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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.

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“meteor”14 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. 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…
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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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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.