PROJECT BLUE BOOK

11
1. DATE· 7IME GROUP 2. LOCATION
41
.13 Feb 53 13/08352 CarswellAF3, Texas
3. SOURCE 1. CONCLUSION
Civilian Man VISUAL - WAS AIRCRAFT. RADAR - GROUND TARGEPS.
NUMBER OF OBJECTS Evaluation: Possible ground clutter & F-86. Tempeture inversioh
excistent. Radar analyst stated that it has highly probably thet
Three blips s were ground t targets.. VISUAL: It is believed that lithts
5. LENGTH OF OBSERV 11. BRIEP were from an a/c.
10-15 Min. Three bright lights were o served hovering in various formas
6. TYPE OF OBSERVATION tions during a period of 10-15 minutes. Objects were also
Ground-Visual picked up by 'radar on 3-36 a/c, 2 minutes elapse between
Ground-Radar visual I sighting and radar sighting.
7. COURSE
. PHOTOS
Y.s Yes
No
9. PHYSI VIDENCE ENCE
0 o Yes )
No
FORM FORM
FTD SEP63 0-329 (TDE) FTD SEP 63 0-329 (TDE) thie form mey bo usod. /
.
8 ,
.

ANTENNA POSITION OF RADAR

ATIC has received Electronics Data Sheet submitted by your Base. Additional ques- .
tions which arise follow: 1 Were the 2 radar blips moving? 2)Did they change size
then reap a ney location? 5Were they sharp to known air-
e Book.
COORDINATION: DECLASSIFIED TCIAL FILE COPY
DOD DIR ATIAE-5
Office of Record
Lt Disson Project 10073
ATIAE DATE
Jinston
ATIA dDATE
UNCLASSIFIED
PAGE I on I PAGES
ORAFTNA chen required) RELEASTNG OFFICER'S SIGNATURE
Lt R. M. Clsson/jos hnaDenewt e
31 ATLAB-5 TET - 65365 Major, USAP
Adjutant
REPLACES NME FORM 173, 1 MAY 0q 16--58923-3 * U. IENT OFPICE
DD O  173 WHICH MAY BE USED.

COORDINATION
ORGNL CODE AND INSERT
FULL SIGNATURE UNCLAS
In reply refer to R.M.OLSSON/jos/65365
FOIN-ATIAE-5
9 JUN 1953
SUBJECTI (Unel)
Tos Coumanding Officer
19th Air Division
Carswell Air Force Base
Fort Worth, Texas
3
Your station's unidentiffed object report involving radar
detection for the above date has been received by the Air Technical
Ihtelligeo Centar and reviewed by its electronics personjel.
a 2. It was 2. It found found that insufficient radar data ecisted for an insufficient radar data existed.for an
ekplanation of this sighting and, therefore, ArIc is forwanding therefore,ATIc is forwanding
the inclosed Eectronics Data Sheet. This Center realizes that the
sabject subject sighting sighting took place four four months agoj ago) however, if ths radar
personnel involved can remember the facts of the facts of the re-
qilests qiesta fill C11 out this forme
14
3. With the information 3.. With the information provided provided by this forma the Air Techni- fora the Air Techni-
Al Intelligence Center 41 Intelligence Center feels that a logical explanation can be
made fer the incidant. made fer the incident.
FOR THE COMMANDING DO GENERAL
t
1 Inel BARBARA P. HANAWALT
Elec Data Shest
Ist. Lt., USAF
Asst. Adjutant
ATIAE-5
Lt Olsson Date Ju02
ATIAE
Lt Col Johnston DATE 5Sune53 DOWNGRADED AT 3 YEAR INTERVALS;
DECLASSIFIED AFTER:1X YEARS.
DOD DIR 5200:19
ATIA
Col McDuffee
ATIG
Lt Hanawalt DATE
DE RSCARDI
UNCLASSIFIED
11
OFFICIAL FILE COPY
A.MC Form 8 (Rev 17 May 50) Supersedes AMC Form 8, Rov 1 Apr 48, which will be used. Air Force-WPAFB-L-23 JUL 52 3600M

When not filled in, the form is Unclassified. The reporting owE
judgement as to wha
It is preferred that the answers to the questions be typewritter
pedite the completion litional space
is needed, use reverse of form.
1. STATION OBSERVING TARGET: 2. DATE OF THIS REPORT:
CONVAIR ACET PLANT 29 June 1953
Organization Day Month Year
FORT WORTH, TEXAS
Location
3. DATE TARGET OBSERVED: 4. NAME, RANK K AND ORGANIZATION OF
Local Time REPORTING OFFICER:
13 $FE{B 53 THOMAS SMITH CAPT
Z Time
Day Month Yoar Ho So Tth BonB WG
Time-Local 0235 CST Time-20835 CARSWeLL AFB TEXAS
5. COORDINATES):
OBSERVER DATE (LIST EACH OBSERVER): No. of Years
Name Rank Dury Exp, in Radar
0
occasionally shifting poaition so that they appeared to swing like a pendulun on the I
center They gained ahtitude as they noved anl suddenly aopeared to agcelaratel
at a speed away from the ooservers and disapreared. The outer lights wirel
graenish-c ast in color and the center light was : white. No sound was heard. The weather
DOWNGRADY 12
AT'3 YEAR INTERVALS;
DECLASSIFIED AFTER 12 YEARS.
DOD DIR 5200.10

Aotion ATIC
1953 JUL 22 08:41 Atia
JEDMH A12
JWFQB 120 UNCLASSIFIED 4R.File
RR JEDWP
DE JWFQB 09C GEF SEE CHYPTO-CENTER
FM COMDRADIV 19 CARSWELL AFB TEX
TO COMDR ATIC WRIGHT PATTERSON AFB DAYTON OHIO
7DI 1416. PROJ BLUE BOOK, REF URMSG
7-16- REQD INFO IS FOL.. BLIPS WERE AT EXTREME RANGE
OF RADAR AND OPR COULD NOT TELL WHETHER RANGE BUT THEY
DID NOT MOVE IN AZIMUTH BLIPS OID CHANG BLIPS
DISAPPEARED DISAPPEARED INTO INTO NOISE NOISE AND DID NOT AND DID NOT REAPPEAR. RADAR REAPPEAR. RADAR OBS THEN OBS THEN
ATTEMPTED TO PICK ATTEMPTED TO PICK THEM THEM UP ON TAIL RADAR OF ANOTHER UP ON TAIL RADAR OF ANOTHER B-36 ACFT
UNSUCCESSFULLY. RETRNS UNSUCCESSFULLY RETRNS OF. OF NEAREST BLIP WERE VERY SHARP COMPARED COMPARED TO B-36
TGT. OTHER BLIP WAS BLIP WAS JUST ABOVE ABOVE THE NOISE LEVEL LEVEL OF OF RADAR.
JUL JWFQB
DECLASSIFIED AFTER 12 YEARS.
DOD DIR 5200.10
FIED IED
UNCLAS
SH72-
10 T33-8472-
.
I

UNCLAS
9. HAVE YOU HEARD OF ANYONE NOT AT THE RADAR STATION MAKING A VISUAL SIGHTING AT APPROXIMATELY
THE SAME TIME THE RADAR CONTACT WAS MADE? YES NO
IF SO, GIVE NAME AND ADDRESS.
9. RADAR SCOPE PHOTOS:
IS RADAR EQUIPPED WITH A SCOPE CAMERA? 0 YES 8NO
WAS CAMERA OPERATIONAL?.-- 0 YES NO
WERE SCOPE PHOTOS TAKEN?-. 0 YES NO
WERE PRINTS OF THE SCOPE PHOTOS ED TO THE
AIR TECHNICAL INTELLIGENCE CENT -YES NO
10. 10. TRACk DAta: TRACK DATA:
WHAT WAS THE NUMBER OF THE TRACK?
YES YES NO NO
11. WERE AIRCRAFT SCRAMBLED TO INTERCEPT THE TARGET? YES NO YES NO
IF SO, WERE THE AIRCRAFT BEING OBSERVED ON THE SCOPE AT THE SAME
TIME AS THE TARGET? YES NO
12. WERE ANY NEARBY RADAR INSTALLATIONS QUERIED WHETHER THEY H OBSERVED YES
THE SAME TARGET OR TRACK? NO
IF SO, WhiCH StatioNS? CArsYElL ARE IF SO, WhiCH StatioNS? CArsYElL AFE Oli. This radar mas n Coi. This radar mas
tine of sighting.
13. WAS THE TARGET OBSERVED CN SEARCH RADAR? 13. WAS THE TARGET OBSERVED CN SEARCH RADAR? YES NO
IF SO, WHAT IS THE NOMENCLATURE OF THE EQUIPMENT? LESO - ire APG-4lA Gunlaving Radar APG-4lA Gunlaying Radar
(Tail-mounted on B-36_acft)
14. WAS THE TARGET OBSERVED ON HEIGHT FINDING RADAR? YESNO
THE EQUIPMENT?
A
15. HAVE THERE BEEN ANY YES NO
IF SO, DESCRIBE.
16. MODULATOR (I.E., SPARK GAP, HARD TUBE, ETC.) IS USED IN THE RADAR EQUIPMENT?
Hard Tube
NTROL) CIRCUIT YES NO
COMMENTS:
13. HAS INTERFERENCE ANO RADAR SET BEEN OBSERVED RECENTLY: YES NO
COMMEN TS:
ATIC FORM 332 NOV 1952) 13 DECLASSIFIED AFTE? 12 YEARS.
DOD DIR 5200.10
UNCLAS SSIFIED

UNCLASSIFIED
19. ARE PERSONNEL FAMILIA INTERFERING SIGNAL? YES NO
COMMENTS:
ARE PERSONNEL FAMILIAR WITH THE EFFECTS OF ANOMALOUS PROPAGATION (DUCTING EF FECTS) AS T THEY
PERTAIN TO THIS TYPE OF RADAR? YES NO
21. HAS ANOMALOUS PROPAGATION (DUCTING EFFECT) BEEN OBSERVED RANGE
GROUND CLUTTER OF THIS RADAR SITE? YES NO
COMMENTS:
22. WAS ANOMALOUS PROP AGATION (DUCTING EFFECT) EXTENDING THE RANGE OF THE GROUND CLUTTER AT
THE TIME THE TARGET OBSERVED? YES NO
COMMENTS:
.
23. HOW DID THE TARGET APPEAR IN SIZE AND SHAPE AS COMP ARED TO NAL AIRCRAFT TARGETS?
About thrse times the size of a E-36.
1C.
24. PERFORMANCE OF TARGET:
a. REMAINED CONSISTENT IN SIZE CHANGED SIZE RAPIDLY 0
b. SPEED WAS CONSTANT b0 SPEED WAS VARIABLE
c. APPEARED, DISAPPEARED, THEN
REAPPEARED IN NEW LOCATION 0
d. FUZZY COMPARE TO AIRCRAFT SHARP COMPARED TO KNOWN .
TARGET AIRCRAFT TARGET 0
. SAME AS AIRCRAFT TARGET .
25. WERE OTHER TARGETS (KNOWN) OBSER IN THE SAME GENEI THE SAME
TIME AND AT THE SAME AL TITUDE AS THE UNUSUAL TARGET? YES
IF SO, DESCRIBE.
27. SCAN RATE? ?_l cycle in 3 saconds.
WAS THE FREQUENCY OF TRANSMITTER?
9245-1es
29. DID ANY OF THE OBSERVERS HAVE ANY OPINIONS AS TO ARGET? YES QNO
IF YES, GIVE THEIR NAMES AND OPINIONS BELOW.
DOWNGRADED AT 3 YEAR INTERVAUS.
DECLASSIFIED AFTER 12 YEARS.
DGD DIR 5200 10
ATIC FOr NOV 1952
UNCLASSIFIED

UNCLASSIFIED
30. IF SCOPE PHOTOS ARE NOT AVAILABLE, PLOT THE TARGET TRACK AS ACCURATELY AS POSSIBLE. GIVE
THE TIME AND ALTITUDE (IF MEASURED) FOR EACH POINT PLOTTED. PUT THE NECESSARY RANGE SCALE
ON THE DIAGRAM.
/
_…* —
DOWNGRADED AT S YEAR INTER"
DECLASSIFIED AFTER 12 YEARS.
DOD DIR 5200.10
ATIC FORM 332 (REVISED 25 NOV 1952) 15
UINCLASSIFIED --

1
UNCLASSIFIED
1.Visual observation was made
observation on the APG-4la. And visual observation was being made at the sane
time as the radar observations. Azimuth of target was the same in bbth cases,
and oosorvers are certain that the visual target and radar target were the
same object.
.
,
DOWNGRADED AT 3 YEAR INTEE:
DSCLASSIFIED AFTER 15 YEANS
DOD DIR 5200.10
UNCLASSIFIED
ATIC 7ORM 332 (REVISED
MMICLACCIEIED

1 1080
-
M
- E.
e 2t LO 9
C PS
P .
-1
Ii
A
El

Multipo
SUBJECT: Carswe B Radar Sites
SEc0/1
TO: ATIAE-5 FROM: ATIAE Aug 53 COMMENT/NO.
THRU: ATIAE
65364/B1d8 2
1. Reference is made to the additional information me
1 of Comment No.l. This information is quoted below:
"Blips 3 vere at extreme range of radar and operator could not tell
whether moved in range, but they did not move in azimuth. Blips did not
change size. Blips disappeared into noise and did not reappear. Radar observers
then attempted to pick them up on tail radar of another B-36 aircraft unsuccess-
fully. Returns of nearest blip were very sharp B-36 target. Other
blip was just above noise level of the radar.
2. The characteristics of the above signals are compatible with those of
ground return. The inclosed weather information indicates that there was a
temperature inversion at loo0 Mb pressure (near the earth) and at 890 Mb pressure.
Also a rapid Also a rapid moisture moisture lapsf began at 890 Mb pressure. lapstbegan at 890 Mb pressure.
3. It is considered 3. It is considered that That radar adar
targets s were ground s were ground targets. targets.
4. This may be downgraded to CONFIDENTIAL downgraded to CONFIDENTIAL upon removal of
inclosure, in accorda accorde paragraph 25e, Air Force Regulation 205-l. 25e, Air Force Reg egulation 205-1.
l Incl 1 Incl James
=/c Radiation Section
DOWNGRADED AT 3 YEAR INTERVALS;
2 DECLASSIFIED AFTER 12 YEARS.
DOD DIR 5200.10
UNCLASSIFIED
-

2

3 SAA an PC T/E 17
2H 1o0 99 AU 1R
1AS F EEOEN
40 X
3 LER
- 3 6 LC 24 and 53 1A0 LS 2 20
F 1 N IX 44191 17
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ea Te EA D 571 4
Hu

& 22 3 e5 12 SA II
Te ay cdy 32
33 Te A VX ? Va K 5D a 17 3 2
POEOKCAHRLSS 3 a 1
19 ec MEC 40 KOKEMR GI6OR: 3C5 CROPA FETES a
CH52 2 N +
- E 24 32 12
1834 DA t ME1 1 tai and o2 NOS 180 RIL 2
52 TLEIET PS 11 LSt a 25 E18 92 - UN
24 m CN 5: c S x 1
A 7 4 a -1 155AR SPT w PL C 0 a 31 TE
By
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R 2 C L

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7 i5 1RES 3 22 25 0
92 2 1R6
TE S 12 Z wd2
1X
J8 20 F read
2 4
7
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1 1/
This cae inude to2 1615
phatrspid charts.

SECURITY CLA CATION (IfRy)
7
DISPOSITION FORM
UNCLASSIFIED
.
FILE NO. SUBJECT
Carswell AFB Radar Sites
TO ATIAE-2 FROM ATIAE-5 DATE 27 Jul 53 COMMENT NO. 1
Lt Olsson/vs
65365/B263A/P A-12
1. Inclosed is a radar sighting on 13 Feb 53 from Carswell AFB, Texas, concern-
ing radar blips picked up by B-36 tail radar. In a preliminary analysis of this
report, your office stated that the radar information supplied was insufficient for
you to analyze For example, there was no indication that the 1 targets observed on
the APG-41 were moving targets. Project Blue Book has requested and received the
additional information needed and incloses it herewith.
2. According to this information the targets in question were moving and also
a certain amount of ground clutter or "noise" was present. Project Blue Book requests
your office determine, in the light of the additional information you had requested,
whether temperature inversion was present or any other phenomena known to you could
have caused this sighting. have caused this sighting.
Map b. Jutch,An MapS. Jutch,Ar
1 Incl 1 Incl ROBERT M. OLSSON, lst Lt, USAF
File e dtd dtd 13 Feb 53 Chief, Aerial Phenomena Section
Carswell AFB, Texas Electronics Branch Electronics Branch
Technical Analysis Division
If inclosure. If inclosure. Is withdrawn (or
not attached), the classisication ofis cor- not attached), the classisication of, tais.cor-
respondence will be downgraded to...in HAS in
accordance with paragraph 25E, AFR205-1.
3
DOWNGRADED AT 3 YEAR INTEFVALS
DECLASSIFIED AFTER 12 YEARS.
DOD DIR 5200.10
UNCLASSIFIED
DD 16-013 U. S. GOVERNMENT PRINTING OFFICE:1952 Q - 9MRTS

- 2
al
naneuver
batween 3-10,00o yards on On a 2-2 would
imtely 16,coo yards.
Only two ox the three criginal lights were observed on the radar, There was a 31
considerabla amount of "anov" but the eloser blip vas distinguished easily. A check
.
these lights on 3 *
I

vas xx & - B
horison, although the report states that a check indicated no ground return signals —
vere received. A vire vas sent to Carsvell AvB requesting information as to whether I
the objects noved or not. Radar operators at Carswell AFB stated that this was ex-
treme range of radar and operator could not tell vhether they moved in range but they
did not move in asimuth. Also stated that blip did not change side. Blip disappeared
- pick them up
sful.
AFIC Comment and Comelusion ATIC Coument and Comclusion
Fram.
inversion or light.
1Y
I

41 CLASSIFIED
ER/jw
HEADQUARTER19TH AIR DIVISION
Carswell Air Force Base
Fort Worth,. Texas
7DI 350.09 - 6 JUL 1953
SUBJECT: U Uniden February 1953
TO: Commarder
Air Technical Intelligence Center
Wright-Patterson Air Force Base
Dayton, Ohio
1. Reference your
2. ATIC Form 332, forwarded to this headquarters to this headquarters by referenced by rererenced
letter, has been completed and is letter, has been completed and is returned herewith as returned herewith as Inclosure Inclosure #1.
FOR THE
Dev Brouuds Des Brouds
- -
29
1 Incl: Incl: CARL T. GROUNDS
ArIC Form 332, completed ATIC Form 332, completed WOJG USAP
29 June 1953 (1 copy) Ass't Adj.
If inclosure no. - is withdrawn
(or not attached) the classification
of this correspondence will be down-
graded to Unclassified in
accordance with AFR 205-1.
DOWNGRADED AT 3 YEAR INTERVALS:
DECLASSIFIED AFTER 12 YEARS.
DOD DIR 5200.10
IED
6 147$
4

1
ACTION
1953 FEB 69: 18 15s
13891 o
173119 l.ata
HA389 DICATCHED 3
IYA204
UNCLASSIFIED
WDA205
JWFQB A065 ATIC
PP JEDMI I JEDWP JEDEN JEPHQ 444
wok
E JWFAD 8S6
1323352ZNJ 1323352 zNJ
M CGADIV 19 CARSWELL L AFB TEX AFB TEX DOWNGRADED AT 3 YEAR INTERVALS; DECLASSIFIED AFTER 12 YEARS.
to To DOD DIR 5200.10
JEDMH/CGSAC OFFUTT JEDMH/CGSAC OFFUTT AFB OMAH T AFB OMAH NEBR
LEN/CGAF & CARSWELL AFB TEX LEN/CGAF 8 CARSWELL AFB TEX
C
JEPHQ /DIRECTOR OF INTEL HQ USAF WASHINGTON 25 DC
JEDWP /AIR TECH INTEL CENTER WRIGHT-PATTERS IEDWP /AIR TECH INTEL CENTER OHIO ATTN ATIAA2C
JEDEN/CG INT AFB COLORADO SPRING COLO
D/7A2 644. FLYCBRPT. 3 BRIGHT LIGHTS WER FIRST VISUAL
ICRIZONTAL ECHELON IN BROKEN FORMATION. THIRD SIGHTING WAS A VERTICAL
CHELON HOVERING WIHT LIGHTS MOVING AS INVERTED PENDULM. A FOURTH
SIGHTING WAS MADE BY B-36 GL TAIL RADAR. SIGHTING S WERE MADE 13 FEB
3 BETWEEN D235 AND B390 FOR A PERIOD OF 1D TO 15 MIN. THE OBS WAS"
PAS WAS MR J V RUTH 12S5 GRACE ST WEATHERFORD TEX. WEATHER AND WIND
FOADITIONS AT TIME WAS CLEAR. SHOR IGHTING A 3-36 APPROACHED
NY THE WEST.
DECLASSIFIED AFTER 12 YEARS.
14/21372 FEB JWFAB DOD DIR 5200.10 5
UNCLASSIFIED Cy1 5
(

4. Mra then pickad up blips aireraft
310, s station 47, at Convair, Fort north Jivision.
. Mr observed only two of the 3 oridnal A.-41. There
waa'a considaral of "snow" but the
. Besides neased this
ineideat.
APPSOVED
Director of igence
.
r DECLASSIFIED AFTER 12 YEARS.
DOD DIR 5200.10
Roturn (3 copias)
-
L 5W323 1212

4. ir Cpthen aicked
310, station 47, at Convair, Fort Worth Division. The lapse of tire betwaon visual
and first ra:ar signting W.A 8n estimated 2 minutae, The Lights were observed I at a
maximain aziutn 80 18-r808 un,D0txeen 45-6. degrees vertical angle, between
8-10,0C0 yards on etchings. Cn a 2-2 multiplier, this distance would be approxi-
mataly 715,000 yards. A sketch of the radar presentation received attached as an
inclosure, in
5. Ar There
Tex M 3553
orth,Tex WI 1300
ortn,Tax
COMATS of preparing officer:
r auta is employed 76. Eis total
Thiat is 4 /9459. ae has apcroximately 3 months experiance with the ArC-Al,
-a years ship B en.gineering stage.
Chorle
USAF, Asat Cpnal Intel
DECLA IFIED AFTER 12 YEARS.