J'J 3J.~C'T: HE-ADQUARTERS LG'vVRY AIR FORCE BASC: 3415TH TECHNICAL TRAINING \NfNG UF:..NVER. COLORADO Uncon7entioru:tl \ir~r-.:lft -"~lying Dis ; C Ollt:n.:tn d in~ Goner~ 1 ;.fright-")~ ':t3r son Air Force Basa Dayton, C'!-lio l:14J, '.~.;l1.tiv3 t0 :f-l:'1rt of un~t~nvsntioffil aircr .llt .7~i.J~l '.13.3 icen~ified ~\!3 U. S . ,.f-3athar b'llloon, inclos~:l is final 1n:Jort ;..JJ. r .. ~:u 000. 9 - Z i'ro;:a ~Ul 1 :.vhPl-:trt;er:;. G \ J:1 ln=I..tiry ~"Lon"Jd a~ t1iJ bcct3~. T~1l3 re?o:-t i::: B..9 JOrt lio. AP?ROVZI: l JUI-:!: 19LC -FBcr-(A:c-:rcY)-- n:::POP..T l' :s:q 3415th TT Win g. Lo'.vry ,tFB, Denver. Colorado I .A?3 000.9-2 1-'l\Gt.: (3) Rs.da.r o bservations with A.?Q 13 were noc m.ad s ::~.t any ti..~ on b .\0t..ivitids o1 U. S . -Teat.o.ar 3ureall Station at .:itapld~...l F:ieJ..dSJ Denver. Color ado' (1) Sur 1'a c e obse rvation.s (te l a -type visibility unlimited. sa quenc ea) ind icata clear s :cys ~ ( 2) Upper air obs~rvat:.On .cons i 3 ~n-g_ or trao:ci;).~ of a "Neather bal- loon tlirough optical mt:ums waa condu c ted from 2003MT to 2029::MT o (This ~oti vi ty i3 i'ir:nly be lia vad to o e tb.tt '; <iU.S e for re por -ci:l.6 ot object ob sar"led. b y FBI Ag~nt and -rl tne S39d. ) c . Anal ysis of W"31:tther by Lowry .\FB Weather Officer f"r zooam hours, 6 April 1949 iaJ Sky con dition c l ear, visibility 40 miles or more . winds a loft 15 th.ouss:.d fset West N~rt1rnest, 25 knots becoming North Northwest 4:0 knots at 25 thousand f set. (See att ached feathe r 0fficer's Re~ort). Looa.l flig!l.t a onedu l a e o f in "Vi.oini ty a.~ the time: conuneroial privata and military airora.:ft flyi:1g Information pertinent to this matter,_negati7e 4 . Release-of testing d svio ~ -jn-~vf~ini ty -sant a loft by varioua org~ni ia- t ions: :i9ga.ti v a inf'o.rma"tion e::c~ept for items reported abova. 8. See OSI Report .. . 1 Jti"Z 19~r Hq 3415th TT 7/ing, LOIT~f :;:a-lnne r oi' Disaoo~aranoe: Relative to the Obser ver 11r. ~ Special Age1t, !4' BI , Denver Ot.r"ice. :) S I Re port for further details of obsaner inc ludi:lg !la."D.es_. dresddS and .statensn t s of wit:1esses. _Rslati v e t o Rada~ .Sis_:1ti~S' 1. :tadars operating on grotmd~ a . Det. _\., 3303 D, Rada.r Boni> Scoring SqU3.dron, attach l:ld t o LCJ'Irry ..:\F3. Nas o para ting for a 12 nour period. o oJ.menoing at 1300 hours YT. This unit ;va s o~r3. ting a ground radar aet SCR 584 on a oombination searoa e n d -c~cki.ng b'lsJ.s. Sat operg,ted in "s Bam at s.vp roxima.tely 3000 maga c yclas. No tUJ.Us~l objeots nocad i n scope. o Cor m of interferenc e anootn:tt;ersd. b . .icti7ititl S of Air National 8-uard and ~Tav.al .:reathor Section at :auckley ~l! 11 ~ Color ado t Nona. o . 1I'o othsr a.o-eS Ye uni t s d eter minsd. d . Rocky Mount.in. ~senal. not firing on targets in e-v~ning e. 1910. AACS Squadron attached to Lowry -~B reported negative jnfonnation o n their. ins~runei!~s. du..-r.:i.ng time involved. (Se e at- tached re_por t ) . .. . Teletype sequences of l o.ca.l weather conditions~ (For Lowry .AFB. a nd u.s. Weather Station,.. Stao leton Airfield , Denver, Colorado, attached t o repert of LowrJ AF3.Weather Officer.) Tin d s ala~ r eoort1 a. ~0ti~ities or De~. 19-3, 13th ~e~ther Sauadron ~ttached to Lowrv !FB, i3 a a fol low 3ur fac~ ob serrations (~a l.atY?e 7isi0ility unli~itad. Co9y o~ t o l350M wh e n o alloon ru.rs~. Sa-c tur:1ed o:';.."' .?..\; 1355:. Sat oper a ted on 403 ~ega~ycles Ni n o evidenc 9 e f erfsrsnce. Copy o1. u:;>per ;vind report (R.ti'I:DI) a-ctached t o .rea.ther Officer's Repor.t. . . APPROVED 1 J~E 1 9 48 ( jUss!?!CATION)" FP.O .t;. n.cv F.EPC'ItT N") .. Bq v"1:l._:\ -;n I~ ifin6~ Lowry ~L73, Denver, Colo:rsd'=> PP.GE . l sJ.~:ttang: ~odnesday, d Ap~il 1 349. 3 . -:11')9r~ si~hted (observe r r s poJi:.ion): Fro.11 par'ring ::1.r-1a J..t. Stapleton A.ir:;>o.::-t , (.lunici?al Airport). ~aver, Colorado. Obs$rlsr :vith :113 -vti.fa dl3mounted i'ro;n a.utom.obila to make observ-.ition.s and collected sevY3ral V~ritnesses from ol;h9r :notori.~ts. Ooordlnates for Sta?laton Airfield are a_?pro:rirrv3.tely 39 Horth .. 104 53f West. 4.. Uumber o:f obji90t3: Ona -w:rich '"Nas r o-;md s:J.aped. Obser"7'B.ble calss bial phenC'r.lena: Lowry ..&.i:-F'Jrce reports survay of astronomical phenomena r e veals pror;d.nent celestial p hanom.3na. B~::;s laa.ther Officer no o \is ~.~aLii.' J ::1g or Distance of objeot .from observer: Estinated 4 mile3? altitude 15,000 .About 15 min.~ as. 7. Tirm in sight2 .Appearance of objeo.i;i Object dar x colored, with a s;nall bluish# y ellow light trailing . Dasori p tion of object by obserwr reasonably-ooincidea With. description of'. u. s. Weather Station balloon sent up f'.com Stapleton Field_. 1raather .balloon used -was black, ~.100 gram. size , wi tu -~ stand ard ~ f'l,'lsh ligbt batteries .wire d tog9ther withal ordinary flashlight bulb sus- pende d underneath. Lowry A?B 'Wea-ther Offi c e r estLllS.tas size of balloon to be. appro:dmately 4S feet in diazoo ter wban :released on the ground, about 6 feet in dia.ieter at 20,000 .f"eat, and a feet jn cli-?.metez:. at 30,000 feet, 2.t which al ti t a d e it broke. Visibi lit::rb; the na:<:~d eyr3 C0 ..ll1 not b e much OSI oonducted identific ation ?ositiv9 id~n~ii~oa~ion U. s . test by obser~er 1f:3e. the r balloon under identio&l con - made 8 .. ipril 1949. ~c 1 ~ -lJlOtn .llt~S Sq. I.:1cl 3 -St.9.\;iocl ueatber Ofricar's ~eoort UNC:l.ASSiFlED .A::t3.-l. :tE:PORrED C~ ii'HOi ( .t -er.cy) 1 .. 'J:a l~th Di3::rlcc 'JSI, ~u,.Yr>J -~ :or~e 3ast , ),;c:r:3r, .; o lora do, r3- G-::1l:Tsd r:3? 0r t 7 Apri 1 l 343 fro.n F3I .lge.nt t n a t a t aoout of J:a.9l:3~on .?iald (:~1tJnloipal ~irport), Denv.3r., CJlor::.do .. -rr!1lch :1.:3 -c~ough.t .:li:;;ht be a f lying d .w ~. ,>os::lr"'ntion bei:1g made frn l :_:;ar:-:i_:3.6 a r e a a t S-capl3ton Fiald .. i::e c ollected ;H:tV::Jral ritnes s a 3 to obdr-ve objsc: .. Jbject ,,as reported at altitude o f 15,000 ~.., 2 5,000 faet, trav elli n g east-'r? .. ~"l ~-r.J..i g_9.ini~ a ltit1d'"1, :"i.0.ally f'adi:1.g fro,J. :rl.!i'W~ OSI investig~tad =~11 ritn:'.lsses s.:1d o-r;l')er r el:l.tad ::l:.l tte r s 2 . Wjng Intell i&~a Office ascer t?.:ined f ro:n Y~!"io-.18 :t.ssnci~ a that this 3ass's ground .r'l.lB.~ ~et SCR-584 operated canti!l,o.J.3ly :"or 1 2 hour period c omm.encing 1800 YT on oombination s earc:1 a!l.d tracki:J.g basis. Sdt operated on "stt band. approxi.-raat ely 3000 megacycle s . . No .unusWJ..1 0bjeots noted in s copa