RADIO FACILITIES NEAR KUN-MING, CHINA

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78T05439A000200320004-4
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 6
• Document Creation Date: December 28, 2016
• Document Release Date: October 17, 2003
• Sequence Number: 4
• Content Type: REPORT

Approved For Release 2003/12/09 : CIA-RDP78TO5439A000200320004-4
ILLEGIB
Approved For Release 2003/12/09 : CIA-RDP78TO5439A000200320004-4
 DECLASSIFICATION REVIEW by NIMA/
25X1
munication station, and a TH
The radio broadcast statio:
29E), about 15.5 rim southwes
is a medium- to high-frequenc,
omnidirectional vertical radiat
Each curtain array consis
curtain backed by a passive cur
from pole frame towers or
towers. There are 10 groups
towers and 5 groups of self-sup
posed of three support areas
of curtain antenna arrays, two
tical radiators, a horizontal
.1 '
I N D I A
i NAUTICAL MILES
00 0 100 200
CILITIES NEAR KUN-MING, CHINA
SY 7 7
141-AC/R-1227/63
a radio com- arranged according to height, spacing, and sim-
i (24-53N 102
of Kun-ming,
r facility corn-
serving groups
irectional ver-
ipole, and an
r (Figure 2).
s of an active
ain, suspended
;elf-supporting
of pole. frame
ilarity of construction (Figure 2,. Items Ca
through Co). The directional vertical radiators
(Figure 2, Items DVa and DVb are guyed
towers backed by parallel rows of towers which
act as passive reflectors; antenna DVa also.
has buried ground radials. Th horizontal
dipole (Figure 2, Item HD) isI suspended
between guyed towers, and the omnidirectional
vertical radiator (Figure 2, Item O,) isa self-
supporting tower. Dimensions andd operational
characteristics of the antennas are' given in
Table 1.
Each support area contains a transmitter
building, various other electronic adilities or
housing and maintenance buildings, and one or
two cooling ponds. Underground tansmission
lines connect the transmitter buildings with
the antennas, but epecific connections between
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Chungking
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Kuei-yangi
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25
 KEY TO ANNOTATED ITEMS
1
TRANSMITTER BLDG
6.
TRANSMITTER BLDG
2.
TRANSFORMER YARD
7.
COOLING POND
3.
DIESEL/ELECTRIC
8.
GENERATOR B DG
GENERATOR BLDG
9.
TRANSMITTER BLDG
4.
COOLING POND
IO.
COOLING POND
5.
WATER TOWER
 DIRECTION FINDING
STATION
ROAD
FENCE
TRANSMISSION LINE
ESCARPMENT
FIGURE 3. RADIO
The transmitter building in
and serves antennas DVa,
The area also has a diesel-
building, 25 by 25 feet; a t
75 by 50 feet; a cooling poi
and a water tower of undetern
Support Area B, the larger
has a transmitter building (I
which measures 155 by 55
to serve antennas Ca thro
facilities in the area include a
ing, 50 by 30 feet; two coc
50 by 20 feet; and numer
maintenance buildings. The t
ing in Support Area C (Fi
measures 120 by 40 feet and e
antennas OV and Ch througl
pond in the area is 20 by
LKUN-MING
RADIO COMMUNICATION
STATION
KEY TO ANNOTATED ITEMS
1. TRANSMITTER BLDG
5. 3 DUPLEX
HOUSING
2. ADMIN BLDG
BLOGS
3. MESS & RECREATION
6. HOUSING &
BLDG
MAINTEN
ANCE
4. 2 MULTI-UNIT HOUSING
7. MAIN ADM[
BLDG
B LD GS
o
B. IO STORAG
E BLDGS
R1 Rk
Support Area A
3 100 by 85 feet
Vb, HD, and Co.
lectric generator
-ansformer yard,
id, 50 by 20 feet;
lined dimensions.
at the station,
igure`~t2, Item 6)
feet and appears
gh Cg. Other
generator build-
us housing and
ansmitter build-
gure 2, Item I-))
pparently serves
cooling
25X1 D
102-48E), about 8. lS?
statipn (24-5~1\
ming, consists of 14 rhombic antenn s, a trans-
mitter building measuring 180 by ~O feet, and
numerous support buildings (Fi_gu e 3). The
large number of stora_e and barack s-type
support buildings suggests that, fo Ir logistical
purposes, the station is located at a military
garrison or storage area. The st~tion could
be a point-to-point broadcast- relay facility,
but the long-range rhombic antennas (Table
2), oriented to most points of th4. compass,
and the THICK EIGI-lT direction-find) ink; station
nearby indicate that it has a radio conymunication
function. It is also doubtful that more than
one radio broadcast station could be located
in the Kun-ming area.
RC
?-? 7 S
6 \?
 (24-56N 102-46E), about 1.3
west of the radio communicati
a high-frequency facility assoc
communication station. A typical
. Approximate
"Estimated for curtain arrays based on
wavelength at each end of the antenna
consist of half-wave dipoles and are in
installation (Figure 3), it consists of 8 cage
antennas, each=feet in diameter and= feet
high, arranged in a circle ^ feet in diameter.
The screen grid ground system is 1140 feet
in diameter, and the radial cable ground system
is 420 feet in diameter. Frequency ranges
are estimated variously at 3.5 to 20 and 3.5
avelengths derived from the distance between the towers,'poles, less one I wrier
o account for suspension and insulation. It was assthned that the curtain! arrays
the HF range-