Documents / Report

Project Blue Book Special Report (second copy)

Internet Archive · 309 pages · text from the file's own layer

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.

  • p. 190 …S £'0/? 'S t r/0fl/ Of- roe M0/ur*/i/as EvaMnon 0-BIIIOM l…
4/22. ^£I/AL
#
Evaluation
0- Balloon
1-Astrwomial
2-Aircrjft
3-Light Piwnom.
4-Birds '
S-Clouds, Dust, etc
6-lnwlfic Into.
7-PsyctolO|ical
S-Untaoim
9-Otner
Total
Evaluation
O-Balloon
I-Astronoaical
2-Aircnfl
3-Lijhl Phenon.
4-Birdj
5-Clouds, Dust, etc
S-lruuffic Info.
'-Psycholofical
8-UnknoMi
dottier
Total
Evaluation
O-Balloon
1-Astronomical
2-Aircraft
3-Ught Ptienon.
4-Birds
S-Clouds, Dust, etc
6-lnsuffic Info.
7-PsycholOKicaJ
D-Unknoin
9-0 tiler
Total
Ei i t
Number
Certain
/
2
2
0
0
0
/
0
/j
r
Doubtful
/
_ 0
0
&
0
0
0
0
. 0
2,
Total
2.
t
0
0
0
/
0
/
/0
Certain
20,0
•700
0,0
0-0
0,0
/0.0
0.0
/&. &
me
Percent
Doubtful
/00
0.0
00
0.J
J3J2\
20.0
Total
30.0
/2J2.
00
•£>
/0.0
/pa
A2/f
/
/7
Doubtfu
/
/
0
0
0
0
/U£
F
Certain
/ / /
0.0
22-2
rt.0
0.0
00
0.0
00
aa
65.C
erCent
Doubtful
0.0
22.Z
do
0.0
JAJ.
0C?
0-0
/ / • /
Total
/LL
0,0
4/4
0.0
0,0
/ / • /
(70
0.0
22.2
/ / • /
/oa
.1/
Percent
Certain
/
0.0
Total
23.7
/ • /
21.3
£i3
0-0
0>0
2/.
/00.
Percent
Certain
2SO
/*.J
0.0
0.0
0O
0.0
0.O
2S0
0.0
75.0
Doubtful
r^r*
00
00
00
0.0\
2S.0
ao
00
0.0
0.0
Total
/2-B
0,0
00
00
0.O
?9-0
\£JZ
/pp.
y0
/ • 9f*
Number
Certain
2
0
7
0
0
S
/
2V
Doubtful
0
0
2.
0
0
0
0
0
0
Z
Total
7
0
9
0
/
0
/
?
26
* /V
Percent
Certain
77
rt.0
rt.0
3.*
0.0
//.e
3tf/
Percent
Doubtful
/•(?
6.2-
s./
O-0
00
/ 6
0.0
3/. 2
Total
/#"/
32.
2/g
3/
&£.
4.7
42
2^0
3/
/00.
Z?S d£ rt S£/l
Number
Certain
I
ft
/
0
0
2
^
0
//
Ooutitfu
/
/
ft
0
A
Total
J *
/
0
0
0
2,
0
0
/7
Certain
/ / ^
J2ZL
S.f
(?.0
0.0
0.0
3S.3
0.0
(.4.7
Per Cent
Doubtful
$.7
23. f
0.0
0-0
00
0-0
ao
a?
00
Total
(7.7
*f*
00
//.g
&£-
3S.3
0-0
/O0.
185

Cases discussed

About this file

Report, cited by the archive. The PDF is mirrored here; the original link is above. 309 pages are in the text index: search them above, or from the library's search.