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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.

Open the PDF at page 243 Original source ↗

“R.G.”3 pages

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Evaluation
0-Balloon
1-Astronuiial
2-Ancrafl
3-Li(fit Ptitnora.
4-Birds
5-Clouds, Dust, etc
S-liwilfic kifo.
7-PsydolofcH
S-Unkoowi
9-OOicf
Total
Certain
^
J
0
p
r
/ 7
* 2O/.
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Number
Certain
0
o
3
0
/
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3
£)
*7
Doubtful
P
P
0
X
/
0
~p~
0
0
3
Total
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0
3
/
0
7
p>
3
70
Certain
04)
14-0
MO
OP
to0.0
0,0
3Q.D
0.0
700
Per Cent
Doubtful
AO
0.0
~A0
L:
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0.0
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400
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Number
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0
0
p
7
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76
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0
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0
0
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Total
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0
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0
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7
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0.0
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6-7
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0.0
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6-7
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0.0
0.0
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0.0
Evaluation
0-Balloon
l-Astrononical
2-Aircraft
3-Lijlit Ptienom.
4-Birds
5-Clouds, Dust, e t c
6-lnsuffic Into.
7-Psycholojiul
8-UnbMWi
HJOier
Total
^ / seeo/vas - g M//vure%
Number
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0
0
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3
2-
f
2-
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P
g-
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31
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3
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7
1
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77
Total
6
0
77
f7
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3
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0.0
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0.0
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0.0
0.0
J,(,
304-
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77-
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77-?
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Number
:ertain
_£
1
0
p
p
/
p
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0
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p
p
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0
Total
7
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0
/
f
3
3P
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Certain
/ / ;
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0.0
0.0
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33
00
mp
ao.
m
Doubtful
0.0
/ / 7
0.d
0.0
0.0
P.0
0.4
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0.0
0.0
20,0
Total
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33
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0.0
to3.3
33
m70.0
/0O.
Number
Certain
S
0
/7
7
• /
0
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/
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9
11
Ooubtfu
0
3
77-
0
/
0
P
/
P
P
9
Total
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3
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1
2.
P
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7t
9
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Percent
Certain
0.0
JL
0.0
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2Z.S
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288
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u
40
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0.0
0.0
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0.0
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1,1
0.0
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IPO.
Evaluation
O-Balloon
1-Astronomical
?-Aircraft
3-Ligrtl Phonom.
4-Birds '
S-Clouds, Oust, e t c
6-lnsutfic Info.
7-Psycholoptai
t-Unfcnowi
mother
Total
• A
OAJ0S
Number
Certain
0
- d
o
0
0
3
0
3
0
7
Ooubtfu
P
/
Q
0
0
P
0
0
3
Total
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/
3
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P
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P
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6,0
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30,0
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111
70.0
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0.6
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300
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400.
/
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6.0
P,D
Doubtful
to33.3
0£>
31,3
10
o.o
33.3
0.0
0.0
400.0
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0.0
333
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0.0
jy.3
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0.6
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PJ)
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ft
Evaluation
0- Balloon
1-Astronoaiial
2-Aircraft
3-Lifht Ptienoa.
4-Birits
5-aouds, Dint, etc
S-hunffic Mfo.
7-PTYdBlorol
l - t W a i o «
M M w r
Total
6/ Z&ee/ves - S rt//vi/r£s
Nuaber
Certain
0
0
p
0
/
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3
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&
Total
t>
/
3-
P
(
0
6
0
3
3
ft
PerCent
Certain
0
o,o
0.0
0.0
/0O
01
~07d
0.0
30/)
301
7P.P
Doubtful
0.0
1 /0.0
0-0-0
0.0
00
00
01
0.0
0.0
00
300
Total
do
/0.O
£0.0
0L
zap
00
0-0
0.0
70.0
30.0
700,
6-20 Ai/n/fres
Number
;ertain
/
0
_£
_ ^
P
.0
3
0
JL
Doubtful
7
0
0
0>
0
0
0
0>
0
/
Total
/
/
0
/
0
3
0
y
Percent
Certain
•0.0
JA
J£0
0.0
J>.6
J2£
-M-
3LI
0.C
M
Doubtful
0,0
7&S-
00
0.0
00
00
0.0
ao
pto
p.0
Total
/AS
PS
0.0
00
00
/us
0.0
37S
P-0
700.
/!?//££ ?& A/z/uurss
Number
>rtain
0
^J_
0
_L
_ ^
_ ^
P
73
P
Doubtful
0
0
/
0
0
0
0
0
0
4
&
Total
0
3
/
0
0
0
/
/3
4
Percent
Certain
_ ^
6£t
00
STO
ZMJA
£O_
is:o
0-0
rt.0
Doubtful
04>
ao
.fT0
(7.0
04)
0.0
0.0
0.0
M>
400
Total
0>6
7J7O
,f0
0.0
0.0
&
&0
f.0
/M.
P^/or/c/O /i/or fr/)T£a
Number
Certain
0
-A
0
0
6
^7
TL
Doubtful
0
0
7
0
P
0
0>
P
P
0>
7
Total
0
/
/
^
0
P
7
PerCent
Certain
0.0
373
0.0
0.0
o.o
0.0
2/A
/0S
70S
mi
Doubtful
0.0
0.0
0.0
0-0
0.0
0.0
0.0
0
O,0
•5Z3
Total
0.0
53
0.0
0.0
AO
3A*
/AS
/0S
236

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About this file

Analysis, from the classic collection. 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.