A-TYPE FAN SONG RADARS IN NORTH VIETNAM

Document Type:

CREST [1]

Collection:

NGA Records (Formerly NIMA) [2]

Document Number (FOIA) /ESDN (CREST):

CIA-RDP78T04759A008400010108-6

Release Decision:

RIPPUB

Original Classification:

Document Page Count:

Document Creation Date:

December 28, 2016

Document Release Date:

January 16, 2002

Sequence Number:

108

Case Number:

Publication Date:

May 1, 1968

Content Type:

REPORT

File:

Attachment	Size
CIA-RDP78T04759A008400010108-6.pdf [3]	200.4 KB

Body:

ApproW FSECRLle 2002/05/07 : CIA-RDP78TO4759AO08400010108-6 PHOTOGRAPHIC INTERPRETATION MEMORANDUM A-TYPE FAN SONG RADARS IN NORTH VIETNAM T CS-20205/ 68 MAY 1968 COPY 118 4 PAGES Declass Review by NIMA/DOD Approved For Rel 2 Vfjf f : CIA-RDP78TO4759AO0840 Handle Via 'GTK~DP WV4 TCS-20205/68 Talentp(~fved For Release 2002/01+f. k b 7g 759A008400010108-6 Control System Only A-TIDE FAN SONG RADARS IN NORTH VIETNAM Analysis of recent aerial photography reveals three sightings of A-type FAN SONG radars, possibly indicating further Chinese involvement in the North Vietnamese air defense system. These radars are at the Hanoi SAM Site B17A-2 (Figure 1Hanoi SAM Site B36-2, and Hanoi SAM Site A10-2. Prior to the observations in North Vietnam, the A-type SOhG radar had been observed only in China at the Shantan SAM Training Area, Sanyuan SAM Training Area, Wushatala SAM Site A15-2 (Figure 2), Changchou SAM Site AO1-2, Shanpo SAM Site A23-2, Haiyen SAM Site B25-2, and Lanchou SAM Site C25-2. Similar in appearance.to the FAN SONG A radar, the A-type FAN SONG is a Chicom-type of modification, probably to the FAN SONG B radar, which is known to be in both the Chicom and North Vietnamese inventories. The A-type modification consists of an additional dish, approximatel iy n diameter, mounted at the center of the horizontal trough (Figure 3 . I I an unus:iai FAN SONG signal in North Vietnam was inter- cepted by an airborne collection system. The FAN SONG signal was operat- ing in high pulse rate frequency, steady scan, lobe-on-receive only (LCRO) mode. The LOBO mode has tho advantage of denying both tracking beam position information and FM SONG lockon signals to pilots. A U.S. pilot stated in a recent report that he saw a SAM lift off and head for his aircraft and that he had no prio electronic warning. Since geographic coordinates have not been established as to the source of these signals, no firm correlation can be made between the unusual FAN SONG signal and the A-type radar. With the identification of the third A-type FAN SONG radar in a possible deployment pattern may be emerging. Sites with A-type radar are now located within ll rim of Hanoi, generally north, south, and east of the complex. There is no photograph'c evidence of this A-type radar being deployed within the USSR or Communist Bloc countries other than China and North Vietnam. 25X1 D 25X1 D Handle Via Talent-KEYHOLE Approved For Release 2002/D&p7 S EOPR 1W759AO084000101088fitroi System only Approved For Release 2002/05/07 : CIA-RDP78TO4759AO08400010108-6 Approved For Release 2002/05/07 : CIA-RDP78TO4759AO08400010108-6 Nandi%~ ed For Release 2002/Ol~: ~T~I:IC~N'7~T59A008400010108-6 TCS-20205/66 Talent-IIEIJOQL Control System Only 25X1 D Handle Via Talent-KEYHOLE Approved For Release 2002/05'OF! 6j@(1 7 fp9A008400010108-6control System Only Handle Via Approved For ReleMP26f:Cffg7 RU FRDP78T04759A0084000T' fdogiss Talent-KEYHOLE Central System Only A-TXPE FAN SONG FAN SONG B 0 Handle Via Approved For ReleMp2S 2 7 RqRDP78T04759A008400 ys~e?m~nly Approved For Release 2002/05/OT QRASURU4759A008400010108-6 Approved For Release 2002/0519To) lk LC 04759A008400010108-6