Study of intense rainfall events over India using Kalpana-IR and TRMM-precipitation radar observations.

摘要

An attempt has been made here to analyse the infrared (IR) radiances from Kalpana/INSAT data along with the high resolution rainfall estimates from Precipitation Radar onboard Tropical Rainfall Measuring Mission (TRMM) satellite. Contrary to the IR, microwave rain (MW) rates are based on measurements that sense precipitation in clouds and do not rely on cloud top temperature. The combination of the broad coverage and frequent refresh of the geostationary satellites with the sparse but more accurate active MW rain rates has been used for the characterization of precipitation-bearing systems over Indian land from adjoining oceans. These studies are taken up to enhance the capability of rainfall retrievals in the near future using synergy from both INSAT-3D and Megha-Tropiques, IR and MW measurements respectively. The intercomparison with TRMM-3B42 and the validations with the rain-gauges and Doppler Weather Radar shows that the present technique is able to retrieve the rainfall with reasonable good accuracy.