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. 117 …a? 7T fit at> to 0,1 oti 4P 4t 0.0 7.7 Total 77…
A/i,
Evaluation
0-Balloon
lAstnnomical
2-Airtraft
3-LiIht Ptienc*.
4-BirHs
5-Cloudj, Dust, e l c
6-lnsiflit Wo.
7-PjydBlofical
S-UnkMM
»-Othet
Total
Number
Ortun
2
L
__d
_£_
__£
$
0
5
1
JJ
Doubtful
/
1
1
0
n
0
0
Q
0
0
s
Total
3
%
0
0
0
s
0
5
1
17
Per Cent
Certain
/0.5
JA
0.0
0.0
CO
6.0
SCl
O.C
•2CI

o.c
0-0
o-o
(1-0
; «
•15.2
IS. 2
IDS
Oj
oJ
o.O
o.o
2C.3
IOO-
Number
Certain
/
0
0
0
0
01
_ rtjn
—1,
0
i
a
dL
_J_
ii
t
Doubtful
0
1
1
0
0
0
0
0
0
0
X.
Total
0
%.
1
0
0
0
0
o
s
0
Per Cent
Certain
an
u.%
Q.I)
O.C
Q.O
CO
o.c
. o.o
fO.O
Doutttul
Q.Q
/O.I
H.I
^_.0.C
o.c
JLLJ
CO
c.o
O-o
fl.il
Total
0.1
33M
U-l
U
O.O
0.0
0.0
O.C
sic
6.0
100.
Number
Certain
D
0
T l
G
0
_ i .
0
- r
3
Doubtful
0
0
0
0
0
0
0
0
0
0
0
Total
0
0
\
0
0
0
a
0
0
C
3
Per Cent
Certain
OJ
J3-3
O.D
o.o
Jli
110.0
Doubtful
10
0.0
0.0
OJ)
d-d
OJ
Q.O
Q.0
o,o0.0
o.o
Total
Q.0
o.o
33,3
0,0
Q.0
0.C
£6.7
0.0
o.O
0.0
iQQy
1
1 Evaluation
O-Balloon
l.Astronomical
2-Aircraft
3-Lirht Phenoo.
4-Bints
5-Clouds. Oust, etc
6-lnaiflic Into.
7-Psycliologiul
B-UnknoM
VOthcr
Total
Number
Certain
7
0
r\»-/
c
L
0
t
Doubtful
0
Q
0
1
c
D
(1
0
1
Total
?
0
/
0
1
0
0
0
1
0
5"
PerCent
Certain
L.C
7M-.
e.t
CO
Doubtful) Total
Q.Q
0.0
OH
Q.0
HU
0.0
210
?o.j\m
L.J
o.o
•j c.o
m
cfi
o.O
no
li.l/
3J
OJ
10.0
o.o
mo.
J~u/vr
Number
Certain
0
0^
1
0
0
0
~T
0
0
1
Doubtful
Q
j
0
0
0
0
0
0
t
0
0
Tolal
9
i
i
0
c
0.
0
0
0
I
1
Percent
Certain
Q.O
Ml
ML
ro.o
M.
rS.Q
0.0
CO
00
im
Doubtful
C.9
Q.O
Q.O
O.O
Q.I
O.O
(l.Q
o.o
i,0
0.6
o.O
Total
0.0
an
Q.Q
(?.«•
C«i
1.6
Q.D
m.
J~oc-y
Number
:ertain
0
(
J_
Q
0
0
0
_A
_j_
T
Doubtful
0
?
0
0
0
0
9
1
0
0
3
Total
O
3
1
O
0
0
4yl
3
1
1
PerCent
Certain
u
ILL
li.l
1.0
Q.O
Q.O
Q.Q
.m//•I
UJ
Doubtful
op
mo.o
Q.O
O.Q
o.o
0.0
li.l
OJ
0.0
•33,3
Total
O.o
33-3
li.l
C.Q
o.c
Q-P
o.Q
li.l
n-i
mo.
Number
Certain
/
0
/
1
0
Q
S
0
7
/
/s
Doubtful
1
c
o
/
o
o
Q
O
ft
o
2
Total
7
0
/3
0
0
3
o
7
/
17
PerCent
Certain
Mr
ILL
ILL
0.Q
JtLl
9S.7
Doubtful
S.9
Q.O
0.0
*7
0-0
0.Q
0.0
0.0
0.0
0.0
II. g
Total
II. B
0.0
S'l
'7-7
CO
0,0
n.i
Q.O
fl-7
Ho.
Evaluation
O-Balloon
1-Astrenoaical
2-Airaaft
3-Ligtit Ptienoa.
4-Birds
5-Clouds. Dust, etc
6-lnvjftic. Info.
7-Piycho logical
8-Unkno«n
9-Other
Total
Number
Certain
/
_ / .
0
0
0
0
8
-7
n.i
S-f
o.O
0 C
o.o
II.9
o.O
Hi i
11.2
ICO.
Number
Certain
/
L
f
0
__£
0
r
0
1
L
Doubtful
0
1
1
0
0
0
0
• o
0
0
3
Total
/
7
6
0
0
Q
9.
C
?•
/
PerCent
Certain
K.Q
MMA
CO
Q.O
Q.Q.
o.c
37.5
H-7
Doubtful
o.o
M
9. 3
0.0
o.O
CO
(1-0
0.0
O.o
c.o
/2.S
Total
1.1
no
O.c
0.0
r>.Q
0.0
• 0,0
V-5
H.I
ml
Number
Certain
0
T
1
o
JL
JL
1
JL
0
<3
II
Doubtful
/
4
0
0
0
o
0
0
Q
0
Total
/
n
%
0
0
o
/
o
0
o
Pel Cent
Certain
0-0
SCO
/S-6
AJL
- M J
0-0
j£_
O-Q
Doubtful
6-1
X.o
0.0
OJ
OJ
0.0
0.0
' 0,0
0.0
o.o
31.2
Total
C2
n.o
124
Q.Q
O.c
0-0
6-3
Q.O
CO
0.0
I0Q.
Number
Certain
/
1
0
0
0
1
J _
/0
10
Doubtful
O
1
o
0
0
A
o
0
O
0
1
Total
/
0
0
Ci
1
1
1
0
II
PerCent
Certain
"77
0.0
0.0
0.0
?./'
1.1
1.1
CO
70.7
Doubtful
Q.0
1-1
0J
O.O
c.o
o.c
O.O
0.0
0.0
0.0
?•/
Total
21.}
u-<t
O.C
Q.O
Q.O
1-1
1-1
1-1
OJ
100.
121

Cases discussed

About this file

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.