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 1-Astronomical 2-Airctaft 3-Lijtit Phenom. 4-B.rds S-Clouds, Dust, etc 6-lnsuffic Info. 7-Psjcrolotical t-Unkimm Mttlef Total Certain 89 4/ +0 4 // 79 /s iZ?S Au Numbtr Doubtful SI 35 /q 3 o i0 t o 7 IZO Total in 7^ if 9 7 0 10 IB 'A 7? 1Q 4/t> Ys»f Certain J/4 9-9 7-0 It fio -&£ *?/, /4o J.I HA V rs 'erCent Doubtful /J.3 7.4 4.1, 0.7 0,0 /4 o.o O.X 0.0 /•7 zf,S ?££O Total 33-1 I7.X J^L 0o A 4 4-z ZS /9 o 48 /oo. s Number Certain O 0 o o 0 o 0 0 o o 0 Doubtful 0 A o o o a a o e> a 3, Total 0 X 0 0 0 0 0 o d 0 p. 41 Certain fi.0 O,o oo o,o 0,0 o.o J2J2. O.O O.O O.9 >er Cent Doubtful 0.0j /OO.O O.O 0,0 o.o Oo o.o O.O o.o O.O /O0.O 1 Total O.O /eo.» o.o o.o o.o o.o o.o O.o O.O 0.O /oo. srsr/oa//?*. O O 0 O O O 0 O A a Total s 0 0 0 0 .2. 3 J2. fo Per Cent Certain 3LA- 0.0 0.0 0.0 0.0 9,-t /3(» JJ. 0.0 4o1 Doubtful O.O O.O O.O O.O O. O O.O O.O O.O 91 1-1 Total 3i4 JZ.7 0.0 0.0 0.0 0.0 9./ /3 C ?•/ 9-1 /oo. / f*r/ Number Certain -4. /0 0 0 j - 0 n Doubtful ' O 3 / 0 . 0 0 a 0 0 0 Total Y S *. 0 Q 0 1 0 0 /7 Per Cent Certain A3J / / • ! f.4 O.o a.O j - $ 0.0 0.0 7U Doubtful O.O I7M S.9 0.0 GO 0,0 04 0.0 00 Total Z94 //£_ 0.0 0,0 0.0 -£$. 0.0 #4 0. O /9i~2 Number Certain 4- 0 _ ^ 7 /A Doubtful J~O 7 7 0 C e> / 0 4 Total /nIfO 7 0 JO 11 $ TO 1U 337 PerCent Certain 2/1 (••? i.o 1.2 0.0 2.1 SoS 3.(> 7O.6, Doubtful /4.i £3 f.o 01 0.0 / • / 0.0 0.3 0.0 /•4 Jo,i 41 /oo. Number Certain Doubtfu Total P n C e n t Certain Doubtful Total /?tl ir/0, 1/ £/6>,vr/A /C /9u. f i /If _ . Evaluation 0-Balloon 1-Astronomical 2-Aitcratt 3-LigM Ptienoni. 4-Birds S-Clouds, Dust, etc t-lnsuffic Info. 7-Psycholo|ical B-UnknoMi 9-Other Total Certain 49 0 0 Total / a 0 0 0 0 c0 1 Per Cant Certain a# 0~.o 0.0 fio O.O 0.O O.e 0.0 SO* I0&I) Doubtful 0.0 O.O O.O O.o _oo_ 0.0 0.0 0.0 0.0 0.0 0.0 Total Jle.p 0,0 0.0 O.o 0.0 Oo O(? 0.0 SO. I) /0O / O 0 O O J n Total 10 12 7 0 0 0 1 0 I I Certain J7,6 tu 3.4- 0,0 ftp 0.0 34 tPO JA 0.0 PerCent Doubtful J4-I 0.0 0.0 0.0 0.0 0.0 0.0 /o,3 44.1 Total 41.3 09 O.O 0,O 3.4 O.Q 3,4 //?•} /oo. Number Certain / & O 0 / 0 J / 'H Doubtfu 4 4' 0. O O O O a a If Total 5 /3 a 0 0 0 1 0 5 / Certain 4,0 ix.o 0.0 0.0 0/7 O.O 4.O 0£> /Zo 4,o Sl.o 3er Cent Doubtful /I.o lo.o to 0.0 0 O 0,0 0.0 0.0 0.0 0,0 44.0 Total JO. 6 J'ZO to 0.0 0.0 OJ>. 4,O O.O 4,O /OO, Evaluation 0-Balloon 1- Astronomical 2-Airuaft 3-Lijtit Phenorn. 4-Birds S-Clouds, Dust, etc S-lnwftic Into. 7-Ptycnok>|ical t-Unknonn t-Otlwi Total Nunber Certain sT / O O / ^> /4 / Doubtful / O O O O O £> O O O 1 Total (, 1 0 0 0 0 1 0 1 Per Cent Certain JU 3.4- Jo.1 0.0 0.0 0.0 34 0.0 34 Doubtful 34 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 34 Total 1o.£ JA Ao.l 0.0 0.0 0.0 J4 0.0 tn 34 /oo. Nunber Certain J O / O O O O O O H- Doubtful / O O O O O O O O I Total / / * 0 0 0 0 0 0 Per Cent Certain JOO 0.O Xi.o 0.o O.o 0.0 0.0 O.o 4o.o O.o 80.0 Doubtful O.O Jo.o O.O O.O O.O O.fi 00 O.O O.O AO.O Total <&£. XO.O 1'.9 O.p O.O O.o O.O f.o 4o.o O.Q /oo. Number Certain IS _ 1 M 0 cT - T 4- Doubtful 2.3 J #0 S I A 0 a 1 Total ire 11 3? 1 1 7 S 1 11 t Per Cent Certain J0.I xs 7.3 0.0 2.1 3.o 3.o /A /?.1 3.O \ML Doubtful /4-o 4.1 /J.A /t o.& /.z 0.0 0.0 0.0 o.b 3f.f Total /o,4 /9,r /,f M 42 So h mMr /CO. Kumber Certain Doubtful Total PerCent Certain Doubtful Total 201
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.