Operational use of improved profiles by using neural network technique derived from NOAA satellites microwave data in NWP model over Indian region

India Meteorological Department, New Delhi receives and process NOAA TOVS ATOVS data in real time. The physical neural network approaches have been used to retrieve atmospheric temperature moisture profiles from NOAA-16 & 17 satellites AMSU over Indian region. earlier training set based on global only for two seasons technique has replaced by new regional land ocean all the seasons. improved accuracy retrieved using approach compared method. detail validation inter comparisons of also carried out with ECMWF analysis sea separately different year 2002-2003. performance is found be superior method.
 Recently, region NWP model impact study. operational system Department a Limited Area Analysis Forecasting System (LAFS), which consists time processing received Global Telecommunication (GTS), objective 3-D multivariate optimum interpolation (OI) scheme multi-layer primitive equation model. Several experiments were performed data. Using this several undertaken examine these sets some important weather systems such as monsoon depression, active conditions during 2003. preliminary studies reveal that additional positive rainfall prediction limited area Results specific cases are presented paper.