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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.
“Punch”14 pages
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
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.