' DAT! TIMI S. LENGTH OP OIIIIVATIOM TYP! OP OIIIIVATIOM li,_uuacl-H.J.l"' r 9. PHYSICAL IVIDIMCI I. LOCATION U. IRII, SUMMARY AHD 4NALYIII bRCt:ASSIFIED 5. Rae ...-alAIU propaptlon been ~NI"Yecl to at...S the ranp ot arourict clutter '-7 Wa rwter at t;hta alte, end ctict thla cond1t1an Iadet. clur1na or near the tiM that .. tarP' obaea dt amount. o! clutt.tltt-, tlo ot~or ot nSn atoNa and ~ unknown alr~r~.i ~t \-:+rr} i.n t~" na. haw bean obH&'t eel on thle radar? UsuP..l scops weatht=tr, ~;orV.cnr, t.l;~ht.s \'ld!"!! cleurly \ .;_'3-i.~le durl.n.t' t"'i~ parlor\ ?. Wan aftTchecka to it unknoum tarpt ccnld have been one ot our 01Jil alroraft' I. Waa aD7 interceptlon att_,t,ect? It ao, pn ct.taila. 9. Vaa a Yiaul and/or AvditatJ' obsertation ada ailllltuaw&q with acope obati'Yationt It eo, pw d.ta1lec:l deecriptian. . III. SPmiFIC TA&Gft QJBSTIONS 1. Did 8117 technical pencnnel observe the unknown taraet on the Radar Scope? Han t.he7 been cpeatianed tho~ What their opinion? Yes, intt:!rrc3r9nce but of unknmm ori ein, ros~i. b'l!J sh t nborn~ r~df\-r., 2. Waa a permanent record "track" made or the taraet positions as the7 appeared on the indicators? U eo, attach to this report. (Plot. on back or paae 1.) Yes, seo att9.ched raport on back o r pagft. one, (l). 3 At what range, aw1DNth, altitude, and time wu the taraet obserYed? Negati,~ alti. tude was re~orrl d, could not tratn hei.~ht rtnl'\er on tr1c~ long enough to obtRin altltu1A. 4. How did the tarpt appear 1n aize and shape aa coqared with conYentional aircratt.tarseta? Same as normal target. 5 Waa the tara.t ot conaiat.ent aise, or did it chanp rapi.dJ7 Consistent 6. Waa the speed or the tarset constant or Tariabl.et Constn..,rt 7. Did the tara.t. appear tusQ"' or clear and sharp aa aircratt taraet? Sh3.rp. v~ry deftn~1. with a known a. What ot.ber (aircraft) tarpta wre obaer.ec:l in the . g~meral area, altitude, and aa that ot the unkn01m tara.t? Ti.me 011:.z Posit.ion CC OQ~1. ADC rona 12.3 UNt1!.ASSIFIED Pas 2 or 3 20 October 1952 DECLASSIFIED AF J ,.~ .. 12 YEARS. ~rA:' DIR 52CJO.l0 r.:..11-r IJIJ UNCLASSJFI ELl. . INBTRUCTIONB: PLOT TRACK OF TARGET, INDICATE RANGE AND AZIMUTH. GIVE 'nME AT START AND END OF TRACK AOO rona 123 20 October 1952 DOWNG'RADT-:n AT 3 YF.AR INTERVALS; DECLA lrJ!:D AFTZR 12 YEARS. DOlJ DIR 5200.10 UNCLQ.SS!FIEO Page 3 or 3 l1NCLASSIEIEQ . 1. QJISTlONS RiDARDOO DITIC'l'DO RADAR ~IPMINT 1. What. t.;ype radar eqgipMnt ia lnwlYed! A L~/ r' d-' (Search) 2. Haa there baan anT raoent enance ditticultiea? It eo, describe. 3. What. tJpe JDOdulator (i.e., spark gap, hard tuba, et.o.) is uaed in the radar equipnent? 'i'hyrll tron 4. Waa the APC (aut.c:.atic trequm07 control) circuit of the raceinr operatinJ praperl.T? 5. Haa intertetance another radar aet been observed recentl.T, and are personnel fud.]J.ar with :.he effects cauaed b7 an interfering aill'lal? 6. What. type indicators, "A scope", "B scope", etc., were used to follow tha target? 7. What t'llS the radar scan rate? 5 RPl-1 Nor~al. .:a a frequently chan ... ed durinc.:; detec tton of unusual a c ti vi ty s. What WJIIIt the approximate frequency or the transmitter? II. GErUfS.ll. QUESTIONS 1. What. were the general weather conditions at the time W'lidentitied. target waa observed? 'miles visibility, snow, overe~at. 2. What. veat~er data nearby u.s. weather stations is available on tanperature va altitude, humidity va altitude, and wind velocity vs altitude? 3. Waa the target observed by any other nearby radar equipDents? It so, give details 4. Are the operator and the supervisor familiar with the effects or anomalous (duct- effect) propagation as they pertain to this t;ype radar? DOWNGRADED AT S YF:AR IN'I'J~RVALS; DECLASSIFIED AFTER 12 YEABie J)Ol) DIR 5~.1e I:JRCCASSIFIED Page 1 of 3 11 OP lP IDI IPACa. J Hal ..-1ciU b.-oblll'tl4 to at.enc1 the nnp of p'OUiid clutter ~ \Ida at ~ d\e d'd thia r,an"itioft. aiat. dur1nc or near the 4.v :&._!le &':lount ot clutter. x-:o othor t.m. :no n aircraft ::era i n .-be a.ren 6. *-' etflltl ot ntn .... Unuaual scope .;e!\ther, Northern Li~hta . .z~re c.l.earl~, vtaii.lo ci~o.uln: t..i1ia 'I. Were oheok1 it unkn01m tarpt oaulct han been one of oar 8. Wa1 Mt7 interception att.-pteclt It eo, lin .ct.taila. 9. Waa a daul aad/or obiW~atlon' It ao, obaenation act a-ltaneouaq with acope lin d.t.ailec:l de.ar1pt.1on. III. SPBCIFIC T~ CIJDTIONS 1. Did ez17 tecbnioal perecanel obez ve the unknown t.arpt. on the Radar Scope? Have thq be1n queationed tborouahlYI What was their opinion? Yo a, interference, but of unknot~n oriLin, poaa ible ahipborne r ader. 2. Waa a pe~nt record "track" md of the targ.t positions as thq appeared on the indicatora? It eo, attach to thia report. (Plot on back of page 1.) rea, sea attached report on back of pa~e o~e, {1). ). At what ranae, ashmth, altitude, and tie waa the target obeened? i~iative altitude 1aa recorded, cuuld not train h~i~nt finder on track lon~ enou~h to obtain altitude. 4. How dtcl the tarpt, appear 1D a1 .. and shape aa ca.pared with conventional . airontt. tarpta? Sa~e aa noroal target. 5. Waa the tarpt of lise, or diet it chanp rapidlJ? Coneietent 6. Wae the speed ot the tara.t constant or T&riabl.e' Explain. 7. Did the targ.t appe1r tusQ" or clear and sharp ae compared with a known aircraft target? Sharp, very oefin~d. 8. What other (aircraft) tarpta Wl'l obHrYed in the &tmral area, altitude, and aa that ot the unknCTC tara.t.? Track ~\o. X-12-T Ident. VG 1489 Alt. 8,000ft ~L~a Oll2Z roaitlon ~J 3657. ADC Fwa 123 20 October 1952 Tiue Oll4Z Pos!.tion C.; 0981 Page 2 ot 3 I!IITRUCTIOie: ADC rona 123 20 October 1952 r---:J::::.~ Indicate PLOT TRACK OF TARGET, INDICATE RANGE AND AZIMUTH. GIVE 1110 AT START AND END OF TRACK. UNCLASSIFIED 1. ~'l'IOIIS IUIWtDIHO 1. What. t.jpe radar aqed~t. ia 1nwl:nd? Alt/r'f:J-' (Search) 2. Haa there been atr/ reG.nt. aint.enance ditt1cult.1ea? It ao, deacribe 3. What t.Jp Thyra.tron (i.e., apark gap, hard tube, et.c.) ia uaed in t.he radar equipnent.? 4 Waa t.he APC (auta..t.ic trequ.ncr control) circuit ot the receiTer operatina properl.Tl 5. Haa interte~mce traa another radar Ht. obser,ed recentq, and are perearmel. t vit.h ~he ettecta cauaed b7 an interfering signal? 6. What t7pe indicators, "A scope", "B scope", etc., were used to tollow thll target? 7. What. t'J\a the radar acan rate? 5 R?ll :rorteal. \;a. a frequently chan,ied durin6 det9ction of unusual activity. 8. What """ the approximate frequener of the transmitter? II. GENERAL QUESTIONS 1. What were the gmeral wather ccnditiona at the t1M unidentiti,ci target waa obHrved? ; ~ilea visibility, snow, overcast. 2. What veatter data fraa nearby u.s. weather station ia aTailable on t~ture ve altitude, ~dit7 vaaltitude, and wind velocity vs altitude? ). Waa the target observed b7 any ather nearby radar equipllllts? I! eo, gin detaila. 1.. Are the operator and the supervisor familiar with the effects or anomalous errect) propagation as they pertain to thia type radar? DOWNGRADED AT :1 YE n TN t'!~R"r.').~,_ .ADC Fona 123 20october 1952 DECLASSIFIED AFTER 12 YEARS.. ---- Page 1 ot 3 U~tCC.c\S31FlED lPIDI SPACI D 5 Haa ~ P"Jipt.ioil b..a to the rana ot ground clutter '-7 t.hla at, ~hl d\e, did thia con4it1on atat durin~ or near the tt. t.ha\ Wlkr.o:11 t.arpt _. obarrad! ,\v:Jra.~e n~oU~lt of c.Lutter ... \o ot.h~.u un kno .n ai.rcr,\f~ \Jertt in tha o.r.,a . 6. ~bat. etteota ot N1n at_... and 11aht.n1nl han belft obMr'fell an thia rac'ar! u oual acope ~leather, ilorthern !.1.)1 ~8 \lero clearly v i o.Lb.Le aurin.: t11i.o pariod. "/. w "re oheoka to it unknown tara.t o01ld han been one ot our 0,. airoNft' 8. Waa 81&1 int.eroeptian at.t.-pted! It eo, liTe d.taila. 9. Wu a "11-.1. and/or Aw'it.o:q obaertation de ailtaneoua] ldtb aaope obaerta\iclll! U ao, lin d.t'led de.cript,ian. III. SPICUIC TAROIT QJJSTIONS 1. Did azrr tecbnical peracanel. obaet ,. the unknown target. an the Radar Scope? Have the7 been questioned thoroughl.J? What waa their opinion? Yes, lntsrfe rd~ca, but of ont:noitn or: _in, poaaible ohipborne ra.dar. 2. Waa a peraan.nt record "track" made or the target poaitions aa thq appeared on the inclicatora? U ao attach to thia report. (Plot on back or page 1.) Yes, see attached report on back of pa6e one, (1) 3. At what ranae, as1'Mlth, altitude, and time waa the target observed? Ne~e.tt1o alt itude 1aa ra:or ded, could not train l~ei~ht i inaer on tr'ick lO:l,d e~h>U .. h to o btain a.ltituC.e. 4. How did the tara appeer in liz and ahape aa c~ed ldth confttltional aircraft. tar1.ta! Same a s nor~al t a r get. 5. Waa the tara.t ot Coneietent aiM, or did it chanp rapidlJ? 6. Waa the ape ad ot the tars.t conatant. or variable! Explain. 7. Did the taraet appe1r "tusQ" or clear and sharp ae cooqred with a known aircratt target? ~>harp, v ery defined. 8. What other (aircraft) tarpt;a were obaezeved in the eame gtmeral area, altitude, anct u that. ot the target "l 0')0ft . 'i' i':!e Oll4Z Position 0-J OS,~Jl. ADC Font U3 20 October 1952 PLOT TRACK OF TARGBT, INDICATE RANGE AND AZIMUTH. GIVE 'ftME AT START AND END OF TRACK Page 3 ot 3 On ~ Aprll 1953 be 0118Z ancl 02151 a aertea of tarpta were etpte4 'J tile 66'tb aca-aron, Cal_.t, Mtcht!!B '1'be plot orts&nate4 approxt- '-17 ,a atlea rr. tbeir atatlon, trOll 050 clockvtae to 1'1 Spee4 waa froa 1800 IIIPb to apb. 'l'bll alpttq Yal a aiibtlDI ODlJ UMI &pp!arecl noral terpt except for apeec1. If abrupt, wre notecl. 8eYeral t.nalYl4ua1 were notet. 'l'lda aqua4roa vat uaina an Ait/r'P&-3 tn aearcb ra4ar unit, vltb a 'l'h,ratron .auJ.ator. 'l'bere bad been no lntenance cltttt C\ll.tlea. '1'be wather conc1l tiona at the tiM ot alptiDI vere three allet YlalbllltJ, aa4 oft'l'caat. lortbern Lisht vere olearl7 vlalble 4ariDI tbta ,.rtol !bit la anotber ot tba better t)pe of I'LYOIItPl'. '1'he iDtelllpDCe officer la to be o~D4ec1 tor. the inlttatift abova lD u 001111ete a report . wu poaatble un4er tuc". He ..ae the preltwtnarJ e.aluatiOD at tS.. be prep.re4 the n:tort, aari.na Pro3ect Blue Book the tiM aDCl ettort it takea to 1Deattaate a allbtlns ot tbia t~ Bla evaluation V88 , "Tarpta are belleecl to be interference tr011 ra4ar orlstnatlDa on lDtwference) DOWNGRADED AT 3 YRAR INTERVALS DECLASSIFIED .AFTER 12 YEARS , UNC4SIFIED MIADOUAITIII AIR DIIIIMSI COMMAND 5NT AlA roAC5 WI COLOQAOO SIRINGS, COlORADO UNClASSIFIED SUB~CTr Restricted Report or Unidentified Flying Objects ~ Callllander Air Technical Intelligence Center ATTNa ATIAA-20 wright PSttereon Air Farce Base, Ohio In accordance with Air Forc9 Istter ~0-5, 23 April 1952, the inclosed report ot unidantitiod flying objects (AF Form 112) is forwarded tor your information FCR THE car-L\ND~: AF Form 112 Parts I & II, subj a Rept Ubidentitied F1yiDg Objects, dtd 20 A-,r 53 WNGR~\DEv A-'J '~".R INTERVALS; DO DECLASSIFIBD .A ~TZR 12 YEARS- ~-----in ~ccor~;_r!,:o with pJ.ra UNCJ.:ASSIFIEQ AIR INTEWGENCE INFORMAnON REPORT .e) rLYOIR! :.iquaJrut1, vo.lu.J1et., .. ichl~:a.n ( l}Cap\. !\\laaell !1. Klloe, It ... l. Ott!.oer ( j) veraonnal 6 65:.L'H ;s"~ SqWLuron dtci. 13 .arch ~ ~eot., (j) aoove for eouroea \ill H. r Jon troller Ja)le ;;. Dor an, 665tn A Jqdn., ~o,alu .. u:rt., . . iohi~an Richard :j. iistriok, 6 o;)tJ1 .'\C~ ~-qdn., '-'alu:t, .lcni .a.~ (L) ..-;:H-.ryt. On 20 Apr1.l l)i5' between ~018 ~ST O.ilcl 2115 w t a oerie11 t tar ,Ad t.a \Htre ai ;ht"cl b7 t c1e 665tn J,..;."'ilil s~uadron, i;a1~et, ..ioHi '\) .!.i.e t'lota o1i._::ata ap .roxl.llately 50 ~ilea o\lt tro:1 the tJta.t.1on, .t.ro,a 050 clocic"~t1ae t.o 2,1 Speed ~-.aa tro:a 1800 Ql1 per hoW" t.\l 8,4oo :ailda per hour. 'J.'u.r _ttta are bel1oved to be Lnt.,rfBrenoe f ro:1 anLpuorne ra.d:tr, Ot' .;Lntt. t.1n& on La.:,e Captain us Intelllzenc Ottlcer LH)\', t;l!:'dJEl} J,... /~AH. iNTERVALS; .UECLASSlFl~D l'\it'T ~R 12 YEARS. Orlg. 'lnd 2 oy AF POIM111 APIIIIICNID I JUIC , .. AIR INTELLIGENCE INFORMATION REPORT 1\.&Qet lilo 11 il. Kllae, Intel. Oftloer (11) "P!treonn.l 6~tb Ac&~ ron 11\loa ot ~ l'on 112 (.U.r Iat.elll~noe InfoJ"!:Qati~n rleport)Poraa 12' See :;eo\ 11 -Oapt.. Ja:~ea ':1 .&..or;JaD, 665\b AOil ~quaoron, O~lWDet, H1oh16aa ~none '1 or 6. ~bit Oontroller A/2o R1ohlll"cl a. lletr\ek, ~\A deW ~qcln., Oalwaet, ~iloai~an rnone 21 OJ' 8 Radar ObaerYer A/lo !lillr F. Oo,..,., 6~\b AO&ill :lquadron, Calu:aet, ~iiohl.ci&G Phone 21 OJ' a Radar,Obaei'Yer Crew Oblet. On 20 April 195' between Oll8Z ani 021'Z a serlea ot target.a were a1ght.e4 by tbe ~t.h JJ;IJII :3quaclron, Gt~.1u-met., iilon1gau. The plota orgl"Dat.cl approxi:.tal7 5 0 all o\1'\ frow the stat.ion, fro 050 olookwiH to 251. ;)peed '"" fro~ 1eoo mil .. pr houz to 8,4oo aile per hour. Tar~\8 are believed to be 1nterfareooe from ahlpbor e raclar, or~nating on Ike Superior. The fDllow1ag 1Dforma\lon 1s the traok nuabera aD4 r~pot1Ye plota.