INSAT 3D/3DR derived wind indices analysis over India for weather forecasting

Abstract

Changing climate is global concern now-a-days and many organizations are working together to discuss, analyze and interpret the information in more meaningful way. The conventional information is limited and data sparse regions are mainly depending on the remote sensing (satellite or radar) observations. This remote sensing information’s are associated with errors and needs to validate. In this present study IR sounder data Wind Index onboard on INSAT-3DR satellite has been validated with in- situ ground-based Radiosonde data. It is found that the results are agrees fairly well with negative bias of satellite data. Further this analysis is found to be very useful in diagnosing the thunderstorm or dust storm events in more meaningful way at the time of wind gusts etc. Therefore, satellite derived WINDEX is very useful in aviation forecasting especially for short duration or helicopter operations. The WINDEX data retrieved from clear sky pixels of INSAT-3DR sounder data have been utilized in recent Delhi NCR thunder squall case (30th May -2022) and WINDEX values shows >45 KT at least 3-4 hour hours prior.