Doppler Weather Radar Current Affairs - 2020

IMD hands over Kochi Cyclone Detection Radar (CDR) building to Indian Navy

India Meteorological Department (IMD) has handed over its Kochi Cyclone Detection Radar (CDR) building to Indian Navy. In this regard, Memorandum of Understanding (MoU) was signed between Indian Navy (IN) and IMD. The MoU will enable Indian Navy to utilise CDR building within naval premises at Kochi for meteorological purposes.

Kochi Cyclone Detection Radar (CDR) building

It was constructed during period 1983–86 inside Naval Base. It has S-band Cyclone Detection Radar installed by Bharat Electronics Limited (BEL). The facility was operated by IMD from 1987-2017 to provide weather support for civil aviation at old Kochi Airport – presently Naval Air Station INS Garuda.

In 2017, IMD commenced operating new Doppler Weather Radar (DWR) at Mundamveli, Kochi as S-band radar had become obsolete. Since then it was lying vacant and unused. Based on request by Indian Navy, IMD has agreed to hand over building permanently for meteorological purposes.

The building now will be utilised by Indian Naval Meteorological Analysis Centre (INMAC), an operational unit of Indian Navy set up in 2013 with mandate to provide daily meteorological information/ forecasts to users across Indian Navy such as ships and establishments.

Indigenously developed S-band Doppler Weather Radar commissioned in Kochi  

A state-of-the-art, indigenously developed S-band doppler weather radar (DWR) of India Meteorological Department (IMD) was commissioned at Palluruthy in West Kochi, Kerala.

It has been manufactured by Bharat Electronics Limited (BEL) based on the indigenous technology provided by ISRO. It joins the latest in a chain of 27 such advanced radars already installed in various parts of the country.

The S-band DWR is capable of predicting weather events such as storms and cyclones, other severe weather conditions occurring in 500-km radius from Kochi with increased accuracy.

Doppler weather radar

Doppler weather radar is an observational tool for monitoring and predicting severe weather events such as hailstorms, thunder storms, cyclones and tornados. It uses the Doppler effect by bouncing a microwave signal off a desired target to produce velocity data. This data helps in analyzing object’s motion by altered the frequency of the returned signal. It mainly gives information about wind velocity and also about precipitation. 

DWR can provide area specific rain and storm warnings which are beneficial for disaster management and emergency response, aviation and related services. It can be used for wind speed measurements during cyclones and thunderstorms which is not possible in conventional weather radar. Thus, it helps in providing improved warning and better weather forecasts.

Doppler effect: It is an increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move towards (or away from) each other.