Project Blue Book Special Report No. 14: Analysis of Reports of Unidentified Aerial Objects

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.

Observer's
Data
Sheet
Question
WORK SHEET
Punched
Card
Column Code Description
2
3
h Serial No,
Serial No.
Incident s e r i a l
number
Insertion
1.
7
8
9
10
32*
33
3U
35
36
37
38
39
UO
Day
Month
2.
3.
li.
11
12
13
1U
15
16
17
18
19
20
21
22
23
2U
25*
26
27
28*
29
30
31
Year
Day
Month
Day
Month
Hrs.
Min.
Time Units
Duration
Latitude
Observed
Reported
Rec'dATIC
Time of observation
Greenwich C. T.
Duration of
observation
Location
Longitude
Cosine latitude
* Denotes separate code key i s needed.
299