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.

  • p. 245 …P _/) - 7 P P 3 ?% ToUl •6 'r? g_ 0 70 '0 5L3fy Per Cent . Certain…
  • p. 256 …c Doubtful 2, g- 0 0 ?• /g >//r/ ?G//> Total f // / /0 0 & ? 6/ /P6 S…
  • p. 258 …9 0 $ / 'i a 2£ -L 43 r/?g(. Certain / / f2> 2. I? ?; •2V 1 7…
.. I
r a* £•?
13.3
04
• OP
0.0
0,(OS
Number
Certain Doubtful
A
Total
i
Q
Percent
Certain
_ ,
I
Doubtful Total
1
1
Number
>rtain
/
c
/
o
0
C
o
Doubtful
P
£)
P
0
P
P
0
0
P>
P
Total
/
P
/
o
• 0
0
p
p
0
F
Certain
5V.0
0-0
SP.O
-0L.
o.oCO
o.o
PA
0-0
erCent
Doubtful
0.D
0.0
00
fl.O
00
00
0.0
0.0
do
0.O
0.0
ToUl
fOi
01
S0.0
o.c46
00
O.P
0,0
0fi
Q.V
/OP.
& i
Certain
0
c
0
0\
0
0
P
(
1//SA4A
?* (?t
Number
Doubtful
0
0
0
0
P
P
P
o
P
0
? ?
Total
0
0
P
O
/
P
0
P
o0
1
P
Certain
6.0
fro0,0
60
0.0
06
0,0
OO
0,0
/0O.O
vas
erCent
UouUl
Vop.fj
6.6
06
• 06
0.0
0.0
o.o0,0
0.0
0.0
sft?r
Total
O.o
D.O
0.0
0.0
m-o
0,0
o.o6.0
0.0
pp
/oo
Evaluation
O-Mloon
1-Astnmmical
2-Aircraft
3-Light Pbenom.
4-Bints
S-Clouds, Dust. etc.
S-lnsuffic. n h .
7-PsvcholojicJl
8-Unknowi
M f h e r
Total
^/ Sea0/v/>s - £ MiA/vres
Number
Certain
P
/
/
P
P
/
P
0
P
5~
Doubtful
0
p
p
0
0
/)
P7
0
0
0
Total
P
I
I
P
P
I
0
/>
s~
Percent
Certain
O.0
2£JL
VPg_
ao0.0
20/>
M
-££
M
I00D
Doubtfu
do
0.0
O.o
0.0
0.0
o.o
0.V
0.t>
0.0
0.6
ToUl
HP
0.0
2J.0
?J>.0
do
0,0
20.0
0,0
0.0
P.0
/oA
6 -ft? to/A/vTGi
Number
Certain
P
0
0
0
7
J2.
0
1
0
Doubtful
/
0
D
P
0
P
0
P
0
• o
/
ToUl
/
P
0/
0
0
0
1
p
3
Percent
Certain
ao0.0
0.6
do33.3
O.D
0$
O.0
111
Al
((.7
Doubtful
33.3
P.0
00
0£>
0.0
00
(P.O
OP
0.0
33'3
Total
33.3
0,0
o.o33,3
fit
0.0
P.O
33.3
0.0
/0O.
Pt/eO. ?a M/AIVTES
Number
;«Uin
/
P
0
%_
P
/
Doubtful
P
P
P
0
0
p
p
0
0
0
ToUl
o
/
•0
p
p
a-
Percent
Certain
00
/2,r
0.0
00
2f£>
00
QSO
DO
2S0
/ZJ
fO06
Doubtful
P.O
0.0
0.0
0.0
ao
o.o0.0
, 0.0
to
' IP
o.c
Total
o.o
O.0
o£
aso
#0
01
2S70
IAS
/oo,
0V*/1770/1/ /lJ0r fr/97E0
Number
Certain
/
V /
_L
•0
P
II0
f
/
2-7
Doubtful
0
/
3
0
P>
0
/
$
P?
Total
/
je.
/
0
P
r
/
33
Percent
Certain
so
33.3
JA
6.0
P.O
0,0
/SZ
3,0
MS
Doubtful
AO
3.0
9,1
1,0
o.b
0,0
0.0
3.0
0.0
o.o
Total
3.0
3U
12.1
3.0
0.0
06
3.P
/S~z
•30
(69
t 237

Cases discussed

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.