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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.

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“The Sun”19 pages

  • p. 3 …Advanced Study of the Data 16 Position of the Sun Relative to the Observer 16 Statistical…
  • p. 5 …Object Sightings by Angle of Elevation of the Sun, Intervals of 10 Degrees of Angle . • , 57…
  • p. 14 …In addition, the inclusion of certain data relating to the evaluation and bearing of the sun…
  • p. 20 …for the uncommon natural phenomena associated with light reflections or refractions, such as mirages, sun dogs…
  • p. 24 …Position of the Sun Relative to the Observer The first thing that was done was to…
  • p. 63 …The difference between the longitudes of the sun and the observer was taken, and.called the…
  • p. 65 …90 +60 +30 Angle of Elevation of The Sun -30 -60 - 9 0 FIGURE 4 0…
  • p. 66 …is greater than the declination of.,the sun at the summer solstice, so that it would…
  • p. 68 Group 5 — Night sightings for which the sun was more than 10° below the horizon and…
  • p. 84 …the sun was either above the horizon or less than 10° in elevation below the horizon…
  • p. 85 …It is interesting to note that two of these were established as mock suns on the…
  • p. 91 …It reappeared and was seen flying back and forth across the sun. At one time an…
  • p. 266 …SKETCH C The sun and the noon are shown below as they appear in their correct…
  • p. 279 …IF you saw the object during DAYLIGHT, TWILIGHT, or DAWN, where was the SUN located as…
  • p. 280 …Did you observe the object through any of the following? a. Eyeglasses Yes No b. Sun…
  • p. 299 …These cards (and the corresponding WORK SHEETS) contain data from several sources. Columns referenced to the…
  • p. 300 …the Sun 5. 15. U7* U8 U9. 5o 5l^ 53 5U 55^ 56* Group Classification Sun…
  • p. 301 …00° CODE U8-51 SUN BEARING ANGLE (Calculated) CODE 5l SUN BEARING ANGLE X Y 0…
  • p. 307 …the Sun - 5. 15. U7* U9. 50 51* 52* 53 5U 55* 56* Group Classification Sun…
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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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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.