Documents / Analysis
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.
U. S. Air Force Technical Information Sheet Question Punched Card Column Code Description 3o hi U6 75* 76* 77* Hour Angle Angle of Elevation of the Sun - 5. 15. U7* U9. 50 51* 52* 53 5U 55* 56* Group Classification Sun Bearing Angle !rime Units Duration of Observation Group Classification Hpw Observed 16a » 16b, 16b. 17. 19. l l a * l i b . 39. 17. 1B.-.2U. l l f , 21. 22. 2U. 10, l i e * 5. 1 1 , 17. 20. 33. 29. 31. 1 . 23. 30, 31. 2. 31. 32. i?7* 58* 59* 6O«- 61* 62* . 6 3 * . 6U* - 65* 66* 67* 68* 69* 70* 71* YZ* 73* bound Object Color Light Color Physical Color Group Classification Number Speed Shape Description Size •Light ferightness Angular Velocity Angular Acceleration a o ^ l o n Appearance bearing Disappearance Bearing I n i t i a l Elevation „ . A . tfinal filevation D u " c i l p t l orientation Maneuvers Observer Occupation Observer R a t i n g O b s e r v e r Heport Rating Reliability Group Classification Final Identification Denotes that separate code key is needed. 312
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.