PROJECT BLUE BOOK

1. PROJECT ARD
1. DATE E 2. LOCATION 12. CONCLUSIONS
0 Was Balloon
3 October 1951 Kadena AFB, Okinawa 0 Probably Balloon
3. 4. TYPE OF OBSERVATION Possibly Balloon
Locol Ground-Visual Ground-Rodor 0 Was Ancraft
Probably Aircraft
GMT._03/12277 Alr-Visuol Air-intercept Rador 0 Possibly Aircraft
5. PHOTOS SOURCE 0 Was Astronomical
Yes D Probably Astronomical
No Military o Possibly Astronomical
7. LENGTH OF.OBSERVATION 3. NUMBER 9. COURSE Other_ UNIDENTIFIED
:000 Insufficient Dots for Evaluation
Unknown
N/A N/A
O. BRIEF SUMMARY OF SIGHTING 11. COMMENTS
SEE CASE FILE. . UNIDENTIFTED
.

IFIED . .
.
. /
-240 . 30°
.
-
-160 -

1 1
50 I . I
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300°
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FEAF 112 25-52
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ALTITUDE OF STATION IN FEET
ANGLE OF ELEVATION 011
t ANGLE OF DEPRESSION
*
2 o 200 09 O 200 3 0001 O00
7
220 200
/
/
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220 220 200 220 20 200 330
HAAAR
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1

PAT TERN
OBJECT
LLAVING
HIGH BEAM
I
-
a 1 OBJECT
ENTERII
LOWBE.
↓
70 80
90
100
IIO
120
130
140
150
1 160
- 170
. 18C
ELIGHT LEGS

1
1
;
/
1
-
1
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1 1
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10 20 30
40 50 60
70 80
90
100 IIO
VERTICAL LOBE DIAGRAM
120
CPS-1 HIGH a OV BEAM
=
-
LEGENDS
.

unidentified aerial object.
3 is aohodl. of this
correspondence will be downgraded to Restricted in accordance vith paregraph 25E,
AFR205-1.
1 Inel HERAN, Major,
Sealed Envelope Chief, Aizoraft lnd Propulsion Eranch
Technieal(Analysis Division
Air Technical Celligence
TO ATIAA-5 FROM ATIAE-2 52 NO. 2
Capt:/James/mk
55170/Bldg 263A
advanced conflicting explanations of the phenomena, it considered that
theorizing by ATIAE pure conje
Aembr
1 Inol
n/c Chief, Eleotronics Branch
Technical Analysis Division
UNCLA
T52-16651
DDFRBS0 REPLACES NME FORM9 9S. I OCT 4. WHICH MAY BE USED 106-5101-3 U. S. GOVERNN PRLNTING OFVICE :1912 O-988875
.

30°25° 20° 15° 9o 8° 70
50
45
8
- .
40
/
35 - - T
HEIGHT /
\
1 \
30
N 1
- .
FEET 10
5
0
0 I0 20 30
40 50 60
70 80
VERTICAL LOBE DIAGRAM
CPS-1 HIGH a BEAM -
. .

.
ALTITUDE OF STATION IN FEET
ANGLE OF ELEVATION 1
ANGLE OF DEPRESSION
o O 200 3 55 0001 O0S1
220 350
4
7
/
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220 200 20 2020 200220
RAAAR WIIIE NS
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0 10 20 30
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ALTITUDE OF STATION IN FEET
ANGLE OF ELEVATION 11
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2 o 09 O 200 45 0001
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RANGE
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CTUAL PLOTS THOSE OBTAINED FLIGHT LEGS
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40 50 60
70 80
90
VERTICAL LOBE DIAGRAM
CPS-I HIGH a LoW BEAM
F
LEGENDS +
OUTBOUND PLOT ACTUAL PL
INBOUND PLOT
-*** APROX LOB PATTERN
1
INCLOSURE NO.8
FEAF 112 NO.IR-25-52
752-/325 .

.
.
.
-
:
20° 80° 00 140^{160
.
. LAND SURVE
CPS-1
1

+
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ANGLE
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10
160^}$ 240 260 280 300 320 340 360
ND SURVEY PROFILE

120°
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SCALE: 1:500,000

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60
50
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10
20 10 90°
10 20 30 140
.
110
120
130
140 150° -

20
30
40
1
50
. 130
210° 140
/ 180° .
HORIZONTAL COVERAGE DIAGE
LEGEND
MAXIMUM SEARCH RANGE (CPS-1)-4,000
INCLOSURE 3 UNCL 1 n
FEAF 112

J00
12
.
.

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I0 20 30 40 50 60 80 90 100 11O
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dd 120°
a
70-
- 80-
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+
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1 1
110 150
HORIZC COVERAGE DIAGRAM
(CPS-1) -500 FEET SCALE: 0,000

X
50
40
30
- 20
10
IIO 60 20
10 20 30 40 50 6(
10
80-
90-
1
a
210° 110
HORIZONTAL COVERAGE DIAGRAM
LEGEND
MAX. SEARCH RANGE
UNCL ED

9
300°
81
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. 2(
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.. 270° 20 10
10 100 90.80 70.60
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HORIZONTAL
LEGEND:
MAXIMUIMSEAR
a

1
1
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1
140 : 150° .
-
180°
HORIZONTAL COVERAGE DIAGRAM

.
- 7
. . i
--
240°
. 4
.
. 210°
LEGEND 1
MAXIMUM SEARCH RANGE (CPS-I)-20 FEET .
- LESS THAN 33% PICKUP (CPS-1) .
LESS THAN 66% PICKUP (CPS-1)
INCLOSURE:

X
11
+ 150°
. 1
AGE DIAGRAM
.
JNCLA E SCALE: 1: 5

1101
×- 120-
1
1
1
COVERAGE DIAGRAM
UNCLASSIFIED
-

120°
-
.

.
/
/
/
+
+ I M . 1 +7
1
1
1
1

Base,Oklnawa. -r
1 -
2. This material was collected assified.
Reconnaissance I Branch, D/I FEAF.
;
D
Y CHARLES
Brigadier General, USAF Brigadier General, USAF
Deputy fe Deputy fo Intelligence telligence
.
.
.
DOWNGRADED AT 3 YEAR INTERVAIB: DECLASSIFIED AFTER 12
. th
DOD DIR 5200.10 YEARS.
.
E.__.1NCLS
1. Track of Radar Plot 6. Horizontal Coverage, 30,000 ft.
2. Horizontal Coverage, 500 ft. 7. Land Survey Profile :
3. Horizontal Coverage, 4000 ft. Lobe Diagran showing track
4. Horizontal Coverage, 10,000 ft.
5. Horizontal Coverage, 20,000 ft.
DISTRIBUTION BY ONIGINATOR File, Cy
D/I_USAF, Cy #1 IN-Rec, FEAF, Cy #7
ATIC, WPAFB, Attn: ATIAA-2C, Cy #2 IN-EVAL, FEAF, Cy#8
D/I Alaskan Air IN-REA (ATLO), PEAF, Cy19
WOTE THIS DOCUMENT CONTAINS INFORMATION AFFECTING THE NATIONAL DEFENSE OF THE UNITED STATES WITHIN ANINGOFTHLISPIONAGE UT XUGC
3I AND 32 AS AMENDED. ITS TRANSMISSION OR THE REVELATION OF ITS CONTENTS IN ANY MANNER TO AN UNAUTHORIZED PERSON IS PROMIDITEO BY LAW.
IT MAY NOT BE REPRODUCED IN WHOLE OR IN PART, BY OTHER THAN UNITEO STATES UN ISSION OF THE DIAECTOR OF
INTELLIGENCE, USAF.
:

FROM (-AgRCV) KE/ORT NO.
ATIL Office, D/I FEAF IR-25-52 PAGE 1 CF 11 PACIS
. Ori,ginal repo from site #5l, 529th
SUBJECT: Uniden 8 October 1951
TO : Operations and Training C Section
529th A.C. & W. Group
APO 239
1. UNIDENTIFIED A DATA:
Initial Position 2742' 128°10'
Time 1327 2222 ICL DATE October
ADCC Track I Number Heading West No. of A/C One (1)
Ground Spaed See Remarks MPH Altitude Unknown
Maneuverability Extremsly Maneuverable
Type of Aircraft Unknorn
Aircraft Markings Unknown
Last Position of A/C 29051 N 1270251 E
Time_ See Remarks Z CL DATE 3 October 1951
2. OBSERVER DATA:
Method of Sighting (Visual, Electronic, etc.) Electronic
No attompt rade to sight object visually. No known visual sighting.
Observing Equipment Cbaervers and radar
equipment vere at the Okinawa GCI Station, Site #5l "A".
Site A 26021' 12727 E Site B N
Site C N E Site D 1,p
Site E N E N E
Reliability 11 I1
Education " "I
Years of Milita Ago
3. INTERCEPTION DATA: No interception
Interceptor A/C: Type No. of A/C
Scrambled at 2 at
Azimuth Range Tine
Altitude
4. HIGHER HEAD-UARTE
Individual Time Agencies Time
Lt. Col.T. D. Bradlay 1335_2 Attarpted to pass data to Itazuke Z
Chief, Air Detense Z ADCC wi thout Z
20th Air Force Z Cwintarferenca. 2
Priority secrat radit con
FEAF Oct 4 51
* Substitute Object f for Aircraft in the title and paragrauh 1.
NOTE: THIS DOCUMENT CONTAINS INPORMATION AFFECTING THE NATIONAL DEFENSE OF THE UNITED STATES WITHIN THE MEANING CF THE ESPIONAGE ACT, 5O U S. C.-
31 AND I2. AS AMENDED. ITS TRANSMISSION OR THE REVELATION OF ITS CONTENTS IN ANY MANNER TO AN UNAUTHORIZED PERSON IS PROHIBITED BY LAW
IT MAY NOT LE REPRODUCED IN WHOLE OR IN PART. BY OTHER THAN UNITED STATES AUR FORCE AGENCIES. EXCEEI BY FERMISSION OF THE DIRECTOR OF
INTELLIGENCE, USAF. UNCLA IFIED
TS2-1 3258
10-55870-1

Nons
Results:
6. RADAR AND RADIO DATA:
Condition of Radar Equioment Good condition and operation normal.
See Remarks. -
See Rerarks : i
—
Radar interference ar - None
VHF AND HF VHF AND HE Radio Radio Interference ronce consisted of None on None on VHF. Heavy CW VHF. Heawy CW .
kcs. at 135oz 3 October kcs.a 502 October 1951.
appearance:
GCI SITE "A" #51 GCI SITE "A" #51 GCI/EN SITE "B 752 GCI/EN SITE "B" 752 EWY SITE "C" #53
AN/CPS-1 AN/CIS-1 Operative Operative Inoperative SCR-270DA Obe rative
AN/CPS-I Coerative AN/T.S-1B AN/T.S-1B operative operative AN/TPS-1B Operative
EY SITE UD" #54 EY SITE "D" #54 EV SITE "E" 55 EV SITE "E" 155
SCR-270DA VDA Operativ SCR-27ODA ODA Oparative
ANTIS-1B Standby AlL/TPS-1B Inoperative
AN/TPS-10 Standby 4
7. INDIVIDUAL RADAR PLOTS:
THE TRK RPTG TRK GRID ROP* NO.HGT I0 FADES REMARKS
Z NO. SITE DIR BEAR DIS A/C 125x0/10
1327:00 86 51 West 014 90 1 Unk Unid Initial Plot,HighBam
1327:15 12 11 " 004 90 1 "1 11 I1
1327:30 1 " n 352 90 11
1327845 !1 1I " 1559 95 "1
1323:00 "1 NM 359 112 11 = i~
." " " 3110 152 I1 11
I1 11 North 355 200 " " "1 T.P. Lon
I1 " 3552 210 II tt "1 " 11 1 1t
1 352 225 " n1 "1 """1 1
11 365 247 "1 " Echo disappeared in-
5 to the sacond trars-
nittad pulseg
Wrom 26° 21,1 55" N 127 17' 19"
.
NOTE: THIS DOCUMENT CONTAINS INFORMATION AFFECTING THE NATIONAL DEFENSE OF THE UNITED STATES WITHIN THE MFANING OF THE ESPIONAGE ACT, 5O U S C -
3I AND 32, AS AMENDED ITS TRANSMISSION OR THE REVELATION OF ITS CONTENTS IN ANY MANNER TO AN UNAUTHOPIZED PERSON IS PPOHIBITED BY LAN.
IT MAY NOT DE REPRODUCED IN WHOLE OR IN PART, BY OTHER THAN_LINITED STATES AIR IFIED PERMISSION OF THE DIRECTOR OF
INTELLIGENCE, USAF.
M370- OPPICE

1 90-
1 100-
1 110-
120-
1 . 130-
: 240°
140-
.
150-
.
160-
170-
200-
210-
. : 220-
230-
210° 240-
MAXIMUM SEARCH RANGE (GPS-I)- 30,O00 FEET 250-1

.cato scope,
b. Sgt
first detected this object. on a baaring of tatute miles
from the Gct Station He statas.
was adjusted at a barely discernable level brilliance at an
intensity wh ns noise level Ts
d. Thero we precipitation echos on this scope at tho time of the
conjunction with or simultaneous-
were seen on this s cope by this
operator during his
NOTE: THIS DOCUNENT CONTAINS INFORMATION AFFECTING THE NATIONAL DEFENSE OF THE UNITED STATES WITHIN THE MEANING OF THE ESPIONAGE ACT STU S. C
31 AND  ASAMENDED ITS TRANSMISSION OR THE REVELATICN OF ITS CONTENTS IN ANY MANNER TO AN UNAUTHOPIZEL PERSON IS PROHIBITED BY LAW.
IT MAY NOT BE REPRODUCED IN WHOLE OR IN PART, BY OTHER THAN UNITED STATES AIR FORCE AGENCIES, EKCLPT DY PERMICSION GF THE DIRECTOR OF
INTELLIGENCE, USAF.
FIED
SAATO-1 PICE

g. The object's ground LS00 curing,
the first minute of detection. validi ty of
the operator's statement that he initially sar consecutive radar
echos and that he wrote their range and azimuth position
of datection
of consecuti ve plots was made. The high beam scope operator states that
he did not see any radar echos between 112 and 152 miles al though the
area was swept by the radar beam However, he believes this lack of detect-
on the low beam short range This cond tion continued an nd a short
time after the unidentified object disappeared m the scopes part the
island of Okino Erabu Shima (height 807 feet. bea ring 37 degrees, 3 stat-
ute miles from the GcI Station) was seen on LOw The unidenti fied
object's echo was never detected on the low beam short range During
the evening and prio unidentiflied's opaarance the copes on
which it was seen had been checked by and the azimuth read-
ing of syncronized and oriented north.
ROTE. THIS DOCUMENT CONTAINS INFORMATION AFFECTING THE NATIONAL DEFENSE OF THE UNITED STATES WITHIN THE MEANING OF THE ESPIONAGE ACT, SO U S, C.-
21 AND S AAMENDED. ITS TRANSMISSION OR THE REVELATION OF ITS CONTENTS IN ANY MANNER TO AN UNAUTHORIZED PERSON IS PROHISITED BY LAW.
IT MAY NOT BE REPRODUCED IN WHOLE OR IN PART, BY OTHER THAN UNITED STATES AIR FORCE AGENCIES, EXCEPT BY F FERMISSION OF THE DIRECTOR OF
INTLLLIGENCE, USAF.
UINC
58870-

tacted an unidentified echo on the Lcato )scope,
high beam of
b. Sgt 829. Sr A 7350,
first detected this object on a bearing of Oll4 degraes statute miles
seen in
by this
operator during'his tour position. :
NOTE: THIS DOCUMENT CONTAINS INFORMATION AFFECTING THE NATIONAL DEFENSE OF THE UNITED STATES WITHIN THE MEANING OF THE ESPIONAGL AOT, SE U S, C.-
IT MAY AOT BE REPRODUCED IN WHOLE OR IN PART, BY OTHER THAN UNITLD STAIES AIR FORCE AGENCIES, EXCIPT LY PERMCSSION CF THE DHRECTOR OF
INTELLIGENCE, USAF.
OPNICR

AN/CPS-1. He has been in the service three 3)years and four months
and has graduated f om the FEAF Air Defense School (radar operator). I His
civilian education consists of three (G) years of high school. He is 2l
years of age and s consider tremely r able s specialty.
n. Pyt hias rine
89 ton. vbich corai
radar mechanic ground equioment graduet 'adar repair-
man's course at Keesler Air e Base, Mississippi. en in the
service three (3) years and le is 2l year
school graduate and sidered axtremely reliabl
Captain USAF
Senior ntroller, ADCC
ON
NOTE: THIS DOCUMENT CONTAINS INFORMATION AFFECTING THE NATIONAL DEFENSE OF THE UNITED STATES WITHIN THE MEANING OF THE ESFIOGAGE ACT, SO U S. C -
3I AND SZ, AS AMENDED. ITS TRANSMISSION OR THE REVELATION OF ITS CONTENTS IN ANY MANNER TO AN UNAUTHOLIZED PERSON IS PROHISITED BY LAW.
IT MAY NOT BE REPRODUCED IN WHOLE OR IN PART, BY QTHER THAN UNITED STATES AIR FORCE AGENCIES, EXCEPT BY PERMISSION OF THE DIRECTOR OF
INTELLIGENCE, USAF.
16-85670-1 TINUOPPICE

Altitude Wind From Speed (Knots)
Surface 600 11
5,000 $70^ 6
10,000 3100 5.
15,000 220 25
20,000 250° 25
25,000 $270° 35
30,000 270 39
35,000 270° 16
40,000 Unknowm Unkmo -
9. REMARKS:
a. On 3 October l9Sl at l327z a radar opar e Okinawa Ground Con-
trol Intercent Station, Site #5l ' 55" N. 127 19"Edo-
tected an unidentified echo on the pla scope,
high beam of the AN/cPS-l Search Radar.
b. Sgt ACRY Oparator. AF 27350,
first detected this object a bearing of 0l4 degrees, 90 statute miles
from the GcI Station. He states that the radar blip was casily seen
d. Thero were ecipitation echoa on this scope at the time of the
sighting and no other echos wern seen in conjunction with or siultaneous-
this
tour of position.
31 AND ? ASAMENDED. ITS TRANSMISSION OR THE REVELATION OF ITS CONTENTS IN ANY MANNER TO AN UNAUTHORUEL PEPSON IS PAOHIBITED BY LAW.
IT MAY NOF BE REPRODUCED IN WHOLE OR IN PART, BY OTHER THAN UNITED STATES AIR TOLCE AGENGIES, E/CEPT DY PERMISSICN OF THE DIRECTOROF
INTELLIGENCE, USAF. FIED
52A70-1

3. The antenna
at 15 seconds per revol
knorm of
The frequency was 2700 MC for the low beam and The pulse
width was 1 IS and the PRF 350.
.
ed by possibly geveral ob ject: mation, The angles
tion to the'radar might indicate somehat less of a roturn should the target be losing
latitude and increasing range at a proportion airly
constant angular range from the radar site.
ADTE: THIS DOCUMENT CONTAINS INFORMATION APFECTING THE NATIONAL DETENSE OF THE UNITED STATESA NITHIN THE MEANING CF THEESPIONAGE ACT, SO U S. C. -
31 AND IZ. AS AMENDED. ITS TRANSMISSION OR THE REVELATION OF ITS CONTENTS IN ANY MANNER TO AN UNAUTHOA ZED PERSON IS PROHISITED BY LAW.
IT MAY NOT FE REPRODUCED IN WHOLE OR IN PART, BY OTHER THAN UNITED STATES AIR FORCE AGENCIES ON OF THE DIRECTOR OF
INTELLIGENCE, USAF. UNCL
10-58570-1 4 PTICE

would tend t reasoning,
the calculated beam pattern ". All of this has been considar-
ed to establish a reasonably accurata point whare the unidentified objoct left the high
0o lor
1
. The supoler rentions that
the Bogie was equipoed
back through 1 sy3tem causing the umusual brjlliant display of ng rana
KOTE: THIS DOCUMENT CONTAINS INFORMATION AFFECTING THE NATIONAL DEFENSE CF THE UNITEO STATES WITHIN THE MEANINS OF THE ESPIONAGE ALT, SI U S C-
3I AND 32. AS AMENDED. ITS TRAYSMISSION OR THE REVELATION OF ITS CONTENTS IN ANY MANNER TO AN UNAUTHORIZED PERSON IS FROHIBITED EY ! YW.
IT MAY NOT BE REPRODUCED IN WHOLE OR IN PART, BY OTHER THASI UNITED STATES AIR FORCE AGENCIES. LXCEPT BY PERMISSION OF THE DIRECTORILE
INTELLIGENCE, USAF. UNCLASSIFIED
10-62:0-1 &t B. CAUTEN

the two beams to be off several dagrees.
.
3. I Letter of transmittal - lst Indorsement by Headquarters, 2 Force:
319.1 (9 Oct 51) OPN AD lst Ind
- IR FORCE, APO 239
-
1. Subject repo bean this headruarters pending
requires special calibration of the radar equipment upon which the
object was sighted and is not completed at this tine. Every effort
will be made to expedite this calibration and a complete report of
the findings and conclusions forwarded your headquarters in the
irmediate future.
FOR THE GENERAL:
Incl: - s
n/c -. TAISON A
" Lt Cot, USAF
Adjutant General
UNCL
NOT& THIS DOCUMENE CONTAINS INFORMATION AFFECTING THE NATIONAL DEF ENSE OF THE ONITED STATES WITHIN THE MEANING OF THE ESPIONAGE ACT, SO UL S, C.-
3I AND 3, AS AMENDED ITS TRANGMISSION 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 DIRECTOROF
INTELLIGENCE, USAF.

maintain a state
of constant veloci ty, as indicatad in paragraph l.a. above, it consi dared
at all probable
conditions cutlired in bcth paragraphs l.a. and 1.b., that is, maintenance of a
constant high velocity couplad with a rapid change of direction. The only forces
of magnitude affecting the velocity I heading of
a. Initial momentum.
aspect. vould indica-
tive of the f'a directional or : sei-directional ech urce Such a
source would ' tuned stubs carried by
the object, such a physical length and spaced such that excit-
ation re-radiation of tha exciting wave would take place in a predetornined
tion, or (b) radiation within the missile proper A large
ROTE: THIS DOCUMENT CONTAINS INFORMATION AFFECTING THE NATIONAL DEFENLSE OF THE UNITED STATES WITHIN THE MEANING OF THE ESPONAGE ACT, DO U S. C -
IT MAY NOT DE REPRODUCED IN WH I PART, BY OTHER THAN UNITED STATES AIR FORCE AGENCIES, EXCEPT BY PERMISSION OF THE DIRECTOROF
INTELLIGENCE,
IED
10--56570-1

The equipment not operating or was not operating prope frequency
of the AN/cPs-4 sigal were substantially different, the
missile was at such an altitude as to be out of the range of the equipment. In
the case where the AN/cPs-4 was operating, it is felt that a combination of (b)
6. A recapitulation of the above data definitely
of the unidontified object reported by Site #5l as being a ranufactured rissile,
possibly guide ranspondar operating in the "S" band
region.
7. Whie it is underatood that the abova assumn and though based on the
facta given,ara maraly Easumtions. it the possibilities outlined
NOTE: THIS DOCUMENT CONTAINS INPORMATION AFFECTING THE NATIONAL DEFENSE OF THE UNITED STATES WITHIN THE MEANING OF THE ESPIONAGE ACT, SO U S C -
IT MAY NOT BE REPRODUCED IN WHOLE OR IN PART, BY OTHER THAN UNITED STATES AIR FORCE AGENCIES, EXCLPT DY PERMISSION OF THE DIRECTOR OF
INTFLLIGENCE, USAF. UNCLA IFEL
AAATO- orvice

300°
-
.*
ifiiiLiLl
.
*
L
/ .
2 .
1
/ 1
1 E
1 1
1 1
1 1 !
.
1
/ 1 1
1
1 1
1
1 1
1
1 1
180 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10
240 230 220 210 200 1$0 170
1
1
1 10
1 1
I
1 20-
1 1
1 .
1 - 1
! .
! .
1 40-
1
1
1 ! 50-
1

.
Captain, USAF
. ATLO
.
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NOTE: THIS DOCUMENT CONTAINS INFORMATION AFFECTING THE NATIONAL DEFENSE OF THE UNITED STATES WITHIN THE MEANING OF THE ESPIONAGE ACT, SO U S. C.-
3I 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.
18-56570-1 *
7

40
, 30
20
.
I0 I
60 50 20 10
10 20 30 40 50 60 80 90 100 11O
n 10-
20-
2O
30-
90-
.
100-
210° 150°
HORIZONTAL COVE DIAGRAM
ANGE (CPS-1) SCALE: 1500,000
FIED
52

50
40
a . 30
20
10
11O 100 60 30
I0 20 30 40 50 60 0
10
20-
. 30
.
100-
210° "10- 150°
HORIZONTAL COVERAGE DIAGRAM
LEGEND
MAX. SEA VGE PS-D FEET SCAL
INCLOSURE *2
FEAF Sd

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1 1
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il
4
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.
-
240°
.
.
.
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1
1 8
210°
MAXIMUM SEARCH RANGE (CPS-I)- 3O,00( FEET
.
THAN PICKUP (CPS-I)
----- LESS T
INCLOSURE*6
#t IR-25-52
USAF 112

+
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120
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.
: 140-
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I0° 240-
,OOO FEET I ;
250-
HORIZONTAL COVERAGE DIAGRAM
ONCLA
1

-
.
120°
—
;
SCALE: 1:500,000
F
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1
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1 1
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1 1
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80 1701 180 1$0 200 210 220 230 240
1 1
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1 1
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1
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30
20
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10
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10-
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30
40
50-
60

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300° /
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T
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m .
240°
210°
LEGEND /
MAXIMUM SEARCH RANGE (CPS-1)-20,000 FEET
-- - LESS THAN 33% PICKUP (CPS-I)
LESS THAN 66% PICKUP (CPS-I)
INCLOSURE: #5
FEAF 112 #IR-25-52

60 1 1
i 1
1 1
50 T I
. . I 1
1
40 . 1 1
6 . 1
4
1 1 /
30 .1
I I
1 1
20 1
1
. 1 1 1
10
I 1
. 1
I0 20 30 50 60 70 120 130 140 150 160 1701 180 190 200 210 220 230 240
1
1
1
. 1 1
a 1
1
1 /
. 1
1 1
. 1
1 /
1
1 1

70
80
T 901.
1 .
100
10 1
120
130
140
190
200
210
210° 220
/
DOO FEET 1 HORIZONTAL COVERAGE DIAGRA
1
.
UNCLASSIFIED

X
120
. SCALE: 1: 500,000

1
1
.
. ;
-
.
1
x-x 1
1
- 1
x 1
90
80 90 100 110 120 140 150 160 1 70 180 190 200 210 220
x
1 1
×
2 1 1
1
/ .
1
/
/

80 a
s0
40
50
+
70
-

300°
.
5
. /
1
. /
/
. .
. /
. . …. +
1 1
1 A
,
1 I
1 -x :
I
1

2100
LEGEND HORIZONTAL
—MAXIMUM SEARCH RANGE (CPS-I)-10,0 FEET
INCLOSURE #4
FEAF 112 # IR-25-52
13258-1

1 . 700
- 80°
-
90°
210°
ND HORIZONTAL COVERAGE DIAGRAM
SEARCH RANGE (CPS FEET ,180°
1
4 UNCLASSIFIES
25-52
-

00 .
T
120°

4 T -70°
-60°
. -50°
1 T 40°
- .
80°
90°
1
100° .

UNCL
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.
:
. . ;
3
= :
-
- 330°
1
4
--

.
.
a 1

40
30
20
.
10
0 20
90°
10 20 30 40 50 120 130 140
10
20
30
40
50
180°
ZONTAL COVERAGE DIAGRAM
.
SCALE: 1500,000
UNCLASS