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印度建成新的VLF发信台  

2014-08-08 13:19:06|  分类: 装备介绍 |  标签: |举报 |字号 订阅

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2014年7月31日,印度海军司令RK Dhowan宣布,印度海军一座新的甚低频(VLF)发信台已建成服役。INS Kattaboman发信台位于印度南部的泰米尔纳德邦。1990年10月印度在此建成第一座VLF发信台,代号VTX,发信频率18.2 kHz。新建的VLF发信台是为印度海军核潜艇在远海活动而准备的。

Navy builds state-of-the-art communication stations in Tamil Nadu
Friday, 1 August 20

In a boost to the Indian Navy’s ability to communicate with deployed submarines, the navy has built a new state-of-the-art “Very Low Frequency (VLF)” transmitting station at INS Kattaboman, Tirunelvelli, Tamil Nadu today. According to the Navy, this new facility would provide better platform for communicating with deployed ships and submarines on an uninterrupted basis throughout the year.
India is among a handful of nations in the world to possess such capabilities.
Navy Chief Admiral RK Dhowan inaugurated the facility on Thursday.
VLF radio waves are used for communicating with submarines that are underwater and the Indian Navy has been operating a similar facility for the last 24 years. The new facility incorporates cutting edge technology and will provide the Navy a significantly enhanced reach, redundancy and operational features.
The service already has an elaborate communication infrastructure, including modern satellite communication facilities, to link and network its deployed units with their home bases and command and control centres. The new VLF station will strengthen this infrastructure and provide the Navy additional operational advantages.
The new facility equipment has been constructed by M/s Larsen & Turbo divisions in Chennai and Bengaluru. Interestingly, the facility boasts of the highest masts structures in India, as well as several other unique engineering feats.

印度建成新的VLF发信台 - kktt - 长缨在手  敢缚苍龙
 
2011年5月19日卫片。发信塔分两组,每组6个,环绕中心塔以正六边形排列,两圈半径分别为730米和1200米,内圈塔高276.45米,外圈塔高227.45米。
印度建成新的VLF发信台 - kktt - 长缨在手  敢缚苍龙
 
2014年2月6日卫片。红五星标出两个新建的发信塔,塔高约450米。
印度建成新的VLF发信台 - kktt - 长缨在手  敢缚苍龙
 
VLF Transmitter Grid, INS Kattabomman

VLF Transmitter Grid laid out in the form of a Six pointed star (Star of David), with the Main Transmitter Station (MTS) at the center and transmission towers at the points.
There are 13 Transmission towers totally.

The grid is composed of a central mast and two concentric circles of six masts each. The radius of inner circle is 730 Meters and that of the outer circle is 1200 Meters

Call Sign : VTX
Frequency :
16 KHz (VTX1) / 17 KHz (VTX2) / 18.2 KHz (VTX3) / 19.4 KHz (VTX4)
Locator : MJ88vj

Whereas a submarine on the surface can transmit and receive wireless messages just like a ship can, submerged submarines can only receive wireless messages on Very Low Frequency (VLF). VLF transmitters require huge antennae suspended high above the ground.

The initial discussions were solely with the Russian side, from whom the submarines had been acquired. Inquiries with western manufacturers indicated that better technology might be available from America. Parallel discussions were therefore pursued, both with Russia and with America.

Between 1979 and 1984, modalities were worked out for American company in collaboration with an Indian company to assume responsibility for the detailed design, manufacture, site installation and commissioning of the VLF transmitting station.

During the same period, the Defence Research and Development Organisation designed the antennae to be fitted in the submarine for receiving VLF transmissions.

Installation of the VLF Transmitter commenced in 1987. Trials completed in 1989. On 20 Oct 90, the VLF Transmitting Station was commissioned as INS KATTABOMMAN.
Nearby cities: Tisaiyanvilai, Kanyakumari, Nagercoil
Coordinates:   8°23'13"N   77°45'9"E

Vijayanarayanam Navy Transmitter

At Vijayanarayanam, there is at 8°23'14"N 77°45'6"E the INS Kattabomman facility of the Indian Navy, which is used to transmit orders to submerged submarines on 18.2 kHz under the callsign VTX3. It uses an antenna system consisting of 13 antenna masts. Around a central mast, there are two circles on which are each 6 masts. The mast heights are 276.45 metres and 227.45 metres.


INS Kattabomman

Historical Background

INS Kattabomman was commissioned on 20 Oct 1990 by then President, Shri R Venkataraman. It is named after Veera Pandya Kattabomman, a famous warrior king, who laid down his life in the struggle for freedom from the British Raj. The vast base is rich in flora and fauna with rows of exotic trees and fruits. It is home to deer, hopping hare, peacocks and vast variety of migratory birds from Siberia.
 
Function/ Role
 
INS Kattabomman is the premier communication establishment, located at South Vijayanarayanam, near Tirunelveli in South Tamil Nadu. The primary role of the base is to provide continuous global communication link in the Very Low Frequency (VLF) spectrum to ships and submarines in the country’s areas of interest. The 3000 acre base enclosed in a 22 km perimeter wall hosts the VLF transmitting grid, which is the only one of it’s kind in the country.  The antenna structure consists of 13 high raised cable-stayed steel masts in form of a 6-pointed star. The 301 m centre mast is the third tallest structure in the country, while the other 12 rank amongst the top ten.
 
     INS Kattabomman is a vibrant self-contained base, with officers, sailors and civilians striving to facilitate round the clock naval operations. The base provides facilities such as swimming pool, Tennis and other sports, shopping complex, cinema cum auditorium, post office, children’s parks etc for the over 2000 personnel and families. Extensive courses and extra-curricular activities are conducted within and around the establishment under the aegis of NWWA. The personnel also reach out to the society in Tirunelveli, Kanyakumari and Tuticorin districts through a host of welfare programmes.

印度建成新的VLF发信台 - kktt - 长缨在手  敢缚苍龙
 
印度建成新的VLF发信台 - kktt - 长缨在手  敢缚苍龙
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