FIXED COMMUNICATIONS STATIONS, NORTH VIETNAM
Document Type:
Collection:
Document Number (FOIA) /ESDN (CREST):
CIA-RDP78T05161A000100010049-5
Release Decision:
RIPPUB
Original Classification:
T
Document Page Count:
15
Document Creation Date:
December 28, 2016
Document Release Date:
April 7, 2003
Sequence Number:
49
Case Number:
Publication Date:
November 1, 1964
Content Type:
IR
File:
Attachment | Size |
---|---|
![]() | 1.56 MB |
Body:
Approved For Release 2T/p /1ttekP78T05161A000100010049-5
November 1964 Copy
CIA/PIR-35/64
CENTRAL INTELLIGENCE AGENCY
PHOTOGRAPHIC INTELLIGENCE REPORT
NORTH VIETNAM
FIXED COMMUNICATIONS STATIONS,
DECLASS REVIEW by NIMA/DOD
TOP SECRET
Approved For Release 200.3/U5114: Cl - 8TO5161A000100010049-5
GROUP I
E.cI ded f.om a~romarc
25X1 Approved For Release 2003/05/14: CIA-RDP78TO5161A000100010049-5
Approved For Release 2003/05/14: CIA-RDP78TO5161A000100010049-5
*p'p
oved For Release 1093/i
FIXED COMMUNICATIONS STATIONS,
NORTH VIETNAM
25
25
25
25
Approved For Release f ?Q ,j0~tt kff PP78T05161A000100010049-5
25
1
1
Approved For Release T2 0 C R T P78T0516 A000100010049-5
F _j
CIA/PIR-35/64
A search of photography of North Vietnam
covering the period from
0 has revealed the presence of one
large point-to-point transmitting` station, one
large international receiving station, one large
international broadcasting station, and 3 small
point-to-point communications stations (Figure
1). This report locates and describes these
stations, and furnishes pertinent mensural and
technical data for each.
1
02? 10
4? 10
6? 108?
C H I N A
l
La
K
ay
o
Lai Chau
22?
Broadcas
ing Mon Cay Station
D
ien Bien Phu (p
Station ` Dien Bien Phu
Statio
cp
Receiving Station ?
io
Transmitting
Station
:
?.
20?
L A 0 S
Thanh Hoa
NORTH
GULF
OF
VIETNAM
TONKIN
Vinh
Z
18?
F_
Dong Hoi Station
THAILAND
Dong
oi OEMARCATIO
LINE
Railroad
Road
1l
?-- S
UTH
50 100
VI
TNAM
NAUTICAL MILES
FIGURE 1. LOCATION MAP.
-1-
Approved For Release.Q?,/0r1DP78TO5161A000100010049-5
Approved For ReleT@ RO(i ,1K-j A-RDP78T0
CIA/PIR-35/64
HANOI POINT-TO-POINT
TRANSMITTING STATION 105-46E. Two separate walled areas at the
A large point-to-point high-frequency (HF) station are a control area and a support area.
transmitting station (Figures 2 and 3) is situated The control area contains a transmitter build-
approximately 5.7 nautical miles (nm) south- ing, 2 cooling ponds, and 7 other buildings.
Approved For Release 00 /~5(4 f 61A0001000100
25
1
Approved For Releasel?P066R TF DP78T051614000100010049-5
CIA/PIR-35/64
_W_
SUPPORT AREA
. Stick mast
O Rhombic antenna
--- Dissipation line
Road
-w- Wall
-?- Power line
? Guard tower
Drawn from oblique photography: scale varies
N
I
The support area contains approximately 13 antenna, 2 medium-sized single rhombic an-
administration and housing-type buildings. Sur- tennas arranged as a pair, 2 medium-sized
rounding these areas are 2 large and 2 small single rhombic antennas, and approximately 27
double rhombic antennas arranged as pairs scattered stick masts. Pertinent mensural and
for day-night operations, one double rhombic technical data are given in Table 1 .
Approved For Release12 0 /f DP78T05161 000100010
25
25
25
25
25
25
25
Approved For ReleT@ PO 1 TC A-RDP78T 5161A000100010049-5
I ?E_~
CIA/PIR-35/64
Yards at 21-03N 105-41E. The absence of
cooling ponds and the presence of the large
Hanoi point-to-point transmitting station indi-
A large point-to-point receiving station cate that this is most probably a receiving
(Figures 4 and 5) is situated approximately 8.6 station. It has a walled area that contains a
nm west-northwest of the Hanoi Marshaling control building and approximately 17 other
Approved For Release 2003/05/14: Cl -RDP78T05161A000100010049-5
TOP SECRET
Approved For ReleaseT2?P0!S{- REC DP78T0516 A000100010049-5
CIA,/PIR-35/64
1
? Stick mast
Q Rhombic antenna
Road
-W- Wall
-? - Powerline
Guard tower
housing and related buildings. Antennas are and 4 single rhombics. The antennas are dis-
arranged in a roughly circular pattern surround- persed for diversity reception. In addition,
ing the walled area, and include 3 large and 3 there are at least 14 stick masts scattered
small double rhombics arranged in pairs for throughout the area. Pertinent mensural and
day-night operations, 2 other double rhombics, technical data are given in Table 2.
Approved For Release,2J~iQ~,(05/Jq.;,rJA- -78-051 A00010001
r- 7=
25
25
25
25
25
25
25
Approved For ReleTo P0(~iK/W.JC A-RD
P78T0
CIA/PIR-35/64
HANOI-ME TRI INTERNATIONAL
BROADCASTING STATION 105-47E. The station contains two large
A large HF radio station (Figures 6 self-supporting lattice towers, each with a
and 7), used for international broadcasting, 55-foot crossboom on top, supporting the
is situated approximately 4.3 nm southwest director-reflector curtains of a horizontal cur-
Approved For Release 2003/05/14 : - lA0001000100
TOP SECRET
F__ I
f
25X1
25X1
TOP
A0
droved For Release 20
CIA/PIR-35/64
Stick mast
Rhombic antenna
Dissipation line
Road
Fence
Power l ine
Ditch
Concrete slab
Guard tower
TRANSMITTER
ISO
1
s,,
00
I
25X1
25X1
tain array. The station also contains 3 large scattered throughout the antenna area. Support
and 3 small double rhombic antennas arranged facilities located within a large fenced area in-
as pairs for day-night operations. Pertinent clude a transmitter building, a cooling pond,
mensural and technical data are given in Table 3. and 8 other buildings; over 20 other buildings
In addition, approximately 10 stick masts are are in an adjacent, partially fenced area.
-7-
TOP SECRET
F- I
Approved For Release 2003/05/14: CIA-RDP78T05161A000100010049-5
COOLING
POND
25X1
25X1
Approved For ReI F05t5R4T IA-RDP78T 5161A000100010049-5
CIA/PIR-35/64
PROBABLE HORIZONTAL
DIPOLE ANTENNAS
Pole mast
Road
Fence
----- Cable scar
Drown from oblique photography: scale varies
DONG HOI POINT-TO-POINT
COMMUNICATIONS STATION
A small HF point-to-point communications
station (Figure 8) is situated approximately 4 nm
north-northeast of Dong Hoi at 17-32N 106-35E.
The station consists of a fenced area, 6 control/
support buildings, and, immediately north-north-
west, 4 pole masts that probably support two hor-
izontal dipole antennas. Each probable antenna
has a 145-foot mast separation and is oriented
on an azimuth of A fenced area
of unidentified activity is approximately 3,500
feet to the east-northeast and is connected to
the station by road and by cable scar.
DIEN BIEN PHU POINT-TO-POINT
COMMUNICATIONS STATION
A small point-to-point communications sta-
tion (not illustrated) is situated approximately
3.3 nm south-southwest of Dien Bien Phu Air-
field at 21-22N 103-OOE. This station has the
same general layout and size and almost iden-
tical components as the Dong Hoi station, and
for this reason is not covered in greater detail.
The two probable antennas are oriented on an
MON CAY POINT-TO-POINT
COMMUNICATIONS STATION
A small point-to-point communications sta-
tion (not illustrated) is situated approximately
one nm southeast of the center of Mon Cay at
21-32N 107-59E. The general layout, size,
and components are essentially the same as at
the Dong Hoi station. The two probable antennas
are oriented on an azimuth of
161A0001000100
Approved For Rele sOZ00 /9VE.l - REWMFT
roved For ReleaseT2090 K. R TR P78T051 lA000100010049-5
-1 1
CIA/PIR-35/64
1
I
7
5? 9
0? 10
5? 12
0?
,~
L BAIKAL
\
Karaganda
MONG
OLIA
~AR
A
L BALKHASN
Q
5
,
, -
a
Alma-At
~
S?
J
1
Peiping
.'
ninon
RE
C H I
A
~K
?
~
SHM1R ~
,(In
AFGHANISTAN ~"
1
Dispute)
1
O
`
'
, I
t
rte
l~
'
EAST
PAKISTAN
`~NewD
NEPAL\
Ihii ??
r
A cO
C H I EA
SEA
~ u
'~? ;tom.
71N
I
Okinawa
I
NDIA ~A
ISN.
R~~~y
BURMA
MACAO oNc
TAIWAN
r?' LAOS
ANO KONG
BO
bay A
Y
` L??f?.
Hainan
?. ETNAM
O F
8 E N G
`
THAILAND
A L
ari?n
emO
I;- O U T H
7
?
5
ANDAMAN
IS ,.1. 7AMB
[ C H I N A
? ? PHILIPPINES
LACCADIVE IS
5 E A
DEYLON
NICOBA
IS
MALDIVE IS
BRUNEI
A L
?Y S I/Af
'-
o
Borne
.
tra
C
AGOS
D
I N D O
I ''$ S I A
ARC
IPELAGO
ja
,
Java pL-'.^i?.c
Christmas
? P
projection in order to illustrate their general
The azimuths of the antennas at the three orientation (Figure 9); because of the numerous
Hanoi area stations, as listed in the pertinent technical limitations involved, these projections
tables, have been plotted on their great-circle should be considered only as approximations.
Approved For Releasefdp0S/lq;, 1A000100010
25
25
25
25
25
25
25
Approved For Rele' j R0(9N TC
Major
Axis
CIA/PIR-35/64
Major
Axis
Tilt
Angle**
(0 1)
Azimuth
(1)
1 Single 605 290
rhombic
2 Single
rhombic 600 290
70 75
Bombay, India
3 Double
rhombic 610 295
85 100
New Delhi, India
4 Double
rhombic 730 345
100 115
Alma-Ata, USSR
5 Double
rhombic 435 210
65 120
Alma-Ata, USSR
6 Double
rhombic 850 405
110 135
Alma-Ata, USSR
7 Double
rhombic 490 235
80 110
Alma-Ata, USSR
8 Single
rhombic 540 340
80 90
Karaganda, USSR
9 Single
rhombic 540 340
70 85
Karaganda, USSR
obliquity of photography
*All measurements are very approximate because of extreme difficulty in locating exact position of masts and
Antenna
Length (ft)
Mast Height (ft)
Tilt
th
A
i
Major
Minor
One
Major
Minor
Angle**
z
mu
(,)
General Orientation
No
Type
Axis
Axis
Side**
Axis
Axis
(? ~l
Double
rhombic 435
Minor
Axis
One
Side**
rhombic 730 343
3 Single
rhombic 600 295
4 Double
rhombic 615 305
5 Double
rhombic 425 200
6 Double
rhombic 730 360
7 Double
rhombic 610 285
8 Double
rhombic .490 235
9 Double
rhombic 850 400
10 Single
rhombic 600 290
11 Single
rhombic 610 295
12 Single
rhombic 600 290
Minor
Axis
IA-RDP78TO4
*All measurements are very approximate because of extreme difficulty in
obliquity of photography
**Computed measurement
***Measurement precluded by photographic limitations
Alma-Ata, USSR
Alma-Ata, USSR
Bombay, India
New Delhi, India
Alma-Ata, USSR
Alma-Ata, USSR
New Delhi, India
Alma-Ata, USSR
Alma-Ata, USSR
New Delhi, India
Djakarta, Indonesia
Peiping, China
Approved For Release 2003/05/14: CIA 161A0001000100
TOP SECRET
r
CIA/PIR-35/64
1
roved For Release 16W0
-7
Minor
Axis
Major
Axis
Length (ft)
Curtain array
Double rhombic
Double rhombic
Double rhombic
Double rhombic
Double rhombic
Double rhombic
480
330
415
300
360
520
One
Side**
Tilt
Angle**
(o ')
I
Azimuth
(O)
Tower separation: 415 eet, tower height:
240
175
240
190
210
250
*All measurements are very approximate because of extreme difficulty in locating exact position of masts and
obliquity of photography
**Computed measurement
Hanoi Area Stations
CNO. US Air Target Chart, Series 200, Sheet 0616-19A, 1st ed, Jul 59, scale 1:200,000 (SECRET)
Dong Hoi
DIA. US Air Target Chart, Series 200, Sheet 0617-19HL, 2d ed, Jan 64, scale 1:200,000 (SECRET)
Dien Bien Phu
DIA. US Air Target Chart, Series 200, Sheet 0616-17HL, 2d ed, Sep 63, scale 1:200,000 (SECRET)
Mon Cay
USAF. US Air Target Chart, Series 200, Sheet S0615-16A, 1st ed, Jul 59, scale 1:200,000 (SECRET)
REQUIREMENT
CIA. C-DI-4-81,221
PROJECT
C-1253/64
Approved For Release '0 ' 4- k fDP78TO51
Alma-Ata Area, USSR
Alma-Ata Area, USSR
Peiping, China
Peiping, China
25
25
25
25
25
25
25
25
25
Approved For Release 2003/05/14: CIA-RDP78T05161A000100010049-5
TOP SECRET
TOP SECRET
Approved For Release 200 CIA-RD 78T05161A000100010049-5
f