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.
CODES CODE 1. GENERAL a. These cards (and the corresponding WORK SHEETS) contain data from several sources. Columns referenced to the U. S, Air Force Technical Information Sheet (Form A) must have at least one entry. If no data are available for any column, the Y (or 12 punch) should be used, b. Columns 22, 23, 2U, 25, 26, 36, 37, 38, 39, UO, Ul, 1*2, k}, UU, hS, U6, hi $ U8, k9, SO, and 5>1 are calculated from data appearing in the U. S. Air Force Technical Information-Sheet (Form A).'if the basic data for these calculations are not available, the appropriate columns are left blank. c. If a number in any column is used to enter data, then X (or 11 punch) qualifies the data as indicated in the Code for the specific column. CODE 7 SIGHTING IDENTIFICATION (Tiiis column may or may not contain multiple punches) CODE 22 LOCAL SUN TIME (Refers to date of G.C.T. observation) X Y 0 1 2 3 h 5 6 7 8 9 All sightings Unit sightings, all observers Unit sightings, single observers Unit sightings, multiple observers Object sightings X Y 0 1 2 3 U 6 7 8 9 Same day Previous day ? CODE 23-26 LOCAL SUN TIME (Calculated from G.C.T., date, latitude, and-longitude) CODE 27 LATITUDE CODE 31 LONGITUDE X South Latitude Y 0 1 2 3 h 5 6 7 8 9 X East Longitude Y 0 1 2 3 k $ 6 •7 8 9 303
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.