Atmospheric Observational Networks



Details of the augmentation of atmospheric observation network under Modernization of IMD Phase-I (Table-I), is continuing. Five DWRs have been commissioned, each at Hyderabad, New Delhi, Nagpur, Patna and Mumbai, and products are regularly available to the users on Web. The Delhi DWR has also been demonstratively used for building now-casting system in support of the Common Wealth Games (CWG 10) through generating site specific weather forecasts on hourly scale. The GPS sonde has improved the quality of upper air observations over India. At the same time, a new variant of indigenously developed upper air sounding system based on GPS has been successfully tested by IMD. Action is underway to produce the same for operational induction in a limited scale facilitating for robust performance evaluation.

Status of Atmospheric Observation Network.

Sensor Target Up to July 2011 Existing prior to modernization Total Data receipt
AWS 550 411 125 522 503
ARG 1350 364 - 364 314
GPS-S 10 10 1 11 11
DWR 13 2 5 7 7
Pilot Balloon 70 65 - - 65

An instrumented air-craft was chartered during monsoon period to conduct cloud aerosol-interaction experiment during 2009-11. A Web-interfaced National Satellite Data Centre was established for archiving all satellite data available till date and serving near real time value added products. The new satellite INSAT 3D is to be launched in the near future. The ground segment required to process its data has already been established and is being currently tested for the existing Indian satellites, Kalpana-1/INSAT-3A. The new system will substantially augment Indian capability to foreshadow high impact weather occurrences.

Satellite product broadcast services were upgraded with Digital Meteorological Data Dissemination (DMDD) systems being installed at 37 locations in India and neighbouring SAARC countries of Nepal, Male and Sri Lanka. 353 coastal Digital Cyclone Warning Disssemination Stations (DCWDS) continued to operate with the support of fail-safe satellite communication. Its migration to DTH mode has already been prototyped for deployment.

A significant development was a bilateral agreement between EUMETSAT and IMD to receive data of all European satellites. Other areas of development during this period included Integrated Precipitable Water Vapour using GPS satellites data and installation of data receiving systems from NOAA/MODIS/Metop polar orbiting satellites.

Last Updated On 04/09/2015 - 14:13
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