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.
“US Navy”1 page
CODE 67 RANK EQUIVALENT CODE 76 EVALUATION OF OBSERVER RELIABILITY t X Y 0 1 2 3 U 5 6 7 8 9 Officer Lt. 2nd Lt. 1st Capt. Maj. Lt« Col. Col. Brig. Gen. Maj. Gen. Lt* Gen. General X Y 0 1 2 3 5 6 7 8 9 CODE 77 EVALUATION X Y 0 Complete 1 Quite 2 Fair 3 Doubtful 4 Poor 5 Not 6 7 8 9 Can't be Private Private, 1st Cls. Corp. Serg. S, T. Serg. M. Serg, Warrant Off. Chief Warrant \ OF REPORT RELIABILITY judged CODE 79-80 FINAL IDENTIFICATION X Y 0 1 2 3 4 5 6 7 8 9 CODE X y 0 l 2 3 5 6 7 8 9 I Complete Quite Fair Doubtful Poor Not Can't be judged 78 PRELIMINARY IDENTIFICATION Possibly Balloon Astronomical Aircraft Light phenomenon Birds Clouds, dust, etc. Rocket or missile Psychological manifestations Electromagnetic phenomenon Other X Probably Y 0 Balloon 1 Astronomical 2 Aircraft • 3 Light Phenomenon U Birds 5 Clouds, dust, etc. 6 Re»ke%-eF-a49eile Insufficient information 7 Psychological manifestations 8 gle&t.Fe»agRe*ie-pheReaeHeR Unknown 9 Other 295 and 296
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.