PROJECT BLUE BOOK

1. DATE 2. LOCATION 12. CONCLUSIONS
0 Wos Bulloon
26 Jan 51 36 dag 401 N - 130 deg 50! E 0 Probably Bolloon
3. DATE-TIME GROUP 4. TYPE OF OBSERVATION 0 Possibly Balloon
Local_ Ground-Visual Ground-Ruder 0 Was Aircraft
0 Probably Aircraft
CMT 26/14051 D Air-Visuai Air-Intercept Radar 0 Possibly Aircraft
5. PHOTOS |6. SOURCE 0 Was Astronomicai
Yes Probobly Astronomical
No Radar Ops Possibly Astronomical
7. LENGTH OF OBSERVATION 8. NUMBER OF OBJECTS 9. COURSE Other. Weather
800 Insufficient Dota for luation
15 min 1 Mda Varied Unknown
10, BRIEF SUMMARY OF SIGHTING |11. COMMENTS
Unidentified object made pass ship Information indicates that the radar
Guadalupe. Speed bargets possibly could have been caused
Radar only. following: Interference
Grom another radar set Interference from
the detecting radar set itself and
weather.

preted radar 'target data is very difficult and can best be anelyzed by oersonal
interrogation by an analyst of the personnel operatins the redar set involved."
1 Incl COMN E. LIBPERT RIJ/aW
PADNOT Major, USAF 55170
Chief, Electronics Section B 263A
Technical Analysis Division P A17
Intel
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(O OT RITE BELOTHIS LINE)
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8

DRAFTER EXTENS ION NUMBER ADOREDVEES PRECEDENCE
E FLASH
CTE 96.21 0 EVERGENCY
D OPERATIONAL
HOLLOY 9 CTG 96.2 BOSDIATE
RELEASED BY RHPPPP
10 MAR 1951 ( aNTINE
DATE __
0703/10 MAR FLASH -
Toc CO HIN D EVERSENCY
DECOOED DY 0 OPERATIONAL
NOIACOAS COMNAVFE DSRDIATE
TYIPSO BY— NAYLOR D PRIOIMPPPPP
BERKHEISER ROUTINE
ROYTED BY. C) DEPERRED
: Untass obherylas indicaied, thls mussnge wiil da transalttad Night Hossage Prooadunes
- -6190
-(0at0/81-3rM9)(00T) - FCC 1o.
= On outgolng nsssagas olaass luave about i inch clear spacs bst
READDRESSED BY ( COMNAVFE AS 100230Z INFO CNO,
SA4 ENROUTE ASP MISSION FOR CTE 95.11 CBSERVED AND TRACKED HICH SPEED
BEARiNG 320 TRUE 15 TC RANGE. : A/C HEADING 27O TRUE. TARGET
SMALL CRAFt AND LAND. 1 IDENTICAL 2ND tARgEt OBSERVED FOR APPROX 10
SecS at 0905301 bearing 085 true at 25-30 milE Range same COUrse
ZATHER OVERCAST AT 3OOO FEET. TARGETS VERIEIED BY NAVIGATOR.
OMNAVFE.
UNCLASE Paraphraas NOT Required JM 70
Conbult dniloislying

(b) Frequency of f radar.
(c) Pulse width.
. .
. (d) T
(0) Altitude of aircraft when targets were detected.
- (f) Were target blips they spotty and of
unequal amplitude?
(g)
Is this elongation azimuth?
UNCLASS
T
.

message ae
follows: longated to about 3/3 inch'.
dotails
this office would CODy thereof for inclusio project
filo."
2. Incl J. E. LIEBERT
CSAP Itom 2, TI M.74 Mer 51 Major, USAF
UNCLASSIFIED
515-39359

TT-091-AM, 15 MAR 51, INDICATES THAT THE x0
LNKNOWN RADAR TARGETS REPORTED THEREIN
POSSIBLY WERE DUE TO ABNORMAL WEATHER
CONDITIONS.
PREVIOUS REPORTS HAVE INDICATED IHAT
ABNORMAL IAY CAUSE
A VERY HIGH- INFORMATION
RATE, WHE EMENT IS DUE
To SEVERA CAUSED
SAME
NOT
AS SHARPLY
TARCETS. CONTAINED
.

EVALUATION INCLUDES THE FOLLOVING:
1. VHAT TYPE ARGETS.
INFORMATION
4, TY SPARK GAP)
5, AL ARGETS
WERE DET STEADY
WHILE
C7 UNEQUAL IS MEANT BY
BADAR BLIPS EL INch anD 1/8
MUTH.
AIRCRAET TECTION
OF UNKNOWN AVE RADAR
PERATIO TERD ANY DOD DIR 5200.10 >
EOUIPME
OTHE
THIS RI PORT.
IT SHOULI REALIZED IFIED
OF VE RPRETATED
IS
CAN BEST E ANALYZED BY PERSONAL INTERROGATION
BY-AN-ANALYST-OF:THE CRSONNEL -OPER
THE RADAR SET INVOLVED.
5/5
END I
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+

READDRESSED BY For InFO to cincfe/FeaF(AF)/ -
cIncpaCFLt/COm 7 /OTF 77
READORES me
.
YOUR 271 MY 26/110Z. P PLANE CIRCLING GUADALUPE DURING
MEPSA
..
TERVALS! 65
ONCLAS SIFIED 1 N
DOD DIR 5200.10
03(32)...C0G . , (32)
1/257 8
002...CNO
071M--0 20- JM
PARAPHRASE NOT REQUIRED. CONSUI BEFORE DECLASSIFYING.

PRtORITY PPPPP
0 ROUTINE
0 DEPERNED
YOR CODE ROOM QO457/2 FLASH
DECODED BY LONG EMERGENCY
OPERATIONAL IIMMEDIATE
TYPED BYWAIKLN PRIORITY
0 ROUTINE
ROUTED BYDUDROW 0 DEFERREO
Unless otherwise indicaled, this message will be fransmitred with Night Message I ecedence
CORRECTED DIST - 9990
(date/time group) ( ner/cma No.
READDRESSED
READDRES
31
SA7 PILOT COMDR SMALE SQUADRON ELECTRO ONICS OfFICER CRE
AND REGULAR PLANE RADAR OPERATOR OBSERVED AIRBORNE
F
MAKE ONE PASS ON GUADALUPE (AO-32) AND 8 ON OR OVER OWN AIR-
EE RADAR
CRAFT. 1 TARGET SPEED COMPUTED TO BE 3OOO MILES PER HOUR, R
on 30 mile scale with 10 mile Markers, T TARGET MOVED FROM 10
Mile Marker to 20 Mile E MARKER IN 12 SECONDS. F RADAR BLIPS
ELONGnATED tO 3/8 iNCh I When Target Making Run on Guadalupe
161
TARGET TRACKED OUT tO MOReY BeLieves targeT cAme FROM
UNCLAS 68
10--08019-1 a.% GOVENY IINTAS DENCT
JA1 J
7.

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ill
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03(32)...COG
002..:CNO D=
at
ADD:.A2.G2C Agg.O1 29955.25 03(32) 1/29/51/E0
Origlinctor COMFAIRWING 6
Page
c 9990
OPNV-13-48ET 10-A1

ADNO.E/FORII
RECEIVED
SY AFOIN-V/TC FROM COUFAIRMING 6 ON 25 AND 28 JAN 51. REQUEST THAT -
EVALUATION AND CONNENTS BE FORVARDED CONEST. CALLE DATED
25 JAN S1 READS AS FOLLOWS: UNCLA
"SA7 PILOT CDR SHALE SQUADRON ELECTRONICS OFFICER ( CRE d
AND REGULAR PLANE RADAR OPERATOR ODSERVED AIRBORN RADAR TARGTS
FROM 2d14051 TO 2514201 AT LAT 36-40N 130-50E AMKE E ONE PASS ON -
GIADALUPE (AO-32) AND 8 ON OR OVER OUN AIRCRAFT, 1 TARGET SPEED
COMPUTED TO DE 3OOO NILES PRE NOUR. RADAR ON 3O MILE SCALE WITIL
1o WILE HARDERS. TARGET WOVED FROM AIO NILE MAKER TO 2O NILE -
MARKER IN 12 SECONDS. RADAR BLIPS ELONGATED TO 3/8 INCH ENEN TARGET
MAKING RUN ON GUADALUPE 15 MILES AWAY AND 1/8 INCH ON RETIRING RUN MAKING RUN ON GUADALUPE 15 MILES AWAY AND 178 INCH ON RETIRING RUN
ON THOSE MADE ON PLANE. TARGET TRACKED OUT TO 30 MILES. AP ON THOSE MADE ON PLANE. TARGET TRACKED OUT TO 3O MILES. DP
CELIEVES TARGET CAME FROM OVERIEAD AND ONLY APPEANED ON SCOPE WHEN CELIEVES TARGET CAME FRON OVERNEAD AND ONLY APPEANED ON SCOPE WHEN
-TUZ-TANGER CAME INTO HADAR MAMGE. NADAR OPERATING-SATISGACTONILY -THP-TAPGER CAME INTO NADAR MAMGE. NADAR OPERATING-SATISGACTONILY*
AT RANGES BELOWSO, MILES. GUADALUPE ONLY SHIP IN REFUELING FROUP
AND NO OTHER RADAR TARGETS UN AREA. AND NO THER RADAR TARGETS I AREA. NO VISUAL SIGI NO VISUAL SIGHTINGS. C CLOUD -
CADLE DATED 28 JAN STREADS AS FOLLONS: -
"PLANE CIRCLING GRADALUPE DURING OBSERVATIO (, COSRSES CF TARGETS -
NOT AVAILABLE AS COURSES OF PLANE AND GUADALUPE NOT RECORDED. ALL
TARGETS APPEARED TO ORICINATE FRON SCOPE CENTER AND RETIRE EXCEPT -
FOR 1 TAIGET APPROCH TO, OVER AN D RETIREMENT FROM GUADALUPE.
RADIATION OF ALL TARGETS FROM SCOPE CENTER CAN POSSIBLY BE EXPLAINED
3Y APPROCHES SEING MADE ON PLANE FROM DIRECTLY OVERNEAD WITH TARGET
ENTERING RADAR DEAM WIDTH ON RETIREMENT ONLY. F RADAR BEAM VIDTH
, 15 DEGREES. CONPLETE FOLLOU EARLIEST."/S E C RE T/
JASION.COPY COPY

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MCLIOACOLA
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UNC
CENTER -
BEFORE DECLASSIFYING
5116
NR 17 5 FEB_ 51 D80068
2
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WFE3
JEP B59EE -
${}
IR JEDOR
NCIS-
c MheI
DE JEPCISC
(
TERSON AVB DAYTON NOHIO

G7
—
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Captain, USN
Ohiel.
SNSD
611

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1. Mhat type radar detected the targets
2. Frequency of 2 radar
3. Pulse vidth
4. Type modulator (hari tube, snark gap?)
detected
6. : Mere target blir served hey spotty and of
unequal amplitude?
7. What meant by elongating 1/8 inch?
s during tl
"ere any other eirborne ction
- of unkno'n tergets?
12. Were there eny aireraft durins thetime of datection 'of
unkmown targets and
UNCLASSI
5IS-1
WF-1-3) OCT 49 AMC Form No. 5 (Rov 29 Jul 47) 4,652MA CONU CN-OHER STOE This form replaces AMC Form No. 10-3, which will
bo used until stock on hand ure exhousted.