Documents / Report
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.
“The Advance”3 pages
LIST OF ILLUSTRATIONS ' (Continued) Page Figure 38 Comparison of Evaluation of Object Sightings in the Strategic Areas of the South Farwest Region 54 Figure 39 Diagram of a Celestial Sphere 56 Figure 40 Frequency of Object Sightings by Angle of Elevation of the Sun, Intervals of 10 Degrees of Angle . • , 57 Figure 41 Frequency of Object Sightings by Local Sun Time, Intervals of One Hour 59 Table I Object Sightings 60 Table II Chi Square Test of Knowns Versus Unknowns on the Basis of Color 62 Table III Chi Square Test of Knowns Versus Unknowns on the Basis of Number 63 Table IV Chi Square Test of Knowns Versus Unknowns on the Basis of Shape 64 Table V Chi Square Test of Knowns Versus Unknowns on the Basis of Duration of Observation 65 Table VI Chi Square Test of Knowns Versus Unknowns on the Basis of Speed b6 Table VII Chi Square Test of Knowns Versus Unknowns on the Basis of Light Brightness 67 Table VIII Chi Square Test of Revised Knowns Versus Unknowns on the Basis of Color 70 Table IX Chi Square Test of Revised Knowns Versus Unknowns on the Basis of Number . 7 1 Table X Chi Square Test of Revised Knowns* Versus Unknowns on the Basis of Shape 72 Table XI Chi Square Test of Revised Knowns Versus Unknowns on the Basis of Duration of Observation 73 Table XII Chi Square Test of Revised Knowns Versus Unknowns on the Basis of Speed 74 Table XIII Chi Square Test of Revised Knowns Versus Unknowns on the Basis of Light Brightness 75 v and vi
Report, cited by the archive. The PDF is mirrored here; the original link is above. 309 pages are in the text index: search them above, or from the library's search.