PROJECT BLUE BOOK

uctaxaele = UNCLASSiFiEp TCB pa? ey ariate
fd (6°

Reference is made to SAC wire DIC 12660 dated 10 December to
your head.juarters on unidentified flying objects. Information in
reference message ia confusing. It is Tepesaitae. to ascertain
whether the sighting in question is the same as that reported in
messa:;@ 3 AD-DIC 3993 dated 10 November from CG Third Air Division,
South Ruislip England, or whether it is a different sighting.

SAC messa: 6 states that sighting occurred one week previous to
17 November. Date of sighting reported by Third Air Division was
8 September. Sugrest your headquarters get more dotails from
Third Air Division. Their message of 10 November stated that a
full report was boing prepared. To date this report has not
been received,

J J Rodgers MCIAXA-1la as

UNCLASSIFIED

Received IR-1-50 containing info on unidentified objects detected by
radar in Great Britain by the Third Air Div. It is the opinion of AM

Intelligence Department that the radar echoes detected were the result of
ebnormal weather conditions. Letter with more detail will follow. In the
event your Hg considers an on-the-spot analysis is warranted, suggest Major.
Harpster, now attached to ADI Science in London be instructed to visit
Heston and mike @ complete investigation.

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DESCRIPTION, DATES, AND SeagL E0139 RT-OF-tme

CONVENTIONAL AIRBORNE: OF JECT

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UNCLASSIFIED

oo

Sars ets * eee a oh ae oe Phe i ag
| NAME SYMBOL
J J RODGERS MCTAXA-la

— eee . we -

AF FORM 112—PART Il Qe

APPROVED | JUNE 1948

| , UNCLASSIFIED
AIR IN/ELLIGENCE INFORMATION REPORT

(ROM LAgracg)
Deputy Chief of Staff, Intelli- IR-1-«
genes, Hq 3rd Air Division | 30

» US Air Yorce -

REPORT RO.

pact? one oF tro PAGES

a

Pour radar contacts were made with an unidentified objeot sirborne over
England at altitudes of 1,000 or less to 30,000 and more, and giving returns
compurable with those of a B29 aircraft, between 0859 and 1026Z, 10 November 1950,
The object travelled at rates of speed warying from aporoximately 30 to 1,000
statute miles per hour, Its moverent was characterized by its apparent conabil ity

to make an exceptionally large number of abrupt changes of courre in uw relatively
short distance,

le Visual contact was not made with object. Returns on radar sercen
permit estimate that object could have been of the order of cite of the Be29 or
C=54e Object gave the sane returns on the PPI poope und J scope that would hove
been given by any single oircrufte The spead of the objcot varied from 30 up to
and well in exoess of 1,000 mepeh, statute, In one case the object climbed fron
13,000 to 30,000 feet in leer than five seconds giving a cliabing speed in exocss
Of 1,000 mepeh, while covering « lateral. distrnoe of 3,600 feet in the same p riod,
For the moct part the object travelled at a speed of about 60 map.ehe In maneuver
the object made turns very undulating both vertically and laterally at creat averd
within very short latera). and verticnl distances, In one case the object turned
90° to right from course for 600 ynrds of travel and then turned 160° to left for
200 yards, then 150° right for 300 yards (speods varying from 60 to 1 mepehe)
and then 110° abruptly Jeft, This meneuver continued for nbout 70 seoonds, In
another case the object made 18 abrupt turns of 100° or more in a lateral distance
of 2,500 yards, At one tine the altitwle of the object was so low (around 1,000
feet) thet it wae lost in the ground clutter, In each case when the object
disappeared its speed was so great or its altitude co low ao to be outside the
livit of capabilities of the automatic tracking circuits of the IPQ 2 radar plotting
equipment.

Ze First contact was made with the object at 08592 cand lasted until
090712 when it was lost in ground clutter, In this interval the ground distance
covered was about 6.5 wiles. After a 90 second break a second contact wis rade at
0909Z which lasted until 0912/2, The lateral dietsnce covered in this intervsl was
about 1.8 miles, A third contact was ande at 09462 lasting until 094,712 hen object
was lost due to acceleration and ascent in excess of capability of radar automatic
tracking equipment, A last brief encounter wes sede at 10254 lasting for a minutes
The object was then lost due to acceleration end ascent speeds exceeding redar
capability. No further contact was made,

3— Object was observed through surface radar contact by AN/MPQ-2 (SCR-534
reader set and MC-627 type plotting board) Redar Bomb Scoring Equip,-nte

de Observation was made from radar van at Heston Airdrome (51929!N ~
00°23'Ni), 2 miles NE of London Airport. Position of first and second contacts
5 miles NW of Bovingdom Airfield (51°43'lN = 00932") on heading of 45° T, Dropped
at a point 2 miles SE of Luton (51957'N = 00930'H) after travel of 3,5 milena,
(This includes break between first and second contacts.) In these contacts object
nas observed at 20,000 feet, descending to about 1,000 feet cnd ascending to an
unrecorded high altitudes The position of the third contact was at a point 6 miles
eouth of Luton on course of 360° T, turning clockwise after sbout 3 miles toa
heading of 40° T, Object was dropped at a point 3 miles SS of Luton after travel
of about 6525 milea,s In this contact object uscended from 1,000 f«rt to 13,000 feet
to 3,000 feet. The fourth contact was made in the vicinity of Eastlourne {500501 Ne
00°21 fz) on a heading of 225° T, turning to 270° T and then to 360°T, The object —
was dropped at an unknown point in the vicinity of Fastbourne efter travel of chout

HOTL; THIS DOCUMENT CONTAINS I . )
nu
iT DIRECTOR OF

IBN CLASS IZED. wenn nennene

al

AF FORM 112—PART I S estapivir a osore aN UNCLASSIFiew |

APPROVED 1 JUNC 1948 nee:
AIR INTELLIGENCE INFORMATION REPORT

"uty Chief of Staff, Intallie “"™
gence, Hq 3rd Air Division TRe1°50
—hPO-L257-US-kit Foree——— : gy

1e5 miles, In this contact altitude was 6,000 to 1,000 to 5,000 feet,

Sq These observitions were made by officers and airmen of Detachnent H,
3903rd RBS Squadron, with experience in the radar field as follows:

Captain, Sn: AO 728267, four years
lst Lt vate, ce, AQ 2012728, eight and one half years,

aircraft warning systens,

our and one helf years,

e Weather and wind conditionss 10/10 cloud cover, 1,000 feet, rain,
winds 2 9 65 knots at 20,000 feet, Gre 29250 inchea6.»

7, None known,

8, None, other than RBS plotting traces showing ground treck, altitude,
and ground speed of objeote

9p No aircraft rere scrambled by the U.SeAcFs and ReA.V. to attempt inter
ception due to weather and, in the cxse of the ReAcFe because of the absence of a
frequency channe] common to Heston RBS,

UNCLASSIFIED

OF

16—-85870- 1 W. . GOVERNH LAT PRiNTine orice

A]

DISTRIBUTION BY ORIGINATOR

SUMMARY; (Evter conclac summery of report, Cire sagnincunce in hunt ce scutes. ¢ ParayraMh, dat meteaured @ tower tet. begin tet! of report on AB orm 1/2 - Pet 11)

SLALTEMENT

UNCLASSIFIED

at approximately 0905 the undersigned observed the track of the first contact,

The altitude and low ground speed was considerad very umuvuel, Ininstructed the

redar operator and plotters to keep the pline under radur surveillance and

imeediately checked the equipment, Mxalfunction was not indicuted, Other aircraft
flying in the area were nicked up and tracked without difficulty, The first contact

ended when the aircraft descended: to an altitude 90 low as to “ke tracking
inposeible, <A sedond contact was established which lasted about three minutes,
The track was composed of very sharp turne which would be very unusual for
conventional aircrafte The third controt occurred at 0946 and continued for a
minute end a half, Break in cont.ot cocurred when virerr’t's soeed and rate of
climb increased so rapidly so as to cause operator to be unable to keep the
tracking cate on targets a fourth cont: ot of short duration south of the radar
pite was established st 1025¢ Loss of contact was caused by same reason os in

the third contact,
j
/s/
| Sree
Let Lt, USAF
—— Officer

_——— —-- _----_ --—o- _—_

UNCLASSIFIED

(Li Ye oP CATAUND 10—55500 1 VU. &. GOVERNMENT PRINTING OFFICE

Ati arctan 4

————_—_— . -* - “- : - . S++ « - - — —« -*

a Ave & Uk ‘aber eorelae an manary + Stopol, Gre agri ume La he eno aecite pragraph, Littalserae bower len, yin tater nto Ar tur “ 11d -d art Wy)

BLATEUENT
UNC!_ASSIFIED

At approximately 0915, I was called to the plotting van to observe the tracking
end plotting of an aircraft flying in an unusus] mannerg At the time of my arrivol,
radar contoct with the airor: ft was lost. I exemined the two trucks on the nlotting
board and questioned the plotting perronnel regarding airersft's manner of flights
Realizing that it was en unusual oocurrance I instructed them to probe the area
again in effort to re-establish contacts At 0946 contect was agein mado and a
legible plotting track obtained for approximtely 1} minutes at which time contact
with the aircraft was lost due to it's high rate of acoelleretion and speed, Contact
was again re-estebliched to the south at 1025 and ea legible treok lasting 40 seconds
was obtaineds The aircraft wee agein mking undulsting turns and eudden altitude
changes, Contact was again lost due to it's high rate of sccelleration and climb,

A further search lasting spproxinately 1 hour failed to re-establish cont:.cte
Observation of the tracking and plotting equipment revealed it to be in first cless
operating condition, Other aircraft were tracked in the local area with excellent
results, All data obtained is included in basio report and photostatios copies of
pPotting traces,

,

DISTRIBUTION BY ORIGINATOR

16—55.50 4 U. 5. GOVERNMENT Pant © C OFFICE

eee ee |

ST Veta '-

on OF

——— ttl

———_ ee : ~~. let a . *“* —— ee ee. eee - -_ a ee a

SUMMARY: (Anire cones eummary of report. Cine Hypuite ance in nnal one-rentente par agray' Liat incduaures at bouer left. leeyin frat of report om AF Purw ne. «Pert 11)

I wio on duty st 0800 hours, Friday, 10 Niovether 1950. hen ow vower unit hud
warned up gafficiently, I turned o: the redaur ind plotting equinient, at uiout 0202,
as I‘noraally do, I let the equipment war up and then about 0845 rrocesded to tune
Up the mder ret ene ardpn the ,Lotila, boards sALout 0855 T wae seewohing the wren,
soann'ng first et round leva] to obeervs prouki revorns, an? then nutting it in
PPT hedie:nl rean to see if 1 could locete any sirer.ft to cheek the »atomtic trackLag
operation vith, It was then th t we pdoke? ap the return fror the airersft ta
Guectioie 0, | (The coder operstor on duty) ws with «» in the SCR 534 et the
tine, atv’ he cet the controls ami svitehed to sutowntic trackings at first cont-ct
it wee ubout 37,000 yarcs slant rane from bie redar sete During the nxt helf o
minute or so, we noticed thet it was travelling vary clowly alipough fro. the ele~
velion angle it seened to be about 20,000 Lert upe at tits codat I decit~' to see
whst its track would look likes I csiled to C.] Qi who was in tis clotting
vetiy ond esked him to are the «ltisude, end the prownd track, then 1 went into tie
plotting van,‘ und Cr] ay «9° [ . at in the oroner perellex to bring the obj-ot
on the board, (30,090 yards ! & 10.0% yeris w oercllax), It's sltitude at tht
bine won 15,500 feet, Op) QAR coutiaud to trnck it and we wteliej the jen
arowing on unuswely irregaler trick on the boerc¢, Knowing tie radar and plottlag
maipient to be in good working order, en’? th: t the oeevlier trac. wis not belug
ecused by any equipment fuilwe, we crcled on ow Loitar: e to tle office.for Lt

te come up, He tien cane uy» tovether with 3, ali, chief rlotter on
tie shifte During tiis t'me the Airoraft's progrese aade it necessery to chanys the
board "rellax to 50,000 yards Ny and 0 kart or West, The »ireraft, having been
ceecendiiag firly constantly, finally dropped close «novgh to jroun.s level to p«core
lost ia bhe crovmi clutter, jie thea cenrohed cpeing un found it very shortly after
road trecked it as ways fort ere Jurt then it suddenly ectartrd to ccceler.te very
quickly und disappeared fron the scorn. After seurching for 2 short uhile, the
nodulnator ext out, aad ofter ea short check I discovered one of the molulator tubes
wee dnoperutives After changing the tube, the set one operntiny properly apaing o0
‘we beyan cearchiag, und «tb 0946 amie another contect. Yor this treck the N peral).sx
hed to be decreased to 40,0 jyurds, after a minute and 6 helf, the airervt ageja
Cisa:perred frou the scose with » burst of speei, ie coutinue? searching, end belig
un ble to find enyto'ng In thet seetor, started searching 1 (ull 360 darreese «st
various intervels we nicked up cirersft which were orooeeding in 1 normal manner,
anc thep at 1025 nde contoct with the same or a sindiler airor:.ft in the South, Once
Ogedn Ab wos lost after « very short time as we were un ble to cheunge the range
tracking rate quickly enough to keep up wit] it. No fw'ther contscbs were mde

during the balances of the dase / /
SER.
/t/

S-¢ USAs'’
Racur Technician

DISTRIBUTION BY ORIGINATOR

UNCLASSIFIED

(CLASSFICATION) | 1o—enee-1

©. 5. COV @eweer Peiatiase errica

LE LLL 7
y ARY: (Bh oncl a r report, @i Ipcance in final one-sentence paragraph, List inclosures af lower left, Legin tért of report on AF Porm 112#-—-T'ert 11.)

vacassimizest |
I, Set rarer being called into the plott-r by Corpo a to
observe irresular trrek on the Wh, : t m5; roxdactely C905, offer the folieriag

Lforant Shortly after Cant: Lagi, Licdrenant ¢ wml myvelf arrived,
Sergernt™ Fwitched on to .utomtiec aceaia, oni celled thet he hed the sane
pArerift dn the conve apalig This tine iis track wee more irreguler, and he seemed
to be uceelercting, and olinbing at unurunl cpeeds, unt) with a burst of seed he
Cisanpeared upaltg Serze.nt ete 0 ae hed nicked up an aircraft ina
different seotor to tert t wionent.: This airerast appeared on thse board in a
nornal way, abi Sergeant ae dronped it anc went back to look for the first

on* againg We again nicked up the first sirereft and ve contiaued to truck it until
it made « sudden burst of apeed in a clinbing notion ond the redar was unable to

hold it in contact.

STRIBUTION BY ORIGINATOR

UNC! Ac -

: THIS DOCUMENT CONTAINS INFORMATION AFFECTING THE NATIONAL DEFENSE OF THE UNITED STATES WITHIN THE MEANING OF THE ESPIONAGE ACT. 90 U.S.C -
31 AND 32, AS AMENDED, ITS TRANSMISSION OR THE REVELATION OF ITS CONTENTS IN ANY MANNER TO AN UNAUTHORIZED PERSON IS PROHIBITED BY LAW
IT MAY NOT BE REPRODUCED IN WHOLE OR IN PART, BY OTHER THAN UNITED STATES AIR FORCE AGENCIES, EXCEPT BY PERMISSION OF THE DIRECTOR OF

INTELLIGENCE, USAF.

atehertaaa.: 2
oe pu lid 1¢-—reeme ji 0. 8. COV@eaeul Paistine orrees

NCLASSIF'FD

Basic ltr fr Hq Third Air Div to CG AMC, undated, subj: "Rept of Uncon-
‘ventional Airborne Object" (Confidential)

————— ist Ind MOIAXA-1a/JIR/eps
hl Vil ame HQ AMC, Wright-Patterson Air Force Base, Dayton, Ohio AAS J

; THRU: Director of Intelligence, Hq USAF, ATM: APOTN-C/6C, Washington
y De Cc.

TO: Commanding General, Third Air Division, ATTN: DI, APO 125,
c/o Postmaster, New York, 8. Y,

' J. The information containod in IR-1-50, United Kingyiom, entitled
“Unconventional Airborne Object" has been carefully analyzed. It is the

fERSONNEL & ADM. | COnBSidered opinion of the Intelligence Department, AMC, that the described
unidentified radar targets which were detected on 10 Noverber 1950 by the
SCR-584 radar, located at Heston Airdrome, were due to abnormal weather
conditions.

2, Unidentified radar targets comparable to those reported in In-l-

wEAncH a bev | 50 were detected by an SCR-534 located at Wright-Patterson Air Force Base

on 6 March 1950. Interceptor aircraft could not locate airborne targets

but reported ice-laden clouwis in target vicinity. It was concluded that

the ice-lacen cloucs vere responsible for these unidentified targets. A

similar explanation is considered applicable for the unidentified tergets

detected by the SCR-5S4 located at the Heston Airdrome. Rapid changes

of target altitude, direction, and speed could be attributed to a repid
= changing condition of the local atmosphere.

i
4
Waebrevevs | Ueeebis
TY "TY

GP Ie

“| 1 Inel HAROLD E. WATSON
n/e : Colonel, USAF
Chief, Intelligence Department

Noe DOWNGRADED AT 8 YEAR INTERVAIS:
| DECLASSIFIED AFTER 12 YEARS.
- DOD DIR 5200.10

Priemiei.- s *,
| SARER COMMANDS aan sw ne CN L wot ORIG. FILE COPIES TO INITIALS [| EXTRA | OFF. SYMBOL | INITIAIS
APPLICABLE WHEN ADDITIONAL RECORDS SED. AOD | cory
SPACE I$ NEEDED IN COORDINA- |—
TION BLOCK BR. LAB. BR. | RETAINED
AMC Form No. 6
fn 1 Apr ‘a),

CENTRAL FILES COPY

rr

STATEMENT
UNCLASSIFIED

I, 0.7. icetne? wes on Cuty et COOO heures Friday the 10th of ‘lovember
L3H, with Serrevat e he were checkiag the balance o% the ruler get by

se.noing: the aree in Pol conan when we cickei wp a returng I locked it in automstic
on? trrekxt it, we thoucht it aust have been « lisizon cirere’t or mulivel nt
becuure of the rlow cpeede We cicoked the altitude and fone it to be sround 19,000
fret, Ve decided to stay on it and get a track on the plottiig paver to check it's
nir epee? as we hed no abrer: st on the rane at th.t tlsee ie trroxed it on the
nlottine board aud figured the ground epoed fron ite I tracked ft in rutom.tic und
the oheage of specd was noticeable while traekiag ite It seened to slrost cone

to ne dend stop and-then speed up ayeine Trios J lost it dug to tis irreular

te: shing, while trying to pick up this adireraft azxin I looked on nunerous oth 3
ntreraft and the set checked ort Oke After I lost it the leat tine we kept
searching the nrea but couldn't rick it up ayaine

eee
Mm Chol, USAF
))) Yy
ea

BUTION BY ORIGINATOR

: THIS DOCUMENT CONTAINS INFORMATION AFFECTING THE NATIONAL DEFENSE OF THE UNITED STATES WITHIN THE MEANING OF THE ESPIONAGE ACT, 80 U. S.C.—
31 AND 32, AS AMENDED. ITS TRANSMISSION OR THE REVELATION OF ITS CONTENTS IN ANY MANNER TO AN UNAUTHORIZED PERSON IS PROHIBITED BY LAW.
IT MAY NOT BE REPRODUCED IN WHOLE OR IN PART, BY OTHER THAN UNITED STATES AIR FORCE AGENCIES, EXCEPT BY PERMISSION OF THE DIRECTOR OF
INTELLIGENCE, USAF.

10S -h ©. 8. Covm@esent parwriae orien

UNCLASSIFIED |

be “TE LALEMENT
UNCO en

I, Cpl a, while standing by the radios on the morning of the
Oth of November, at about C&55, I raceived call on the Interphone fro. Serceant
‘alrick asking ne to cheok the altitude and ground speed of an aircraft he was
rocking. I switched on the plottiug board and checked the altimeter, The vircraft
ms flying at 19,500 feet, nnd seensd to be almost ctanding still, aA check of the
rack revealed hia to be making between 50 and 60 FH ground speed, and a further
sheck of the altineter indicated thit he was dase«nding very slowly, until he got
fown to ground levele The truck seemec very irreculcr, and not understanding it,
Called Lieutenant tke “lectronics Officer, und Sergeant the chief
lotter on my shift. & short time loter, after Capt:ia nd Lieutensnt
and Sergesnt@@jehud errived, Sergeant Qi switched on to Av.onatic
aseda, ane oslled that he hed the same aircraft in the scop* againg This tine his
rack wau more irregular, and he seed to be accelerating, and climbing st unusual
speeds, until with a burst of speed he disarmeared apaing Sergeant Qa agein
indicated that he hed wicked up an circruft in a different sector to test the
quinment, This aircraft appeared on the board in e normal way, and Sergeant ee
irocnes it and went back to look for the first ons araing He again picked up thr
irst sircraft and we continued to trick it, until it made a sudden burst of speed
in a climbing motion and the radar was uneble to hold it in contute

eS
Col, JSAF

Se ee oe

.-— INCLS.

RIBUTION BY ORIGINATOR

THIS DOCUMENT CONTAINS INFORMATION AFFECTING THE NATIONAL DEFENSE OF THE UNITED STATES WITHIN THE MEANING OF THE ESPIONAGE ACT, 50 U.S C.—~
31 AND 32, AS AMENDED, ITS TRANSMISSION OR THL REVELATION OF ITS CONTENTS IN ANY MANNER TO AN UNAUTHORIZED PERSON IS PROHIBITED BY LAW.
IT MAY NOT BC REPRODUCED IN WHOLE OR IN PART, BY OTHER THAN UNITED STATES AIR FORCE AGENCIES, EXCEPT BY PERMISSION OF THE DIRECTOR OF

wee INTELLIGENCE, USAF.
az
1@—55600 1 U. &. GOVERNMENT PRINTING OFFICE

UNCLASSIFIED |

okt ONLY ©, K (0
PHo-To GRAPHS OF MAES of
CHARTS OR GRAPHS
OF CoukcsSE oF U Fo
SIGUA TED | AT
Puisere | ENGLAND

[Oo Wo 1999

oe

. >,
. i & a Gee
{
‘ .

agar big geeretioans eee
ee UNCLASSIFIED ose
Summary of Recent Aerial Phenomena Reports from 17th OSI District .

11 Nov. 1950 - Reports of a large-sized balloon, It was determined

that this was released by General Mills. The balloon

subsequently was recovered.

-—— ——= ® ’

UNCLASSIFIED Na de/Ssh'ene

4 .90U

SUBJECT: (QEREEMEERED) Reported Information on Unusual Rader Sightings

THRU: Director of Intelligence

ATIN: Technical Capabilities Branch
Headquarters, USAF

Washington 25, D. C.

‘ 170% Commanding General
RESEARCH & DEV." Third Air Division
South Ruislip, England

1. Reference is made to confidential message, 3AD-DI €3998/11-10-50,
subject: "Report in accordance with Par 2d, letter Hq USAF, subject:
inneiiioence —— Reporting of Information on Unconventional Aircraft dated 8 September 1950".

2. The radar sightings reported in the referenced message are be-
lieved to be spurious radar echoes caused by atmospheric conditions. The
shape or signal characteristics of spurious radar echoes are of consi-
derable assistance in analyzing the sightings. The signal returning from
a target would occupy, in range, a space on the sc equal to the radar
pulse length in seconds multiplied by the speea of electrical impulses
through air. Thus, a pulse of one microsecond length multiplied by
186,000 (the speed in miles per second of electromagnetic waves through
air) would "paint" a target on the scope which would occupy 0.186 miles
range. Spurious signals due to weather conditions always occupy more
range than that from a single target and have e more repid beating and/or
change of signal strength than that obtained from aircraft targets. At-
mospheric conditions causing spurious micro-wave radar echoes usually
consist of rein, heavy water-laden clouds and ice-laden clouds. Abnormal
temperature changes with altitude are usually associated with these at-
mospheric conditions and may be responsible to some extent for the spurious
echoes. Th@ SCR-504, like all radar equipment operating at a frequency
of about 3,000 megacycles per second, is susceptible to such spurious

LASSFIED €=IErs
~ "AREA COMMANDS Witt LINE OUT ORIG. FILE CoPiEs To s EXTRA OFF. SYMBOL INITIALS

ORGANIZATIONAL TITLE NOT

APPLICABLE WHEN = ADDITIONAL RECORDS SEC. AOD cory

SPACE IS NEEDED IN COORDINA-

TION BLOCK HQ. BR. LAB. BR. RETAINED

AMC Form Ne. 8
Rev | Apr 48) C) C)
o v wor) | WF-i-i5 Apa a9 9 ee Test thier PARY ——— —————

a a ae

| coum UNCLASSIFIED
AMC ltr ata 11/2://50, to CG, Third Army Div, 80. Ruislip, Eng, Subj:
(Conf) Reported Information om Unusual Rader Sightings :

echoes. The unusual speed and rate of climb reported can be accounted
in| for by the fact that the spurious echoes will disappear at one place and
Vii iil appear at another with relatively minor local changes in the atmospheric
WM condition of those places. Thus, the apparent movement of the scope image
; from one place to another at unusual speed indicates the disappearance
and appearance of echoes due to local changing atmospheric conditions
rather than the actual movement of a radar target,

3. The echoes described in the referenced message are considered to
be very similar to those obtained on the scope of an SCR-504 at Wright-
Patterson Air Force Base on 8 March 1950. Fighter aircraft were vectored
tovards the spurious echoes at Wright-Patterson Air Force Base, but no
fERSONNEL 2 ADM. | targets were seen by the fighter pilots. However, the pilots reported
the formation of ice-laden clouds at 10,000 feet altitude. The ice con-
ditions of these clouds were considered to be responsible for the
spurious echoes and the changing ice conditions of the clouds to have
caused the signal strength to fluctuate and to appear to be moving at
various speeds.

RESEARCH & DEV.
4, Another similar report vas received concerning the area at Oak

Ridge, Tennessee. In this report, the type of radar set used and the
current meteorological conditions were unspecified. Fighter aircraft
were thoroughly vectored over the area toward the various echoes and the
plotting pereonnel reported several perfect interceptions. However, the

pilots reported nothing sighted on both daytime and nighttime intercep-
tions.

5S. The Air Materiel Command will be interested in receiving the
report which was stated to be in preparation. ‘The most interesting part
of the report would be photographs of the scope patterns obtained. If
photorraphs were not made of scope pattern for the sightings reported in
the referenced message, a special effort should be made to obtain such
SUPPLY AND MAINT. | Hotographs in the the event of any future sightings.

FOR THE COMMANDING GENERAL:

cc: CG, SAC HAROLD E. WATSON
CSAF Colonel, USAF
Chief, Intelligence Department

: NCLASSIFIED
attention
*AREA COMMANDS WILL LINE our ORIG. FILE COPIES TO INITIALS EXTRA Orr. SYMBOL INITIALS
ORGANIZATIONAL TITLE NOT
APPLICABLE WHEN ADDITIONAL RECORDS SEC. AGD cory
SPACE 1§ NEEDED IN COORDINA- =
TION BLOCK HQ. BR. vo RETAINED
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C¢ THIRD AIR DIVISION SOUTH RUISLIP ENG

© CG AMC WRIGHT PATTERSON AFB DAYTON AFB onto (ATM CTS]
NFO CHIEF OF STAFF USAF WASH DC) | WNC) Ace inn

CG SAC OFFUTT AFB OMAHA NEBR " “t,
AF GRNC
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MYASAD-DI C3996 SUBJECT IS REPORT IN

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CCORDANCE WITH PAR 2, LTR.HO USAF,.SUBJ$ REPTG.OF INFO ON 2 9 2...
NCONVENTIONAL ACFT, DTD 8 SEP 5% REPORT FOLLOWS PARAGRAPH NBRS CITED
N PAR ABOVEs %« ESTIMATED APPROX SIZE Be29 TYPE ACFTs ETIMATED SPEED
30-2000 MPHe RATE OF CLIMB ESTIMATED 1759 FT PER oi 2. 99052, 10
Boy 50. ADDITIONAL OSNS AT 99122) 19122, AND @946z DURATION OF OBSNS
g3 MINUTESs 3e ELECTRONIC. SURFACE&s SCR 584e PLOTTED ON MC627
PLOTTING BOARD, EXPANDED’ CALE* 44°HESTON RBS SITE, HESTON AERODROME
ESTONy MIDDLESEX, ENGLAND» 51 29N-9023 We GROUND LEVEL TO 20,000
Te DISTANCE 40*6%,000 ‘YARDS NORTH) SLAND RANGE. 5+ EQUIPTMENT
DPERATED BY QUALIFIED PERSONNEL WITH 25 YEARS EXPERIENCEs ALL
PERSONNEL CONSIDERED RELIABLEs- EQUVPTMENT FUNCTIONING PROPERLH. 6. 19/10
COVER 40,020}« FEET, RAIN, WINDS 250 DEGS =65 KNOTS AT 20,000 FEET. |
IPFE“29.50 INSe 7. NONE Be PLOTTING RECORD FROM MC&-627 PLOTTING BOARD
INDECTING GROUND TRACK WITH TIME BASES -9. RAF -FIGHTER COMMAND
EDIPATCHED FIGHTER ACFT TO AREs NO REPORTS RECEIVEDs’ REFERENCE PAR
Ey CITED LTR, REPORT BEING PREPAREDs PHOTOGRAPHS OF HMLOTTING

RECORD WILL ACCOMPANY REPORTs CGTADe

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