PROJECT 10073 RECORD 1. oA.lE TIME GROUP 2. LOCATION Caica~, Illinois Area J . ~;~,)tJRCE Hili ta.ry 10. CONCLUSION B:..I.I.O~l .. -.. NUMBER OF OBJECTS , 1'1.;:;;,~ F.ad~ ana.!l.,sits evaluate moat 1 i.kel.,v cause as Balloon. ~. LENGTH OF OSSERVATrON 11. S~IEF SUMMARY AND ANALYSIS Two objects. 1ias first noticed 11hm pidc ed up on Grotk"'Xl-Rada. f,. TYPE OF OBSERVATION Ground-Radar !!anu vered ~. PrlOTOS 9. PHYSICAL EVIDENCE at apr:TOX 100 thousand ft. Sla-t moverna'lt. Ap~ared and d::saprear ad o!l scopa with no oonst ... ~"1t haadL'1g. r~ro SEP 63 0-3:9 (TDE) Pnlou ecliU~ ol thl fo .. zaa~ be uaetl. Memo, TDE~.f, 2 Sep 65, Request for Radar Analysis, 6 Aug 65, Louisville, Ky & Chicago, Ill ls t In.d. (TDEED/C:ipt Dunlap/pkj I 74236) TO: TJEW (Major Quintanilla) 1. !he information contained cred:~able radar analysis. in this report is insufficlent to make a 2. Although the cessage indicates the objects were characterized by slc~ ~ovement, those first sited at 2940N, 8700W traveled to 4007N, 862~W before being lost. This means the objects moved about 620 ~lM in ~5 minutes, a speed which could be viewed as other than slow mova~ant. Request this possible discrepancy be reviewed. 3. Since the objects were reported by two distant radar stations, anoma:ous propagation caa probably be ruled out as the cause. Hotvever, clar~=ication as to whether or not both stations made observ~tions siwultaneously is need~d. Additionally, it could be helpful to know w~et~er or not a temperature inversion ~vas existent in the area. 4. The altitude and described slow movement suggest the po~sibility of t objects being ba~ioons. Balloons of certain materials can be cj3:=~ad via radar, a~d N hout furthe r information concerning move- ment and/or speed are the best explanation of the observation. Lt o~ nel, USAF Act L"'1g Director Electronics Directorate HEADQUARTERS FOR~IGN T E CHNO LOGY DIVISJ01 J 1\IR FORCE SYSIE,t,4S C OMMAND UHfTS: D .STAT!!! AlA F"ORCC:: f,.fG1'4TPATTER!ON Air. F ORCE B ASi!, 0~1') .Anal.Js1, 6 Aus 65, .Juisville, Xy & Chicago, Ill TO: 'I'D!!D/Mz-Bey"Dt Re the attached mea tram Chi ADS, Truax Fld, Wia, cite CBOilf 2~5 6 Aus 5. Request radar analysis be . and conclusions re&ehed made by return first indorse- Be!C':'OR QUINTAl'IILLA; J~ Major, USAF Chie~, Aerial Phenomena Branch H::AOQUA~T2R:i CHiCA~O 1\ ! R D~::~NSE ~ ~CTGR (A, C) T~U \X fu:LD, W15CO,-JSIN 5:';7)1 UFO Radar Returns, 6 Aug 65, Louisville, Ky & Chicago, Ill Air ?orce Systems Command Fo~eig~ Tech Div (TDEW) ~vrig'ht-Patterson AFB, Ohio 1. Reference your letter, TDEW, UFO Radar Returns, 6 Aug 65 Louisville, Ky & Chicago,.Ill, dated 14 September 1965. 2. :'he position of the objects t-lhen first sited should have read 3940N, 8700~'1. The t~-10 radar sites concerned did not rnain~ain continuous radar contact with the objects. Rather the ~bjects seemed to appear and disappear sporadically. 3. Objects were observed by both radar sites during the sane time period~ however, further investigation showed that th~ sites were not de~ecting the same objects. 4. There were no k n own temperature inversions in the area at t~e time o f the ~s~ections. FOR ~rlE COMMANDER U ClASSIFIED DPAiHMEHT OF THE AUt rOR<.E SfAFf MUSAGE BRAHCH INCOMt~G M!SSAGI &18 C2 05 ZCHQA868ZCY.JXB;0 R~ HQ CHI:AGO ADS TRUAX FLO WIS RIJCCSQ/A l~ FORCE SYSTEMS CCti\~;.[j FOREIGN TECH D !V WR !GHT PA f TERSON AFB RUEAHQ/HQ ~SAF WASH 0 C RUEAHQ/ SEC~ETARY OF THE AF .;A SH 0 C UNCL,~.s CHOIN 22095 6 ALGUST 65. FOR '0 AIR DP/ ....... <'0-0IN>: HQ USAF' <AFNIN):, SEC OF THE AF (SAFOD: .~FSC <FTO) . UF'O DETECTED SY TWO RADAR SITtS REP.ORTC:O Tn CHAOS 6 A LG 65. INVEST 'GAT iON CCJAPLET~J 6 AUG 65 ... OESCRIPT ION fJF OBJECT: NUJ3 -T!VfJ GROUPS CF iWO. PERTINENT FEATURES- DETECTED 0~ ~A:AR. DESCRIPTION OF COuRSE OF OBJECT: WHY NOTICED-PICKED U? ON RADAR. POSITIOrJ WHEN FIRST DET t:CTED -rto AT 2 940N a 7a0N ,\ r A PPRox 100 THO usA NO FT L UNCLASSIFIED DEPARTMfNT OF THE AIR FORCI STAiF MUSAG( BRANCH INCOMtNG MESSAGE WHEN CONT~CT LOST-TWO AT 4~07N 8624W TWO Ai 58,6N 8549W Ai o\PPROX 65 THOUSAND FT. DESCRIPTION Of FLIGHT PATHS-SLOW MOVEMENT-UNABLE TO OBTAIN SPEED. APPEAR- EO AND OtSARREAREO ON SCOPE-NO CONSTANT HEADING. MAN~ NER OF DISAPPEARANCE-LOST RADAR CONTACTw LENGTH OF : TIME UNDER RADAR CONTACT-45 MINUTES. MANNER OF' OB- SERVAT I C~l -GROUND ELECTRONIC (ARCH AND HEIGHT RADAR>. TIME AND OATt OF SIGHTING-e6JCH0~Z-04!! "JZ. LOCATJ0N CF OBSERVER<S> 4201N 8856'N <50 MILES NW Of CHICAGO) SNaN MOUNTAIN RADAR STATION AT '757N 8600W <25 MILES SW OF LOUISVILLE ~X).,OBSERVERS-ARLINGTO~ HGTS RADAR taraZ a SITE AND SNOW MOUNTAIN RADAR SITE. WEATHER AND W!NDS- ASW ACCOUNT OF WIND DIRECTION AND VELOCITY. SURFACE- LIGHT. 6200 FT-2'0 DEGREES AT 15 KNOTS. 10,000 FT- 200 DEGREES )T 15 KNOTS. 16,0~0 FT -190 DEGREES AT 1; KNOTS. 20,~0~ rT -190 DEGREES AT 1" KNOTS. J0,000 FT -2}0 DEGR~ES AT 20 KNOTS. 50,0e~ fT -290 DEGREES AT 2; KNOTS. CEIL lNG -25,000 FTa VISIBILITY-1~ MILES. CLOUD COVER -CLEAR. NO THUNDERSTORMS i N A~EA. UNICLASSJFIED DEP,\RTMENT Of l HE f\fR FORCE ST1\FF MUS1GI HRAN<H INCOMING MESSAGE NO UNUSUAL ACTIVITY IN THE AREA. INTERCEPT ACTION TAKEN-~GNE. NO KNOWN AIR TRAFFIC IN AREA AT THAT PAGE ' RCCDAH '1 UNCLAS ALTITUDE. PREPARING OFFICER-INTELLIGENCE OFFICER, CHICAGO AIR DEFENSE SECTOR. COMMENTS -NONE. PHYSICAL EVIDENCE-NONE.