Evidence Explorer

…ations and analyses regarding unidentified aerial phenomena, with a focus on distinguishing between potential weather balloons and other objects based on radar data and visual sightings.

This document outlines the responsibilities and findings of Project 'SIGN', which was tasked with investigating sightings of unidentified flying objects (UFOs). It includes a list of incidents that may be attributed to balloons, indicating a systematic approach to analyzing UAP sightings.

…y other instances, these observers cite their flying experience as qualification for their ability to observe and report details. AMC Opinion: From the limited data furnished in this report, it is difficult to arrive at any conclusion. If the object was actually 10,000 ft distant, and yet appeared three feet wide to the observer, it would of neces been huge.…

… for their ability to observe and report details. } ° Opinion: From the L Aner u 9 CAl ALA been huye. ae rey te s+- ryt, tra! UiOn Svatve ob be ele Lila imited data furnished in this report, it L to arrive at any conclusion. If the object was actually 10,000 f yet appeared three fcet wide to 7 $a . se pa pe Sn ue bd tid nn SoS Een Pe oe gre jt 4 +) This sole…

… objects in order to see to what extent these reports oan be explained in terms of known psychological facts and principles. Scientific Method and a Posteriori Data A word of caution mest be injected at the outset of this report, Certain conditions are necessary for drawing valid scientific eaclusions. GO Ms 2-0 8 8S TAL Declassification Authority: NND 57565

CORPITORAT LAL Engineering Division Memorandum Report Noe MC REXD=69l.-18D 26 April 1919 These conditions are largely lacking in the case of the data available on unidentified flying objects. It is impossible to say with any assurance what any partioular individual in this series of 2¥2 reports was actually observing at any particular time, t is only possibl…

…, 1945. 4, "The Milky Way", by Bok and Bok, Harvard Books on Astronomy, Blakiston 1941, SS. Calculated Properties of Hydrogen Propellant at High Temper atures, Data provided to RAND by Dr. Altman, then at JPL. Unpublished. 6. "The Use of Atomic Power for Rockets", by R. Server, Appendix LV Second Quarterly Report, RA-15004, Douglas Aircraft Co., Inc.,Project…

…lligence Officer onan ceil Co (aan iS Bian Bilan. nS Wd ot .. Re oe pra me ae DECLASSIFIED £,0, 11652, Sec. 3(£} and 5{D} or (&) USA .MEMD.... JULI? Rrrree sis Data Ybsosp \ eke Basen te eet ance ate wale tes ete piped. cena ove 3 elell ie HS peal §. et “UST, S UTiGM BY ORIGINATOR Diractor of Intelligence USAF CG, EIGHTEENTH AF ATIC, ATTN ATIAA-2e WRIGHT PAT…

…bout three seconds and appeared to be at a heic five thousand feet. It appeared to be the size of the full moon estimating the actual size or other comparative data, its position in the sky was about 45-509, fae ace ee ih a i i aR Rea ee Se tah and during its course, emitted no nopiceams sound, « Group, observed (with his wife) a large green light, solid in …

…ed to be 3000-5000.:. . feet, bt this estimate is subject to considerable error as thers was no means of estimating the size of the object or other comparative data, Position in sky 45> a ; 50°, 4 i 5 4 ad ii a : { ; 4 [ : | ; | : at Muroc 8 % TF Im | AFB (Fdwards) and was assi; ened as interviewer and observer on projec RI? : . or Air Materiel Command. Capt…

AF FORM 112—PART I cence ye (Guassirica i E | APPROVED 1 JUNE 193 auiril aha | <P RERORPNTT Se Se eo" SI LEAVE BLAR v [ | UNTTED STATES . a ee He Ps AIR INTELLIGENCE INFORMATION REPORT ‘SUBJECT YSRPT AREA REPORTED ON FROM (Agency) a 4 re » Aibany, Georcia eau Wing Intellisence DATE OF REPORT DATE OF INFORMATION | EVALUATION 3 Febru 1953 28 Januar ? r- PREPAR…

…¥Aant Deputy for Operations bas hl Oy io ge Ii te i aie ot Ml i bee ae ik ae ee oe er ee “ DECLASSIFIED E.0. 624 Sec. 34) and pas Aft a of 5 Af. 10 cy yy 2§ ae Data ~~ : ~) if a e INCLS. l. signed statement ee Sketch of point of observation ; ne — — -— —— ———s DISTRIBUTION BY ORIGINATOR D/I, USAF - original D/I, ConAC - 1 cy ATIC, Wright-Patterson - l cy D/I…

…t the object was much farther and i hig! her than estimated by i ee PEOCT ASS ip 5 } i t DECLASS! Lik BAY a te eg ' § id fat fm Sich OW oR Mie nn, fo MUA NARS, Data oN paste, “USAF 1 ae 3 ae Wg Ing & Opr Officer v abe ff ms / sy fe us Set men rie bea m) ro ts tallest ROMA, Dee cD ars; : é 1, Statement 0 EL 22) “ Das . 2. Mep diagram (quad) : tps "| BSSUTION …

…a ee aie pers @fcis am ea Rite WA eae hee aa Me bee 3 he bk PD MANNE “4 uy DUSAHVATION CHA VISUAL CMA PiGw 6! URD Fo RO ey cay tw Eh to ae ; ail Bods 2 aa te a data © dae (ode pee 2 [kde VERY y rh ib ry aly 7) yl eh oe ee a Be ELI y oe ad cna 94 ‘#Q ue & i Map dh itive Bu Pie 9 | _ i : A , 3 a oe * Pty ee ‘s Spahr & tye . ¥ t ¢ ee 25) ah | cn e ont A og gh ‘…

…degrees» Grid coordinates of station are HQ 0202 and target was at GQ 490khe No height finder equipment is available but estimate of altitude using calibration data showed target to be at approximately 1,000 feets 5¢ Observers of object, 2nd Lt Harold S Eagle and A 10 John T Mandinec are considered fully reliable and experienced, 2nd Lt Eagle has approximate…

< = _AF FORM 112—PART a APPROVED 1 JUNE 1948 oF COUNTRY ~ U.S.As SUBJECT FLYOBRPT , ass of Unidentified Flying Objects_ AREA REPORTED ON FROM. (Agency) Lake Huron and Northeast Michigan _1/5k4th AC&W Squadron, Port Austin, Michigan DATE OF REPORT DATE OF INFORMATION EVALUATION 27 February 1953 17 February 1953 _ . L-5 Bes ag era Ae ty she St PREPARED BY (Off…

RADAR OBSERVATION DATA SHEET TIONS REGARDING DETECTING RADAR EQUIPMENT at type radar eq is involved? ay a A DO AN/T fo —% maintenance difficulties? If so, describe. p, hard tube, etc.) is used in the radar equipment? trol) circuit of the receiver operating properly? erence Irom another radar set been observed recently, and are personnel th vhe effects caused…

AF FORM 112 APPROVED 1 JUNE 1248 COUNTRY @ (1) Vem esis (13 CRE] (CLASSIFICATION) REPORT NO. (LEAVE om eee { ry > ce) Mer T =. OP” , AIR INTELLIGENCE INFORMATION REPORT SUBJECT (*) Re DOr: VV AREA REPORTED ON = . ) s2eWweenaw oO WOU GS Lich FROM (Agency) wr (Oo) 7 ~ Mi chi =5¢ ee } ( J U ae j ne bees AE oe | VODUN AYvocH ed OF REPORT ( Gs f ) Ot) PREPARED BY…

ae AF FORM 112 (CLASSIFICATION) =——t*” APPROVED 1 JUNE 1948 » COUNTRY : | ats BUAY nd REPORT is | hes 3 BL. 2G JA/ Alk INTELLIGENCE INFORMATION REPORT AREA REPORTED ON | FROM (Agency) DATE OF REPORT | DATEOF INFORMATION ~— EVALUATION | PREPARED BY (Officer) ‘ | "| SOURCE Wi Po yrareaerw reg ered : ; ; . ’ . A ; ; LA ° d et SE v4 " [ - Vie Oh REFERENCES (C on…

Analysis of a UAP incident over Cheyenne Mountain, Colorado, observed by U.S. Army service members, suggests the object may have been a result of backscattering of sunlight rather than an unknown aerial phenomenon.