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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.

Open the PDF at page 79 Original source ↗

“meteor”15 pages

  • p. 9 …for as misinterpretations of known objects (suchas meteors, balloons, or aircraft), a few as the result…
  • p. 19 …Balloons, aircraft, astronomical bodies (such as meteors), birds, and clouds or dust were recognized as major…
  • p. 44 …mph More than 4 0 0 mph Meteor-like Not stated Unknown Per Cent 15 20…
  • p. 46 …i r 00 Elliptical Rocket and aircraft Meteor or comet Lenticular, conical or teardrop Flame Other…
  • p. 72 …434 434 Shape Elliptical Rocket and aircraft Meteor or comet Teardrop, lenticular, or conical Flame Other…
  • p. 74 …100 to 400 mph Over 400 mph Meteor-like Not stated 249 154 181 403'" 8…
  • p. 76 …There is a higher percentage of KNOWNS in the flame and in the meteor- or comet…
  • p. 80 …OF SHAPE Shape Elliptical Rocket or aircraft Meteor or comet Flame T e a r d…
  • p. 82 TABLE XII Speed Stationary Less than 100 mph 100 to 400 mph Over 400 mph Meteor…
  • p. 84 …The second was slightly increased by the removal of the astro- nomical sightings from the meteor…
  • p. 108 …Evaluation of All Sightings for All Years by Shape of Object, Meteor or Comet . . . . . . . 190 Table…
  • p. 109 …Evalua^on of Unit Sightings for All Years by Shape of Object, Meteor or Comet 194…
  • p. 110 …Evaluation of Object Sightings for All Years by Reported Speeds of Objects, Meteor-Like Speeds 209…
  • p. 291 …Meteor like Not stated Other CODE X Y 0 1 2 3 4 5 6 7…
  • p. 302 …100 - UOO mph More than iiOO mph Meteor-like Not stated Other CODE 63 SHAPE X…
TABLE IX CHI SQUARE TEST OF REVISED KNOWNS VERSUS
UNKNOWNS ON THE BASIS OF NUMBER
Number of
Objects Per
Sighting
Number of
KNOWNS
Adjusted
Number of
KNOWNS (K)
Number of (K-n):
[OWN
297
37
70
25
5
S(n) K
0 .
2 .
2 .
15.
2 .
39
52
96
36
50
1
2
3-10
11 or more
Not stated
913
142
168
34
29
308
4 8
57
11
10
Total 1286 434 434 23. 73
D e g r e e s of f r e e d o m
5%
1%
9. 5
13.3
71
! ; • ••

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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.