INTRODUCTION TO THE KRUG INSTALLATION SERIES

Document Type: 
Document Number (FOIA) /ESDN (CREST): 
CIA-RDP78T04759A001900010018-8
Release Decision: 
RIPPUB
Original Classification: 
T
Document Page Count: 
14
Document Creation Date: 
December 28, 2016
Document Release Date: 
September 25, 2003
Sequence Number: 
18
Case Number: 
Publication Date: 
October 1, 1965
Content Type: 
REPORT
File: 
AttachmentSize
PDF icon CIA-RDP78T04759A001900010018-8.pdf524.62 KB
Body: 
"'q 77 ApprolA F$ . f 2003/12/19: CIA-RD .. , 4 475 018 OCTOBER 196; COPY 11 PAGES INTRODUCTION TO THE KRUG INSTALLATION SERIES DECLASS REVIEW by NIMA/DOD j 44 GROUP I EXCLUDED FROM AUTOMATIC DOWNGPADING AND D ECL ASSIF IC A3ION Approved For ReIey Ogf eM. CIA-RDP78TO4759AO01901010018-8 25X1 Approved For Release 2003/12/19 : CIA-RDP78TO4759AO01900010018-8 Approved For Release 2003/12/19 : CIA-RDP78TO4759AO01900010018-8 Approved For Release 20iOR 2SlbC - INTRODUCTION TO THE KRUG INSTALLATION SERIES NATIONAL PHOTOGRAPHIC INTERPRETATION CENTER 25X1 25X1 Approved For Release 2f&1 /ttRfelf-FDP78T04759A001900010018-8 w 25X1 App oved ForTQleaSk6 YT- > ~i Y" a s 00 y, O i z a 0 a _ W m a o t a .i 1, 0 7 W ? iwu 1 W ..~ :~ O N ? ~ ~ ~EGt1, i ~ - =N C a d 0 ~ z 0. p > t r F I. F z d c~ a ' w a / \1..~ 1 ?`.. a ? z 25X1 Approved For Rg4Upe ff { j 25X1 Approved For 4lease 2&GB 2 R- This report introduces an NPIC series on Soviet-type KRUG high-frequency direction- finding (HF DF) antenna array installations. The series will consist of short but detailed in- dividual reports using a standard format, cover- ing all 31 installations containing KRUG antenna arrays which have been identified by on photography (Fig- ure 1), and all additional KRUG installations identified on future photographic missions. Each report will be based on the best of the latest photographic coverage available. It is proposed that when significant changes are identified on photography, superseding reports will be issued. The standard KRUG IIF DF antenna array (Figures 2 and 3) is composed of several con- centric circles with a building approximately 50 by 35 feet at the center. One of the circles is approximately 390 feet in diameter and con- sists of 40 evenly spaced, cage-type, vertical antenna elements. Each of these antenna ele- ments is 30 feet high Within the circle of cage-type antenna ele- ments is a circular reflector screen. The reflector screen is approximately 350 feet in diameter and is supported by 38 pole masts. All of the sites have a probable ground re- flector ring (not shown on figures) approxi- mately and all but one (Murmansk) are enclosed by a low fence approx- imately 980 feet in diameter. Capabilities of the KRUG Antenna The KRUG array is a versatile antenna system that can be adapted to perform a variety of functions. A partial listing of these reported functions 1/includes: 1. Long-range aid to air navigation 2. Air traffic control 3. Communications intercept, both foreign and domestic 4. lIF communications reception, part cu- larly where high directivity is ne ded 5. Tracking of satellites which carry HF beacons or transmitters 6. Detection of nuclear detonations 7. Detection of missile launches 8. HF propagation forecasting 9. HF propagation research 10. HF ionosphere (over-the-horizon) ra- Frequency....... 2 - 20 mcs Range....... ... 5,000 nautical miles am) Bearing ........ 360 degrees Accuracy ....... 1.0 degree Accuracy of bearings is believed to be .plus or minus one half of a degree at a distani e in excess of 6,000 nm under favorable condit: ins. The KRUG is believed capable of simultanec usly tracking multiple targets transmitting on di* Ye r- ent frequencies in the HF portion of the spec, rum and of "D/F-ing" transmissions as brief t; 50 milliseconds duration. 1/ Each report will include basic data of the installation, set in boxes at the top; a ] rief but comprehensive photographic interprets tion of the installation; and an annotated photog -aph from the referenced mission. Notes on the i0 3ms included in the basic-data boxes are given be ow: Installation Name. Installations wil be carried by Target Data Inventory (TDI or Bombing Encyclopedia (BE) names unless t ese conflict with NPIC usage. Geographic Coordinates. Coordinates Nill be given in degrees, minutes, and second, as plotted by NPIC on the referenced map or ci art, usually the Series 200 US Air Target Cl art. NPIC Target Number and BE Number. ach of these is unique to the installation and ;on- sists of the WAC number plus identifying di its. 25X1 25X1 Approved For Release 20fbp2/ttCWtlRPP78T04759A001900010018-8 roved For a / 1 t "wry 25X1 Approved For 1TPSe0/t2 25X1 25X1 Approved For elease 26 2SG FIGURE 3. DIMENSIONAL DRAWING OF A TYPICAL KRUG INSTALLATION. 25X1 Approved For Release IRYPIVeR 25X1 Appt oved ForT I aSE?&EiT1 Photography. This box contains full photo- graphic references for the coverage on which the report is based. These include mission num- ber, date of pass, pass number, camera desig- nation (where applicable), frame number, index 25X1 number (fo Universal Grid No 1 coordinates, weather, limiting conditions (if any), and classification. AD Area. This box contains a tag identi- fying the air defense (AD) area in which the installation is located. The tag is based on a system devised by NSA which divides the USSR as shown in Figures 4 through 7. The first element of the tag, the letter F, indicates an electronic installation. The second element, also a letter, indicates the air defense district in which the installation is situated, as follows: Letter District M Leningrad K Western LT Moscow P Southwestern Baku W Sverdlovsk N Tashkent Y Northern D Trans-Siberian Far Eastern These districts have in turn been divided into zones as indicated by the first digit in the tag, and further subdivisions are indicated by the second digit. Only a 2-letter country indicator will be used in the box when installations lie outside the USSR. References. This box contains data on the map or chart used for plotting the location of the installation and a citation of this introductory report. Requirement. This box contains the re- quester's requirement number. Descriptive Information. In addition to the item;; covered in the boxes at the head of the report, as much description of the installation as possible wal be given. The subject headings in this section were selected after detailed evaluation of a number of individual facilities to ensure a comprehensive profile of any given facility. These headings will always occur in the same order; when any particular category does not apply to a given situation, it will be omitted. This omission indicates only non- applicability; negative information, such as the absence of security measures or the lack of activity, will be noted when observed. The information that will be included under some of these headings is explained below; the other headings are self-explanatory but are included to indicate their place in the standard order of entries and also to suggest the broad scope of photographic interpretation that will be accomplished for each facility. All measure- ment; must be considered approximate. Location. The distance and direction from the town the installation was named for. Function. Status. Activity. Support Components. The buildings and structures in the immediate vicinity of the operational components will be listed here. Usually they will not be annotated on the photo- graph. Security. Vegetation & Terrain. Support -Facilities. This entry describes a separate support facility other than the support components situated in the immediate vicinity of the operational elements of the installation and already described above. Associated Facilities. Unusual Features. Approved For Re "e~2?Q,I 2f1 25X1 25X1 Approved For BLACK 1 5'f?A elease 23 14 CASPIAN SEA 25X1 25X1 #9:R x-FkDP78T04759A001900010018-8 Air defense district Air defense zone Air defense zone/area Air defense sector Approved For Release 2C ,192 1pc F1DP78T04759A001900010018-8 App I-oved For AbRas &MA 2 Approved For sg pe 12 10 Air defense district Air defense zone Air defense zone/area Air defense sector 25X1 25X1 25X1 Approved For 10o o loo 200 3oo Approved For Release 2 I1 ROt Release 2a&W1 S 'E Pd)T Air defense district Air defense zone Air defense zone/area 25X1 25X1 roved For ikWasUfAb/11 25X1 Approved For Rl1 a eS, ~t /1 25X1 ?p Approved For Fkelease 2019/R2IS CR DP78T04759A001900010018-8 1. North American Air Defense Command, "Possiblo Transportable KRUG Could Improvo Soviet HF-D'F-i bilities Si Inificantlv," VOlMD 11 eekly Intelligence Re ew, 49,"fi4, 4 Dec 64. pp ?-f (SECRET F 0 25X1 25X1 25X1 Approved For ReleaseMP3/g ' E?IP-RDP78T04759A001900010018-8 Approved for ReleasIGP03 &REIIA-RDP78T04759A001900010018-8 i CIA 1 `RDP78TO4759AO01900010018-8 Approved For ReleaselQQ3/ 1e n