TI~E G~OUI COMCL.U110N Oe~r:~v~ T IOH AND 1\N.Al. YSI$ OaSERVATIOM FTD SEP6l OJ2? (TOE) ,,.YioucUUMa.,t!1laf..,.,_.1~"'d HE:AOQU\PTERS FOREIGN TECHNOLOGY DIVISlON A l A rORCE S Y ST E:-.13 COMM.\ND lt'll<:i:-1T,.. A rTCR30N Al"l F ORCE ':A.~ :, C.OII"' / ' f:J.j H Ouint3Ililla, .Jr/b92lb .. s e aJ:cr:neau-e.3-: r ryr Rado.r tnaly:sis R~fe =~ t~c attached ~sg fron Chlce30 fi..eC. o'::>j ect on 26 Jul 65. Re~est your :f':Lrs~ i."'liorsement. Aerial Pheuo:n:=!le =r3.nch 2:=tc Ind (TDEED/Mr .' 'Brya:tt/ clh/74201) TO: TDEW (Maj. H. Qui~tanilla, Jr) o.n:tlysis by retn !-n The evidence submitted i n this report (CHOIN 22000 26 Jul 65) is too meager t o allmv a firm evaluation to be made. H.mo~ever, by a process of elimina- tion it appears that the speed of the target v1as too slmJ for a r.1eteor , but the speed and altitude are compatible for a high perforrronce (possibly experimental) aircraft. Ther e being no reason t o consider the targets as false, or the radar as malfunctioning, the high performance aircraft re- mains the most logica l explanation. ,j;atm W. VEGA Lt. Colonel, USAF Act g Diractor Electroni~s Directorate Deputy Eor Technology and Subsystems U~CtJ\SSlfl0 De? UT,'~HH OF THE AIR fORCE ST MF :.1 CS S~GE B!UN(H INCO ING MiSS~GE ACTION: w.~-S-! DE RUCDAH 4l ~072207 :rJR uuuuu ~:1 HQ CHICAGC ADS TRUAX FLO \viS fO RUWGALE/ AI.~ DEFENSE COt"1~1 .lD I I I I~ I I RUCDSQ/ AIR FORCE SYSTEMS COM~ A~ ~u FORE I GNNE DIV WPAFB OHI 0/ H(~ HU~AHQ/SECRETARY OF THE AF WASH D C L;\JCLAS CHOIN (30,.01N); HQ USAF <AFNIN).{SEC OF' AF DESCRJ?!ION OF OBJECT: NUMBER -O~IE. PERTINENT FC: .. ~TURES -DETECT2D ON RADAR. DESCRIPTION OF COURSE OF OBJECT. WHY NOTICED -D!CXED UP ON ADA RADAR. POS[TION WHEN FIRST DETECTED -4210N !7.8630\11 AT 100,000 FT. POSt! iON WHEN CO ITt\CT LOST -4140N 08220'.:1. fLIGHT PATH -5 HEADING AT SPEED OF OVER ONE THOUSAND KNOTS AT ONE dUNDRED T40!JS~ND FEET ALTITUDE: .. i~AN~IER OF DISA?P2A.{t)\ICE -LOST RADAR CONTACT .. LENGTH OF 1!M iN SIGHT - te UNGlASS1fJED OcP:t.HMcNT OF T!IE ~i~ FORU . STArF MESSAG RR CH JNCO'AIHG ~ESJ~GI Pag~ 2 ot" 2 ( LOWPOWER SURV E! LLANCE>. TIME & DATE K26/02.30-0240 Z. LIGHT CO~DI!IONS NIGHT. LOCATION Of OBSERVER- AI OR 14 MILES WEST OF O'HARA A/F. OBSERVER ... ~xM.Y AIR DEr!NSE f"liSSILE SITE ( ARADCOM SITE C-72) .. ST IM ATE Or R ELI ABILITY -GOO D. AS'JI ACCOUNT OF WIND A~lD VELOCITY. SURFACE -CA11'1. 6000 rT - ~e0 DEGREES AT 10 KNOTS. 10,0 00 FT 310 DEGREES AT 25 KNOTS. 15,00~ FT -310 DEGREES AT 20 XNOTS. 2~,000 FT -300 DEGREES AT 40 KNOTS. 30,000 FI -290 DEGREES 000 FT -230 DEGREES AT ~0 KNOTS$ 80,000 FT -090 DEGREES AT 15 KNOTS. CEILING VISIBILITY-15 MILES PLUS. UO CLOUD CO\JER. NO THUN- DERSTORMS NOR UNUSUAL ACTIVITY IN AREA. INTERCEPT ACTION TAKEN -NONE. NO KNO'.JN AIR TRAFFIC IN AREA AT THAT ALTITUDE. PREPARING OFFICER INTELL!GAENCE OFFICER HICAGO AIR DEFENSE SECTOR. PRELIMINARY ANALYSIS Or POSSIBLE CAUS~ OF SIGHTING POSSIBLE TEST AIRCRAFT OR MALFUNCTION OF RADAR. NO PHYSICAL EVIDENCE AVAILABLE.