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.

Open the PDF at page 204 Original source ↗

“Roe”1 page

  • p. 190 …S £'0/? 'S t r/0fl/ Of- roe M0/ur*/i/as EvaMnon 0-BIIIOM l…
m
Evaluation
O-Balloon
; 1-Aslronomical
2-Aiicraft
3-LigM Ptxnoin.
4-Biids
S-Cloudj, Dust, etc
(-Insullic Wb.
7-Ptvdnlo|ical
8-Unknown
3-Ottier
: Tot*
Evaluation
O-Balloon
1-Astnnomical
2-Aircralt
3-Light Phenorn.
4-BirrJs
5-Clouds, Dust, etc
6-lniuffic. Info.
^-Psychological
8-Unkraon
Wther
Total
>
?.3
?
PerCent
Doubtful
$0
g$
/flg-
/
0,0
a/.*
0&u/=a
* 0&J£

Total
/
0
0
0
0
£.
0
/
/c
Per Cent
Certain
-&£-
I/LL
&@-
£JL
£.P
i££-
74.0
Doubtful
/IS
0.0
0.0
0.0
0.0
0.0
2£.o
Total
A3
0.0
£0.0
0.O
0.0
00-
00
62
/00-
7"
J
5/6/ yrtd
/9Y
Number
:ertain
6.
0
/
Doubtful
/
/ /
0
j »
/
0
0
0
/
2?
?/?
L
f Per Cent
Certain
?•£
(7.6-
00
00
/•6
/ / • /
32
6/f
Doubtful
/2-7
00
/•& •
•00
00
0.0
00
/•£
Total
22.2
f
20
PerCent
Doubtful
97
(-0
/*/
A3
0.3
00
0-/
00
as
r
Total
2/./
/6 9
27,?
1.2
/• .
Doubtfu
<9«e<i
Total
<e(?fi
Certain
••r
Per Cent
Doubtful Total
/<?</?
Number
Certain
/
0
2
0
0
2
/
0
-IL
Doubtfu
O
/
/
&
IP
0
0
0
0
0
2
ToUl
/
/
j
0
0
2.
/
$ •
0
73
Certain
77
/£</
0.0
00
0:0
77
//$•
0.0
%V.6
Per Cent
Doubtful
0~.<?
77
7-7
0~.<0
00
/?.&
0.0
(70
0.0
Total
77
77
0O
00
/£9
7'7
?f.S
ao
/00.
Certain
Number
Doubtful Total
Per Cent
Certain Doubtful Total
197

Cited by

Cases discussed

About this file

Analysis, from the classic collection. 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.