iee 30 A?,s/vrfs Number >rtain / / 0 0 a a 0 3 0 Doubtful O O 0 • O O e> 0 0 G 0 0 Total / / f 0 0 0 0 0 Per Cent Certain /Lf. 0.0 00 0.0 0.0 0.0 Se.e /00.O Doubtful 0.0 0.0 0.0 00 00 0.0 0.0 0.0 a-0 00 Total ft-7 /(t-7 0-0 00 0-0 0-0 0.0 S0.O 0.0 tee. T^^ncw //or *5h)T?t> Number Certain 0 / 0 O 0 a / Doubtful J2? 0 0 c 0 0 0 0 Total 0 4S ? 0 0 0 0 / 3"7 Percent Certain JJL 28.1 AS 0.0 0.0 0.0 0.0 7.0 /.s Doubtful 0.0 414 3JT <70 0.0 00 0,0 0.0 -0,0 0.0 Total 0.0 5.3 0-0 0.0 0.0 /0.S 0.0 •f.0 /••? /0O. 223

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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.