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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.
“bright lights”16 pages
- p. 4 …of Known and Unknown Object Sightings by Light Brightness, 1947-1952 39
Figure 24 Comparison of…
- p. 5 …Knowns Versus Unknowns on the Basis of Light Brightness 67
Table VIII Chi Square Test of…
- p. 23 …On the other hand, the
percentage distribution of the light brightness reported by each observer
is…
- p. 47 …23 COMPARISON OF KNOWN AND UNKNOWN OBJECT SIGHTINGS BY LIGHT BRIGHTNESS,
1947-1952
A-75 01
- p. 75 TABLE VII CHI SQUARE TEST OF KNOWNS VERSUS UNKNOWNS
ON THE BASIS OF LIGHT BRIGHTNESS
Light…
- p. 76 …In the sixth case, Light Brightness, the
classifications are too nebulous to be of real value…
- p. 77 …for a number of these UNKNOWNS.
(6) Light brightness , .
Since this chi square was not significant…
- p. 83 …VERSUS
UNKNOWNS ON THE BASIS OF LIGHT BRIGHTNESS
Light Brightness
Number of
KNOWNS
Adjusted X ,
Number…
- p. 110 …Evaluation of All Sightings for All Years by Light Brightness 210
Table A166. Evaluation of Unit…
- p. 265 …Light brightness
h. Motion
0. Other
13« How did object disappear from view: Suddenly or Gradually…
- p. 273 …6 Give off smoke?
lU.7 Change brightness?
lU«8 Flicker, throb, or
pulsate?
lU.9…
- p. 292 …8 - 1.0
9 - Other
CODE £2 LIGHT BRIGHTNESS
X - Decreased in size
Y
0 - 0…
- p. 297 …52*
53*
19 5<U*
55*
56*
57*
58*
59
60
61*
Light brightness
Angular velocity…
- p. 300 …Color
Light Color Physical
Color-Group
Classification
Number
Speed
Shape Description
Size
Light Brightness
Angular Velocity…
- p. 302 …to 10.0
9 Other
CODE 65 LIGHT BRIGHTNESS ( I n t e n s i…
- p. 309 …elevation
Disappearance Bearing
Angular Acceleration
Light Brightness >s—
Shape ^—
Number ^ —
Light Color ^
_ . ~ ' N—
S *• „ Group
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STUDY NO. IO2-EL-55/2-79
ANALYSIS OF REPORTS OF
UNIDENTIFIED AERIAL OBJECTS
PROJECT NO. 10073
5 MAY 1955
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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.