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Digital Cyclone Warning Dissemination    System-Transmitter-Indoor Equipment

Receiving Antenna at Field Station



Weather Communication

           One of the fast developing sectors all over the world is communication technique, which is making the world smaller and smaller, but at the same time, costwise, within the reach of common man. IMD is  maintaining  the pace of fast changeovers in the field of communication.

             Cyclone Warning Dissemination System is one such fast changing mode of  weather communications.

         It is a direct satellite reception system with selective addressing facility installed in cyclone prone areas. It was started initially, during 1984-85,


DCWDS Receiver at Field Station

Cyclone Warning Dissemination System

         This is a direct broadcast of cyclone warning in regional languages to the likely affected areas. There are 252 stations along Indian coast which are equipped to receive the weather related warning.

        India Meteorological Department’s Area Cyclone Warning Centers (ACWCs) at Chennai, Mumbai and Calcutta are responsible for originating the warnings and transmit the weather warning messages  through CWDS.

         This service is first of its kind to be used as  the recipients can be selectively addressed through special CWDS receivers and area-specific messages can be sent to the end users who are likely to be affected by adverse weather.

         The CWDS receivers are kept under standby mode and will be get automatically activated on receipt of the weather warnings messages.

        Even when, all the other means of communication fails, the CWDS keeps on working with battery back up power  via  INSAT satellite.

 Salient features of CWDS:

A unique communication device first of its kind to be used for weather warning.

•It has Sat. receiver with selective addressing system installed at remote cyclone prone area.

•252 stations are installed in Coastal Areas of Tamil Nadu and Andhra Pradesh coast, Gujarat, Orissa, West Bengal and other monitoring stations.

•101 receivers using latest digital techniques with message acknowledgement facility were added in Andhra Pradesh.

•Warnings are transmitted in local Regional languages.

•Systems are designed to work with  backup batteries for about three days, in case of power failure due to cyclone.





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