The presence of cloud in the satellite image would mask the flood affected area and it is not possible to provide the complete flood scenario. If minimum/partial cloud cover persists in the image, it is possible to delineate flood using spectral models. Therefore microwave SAR data may complement the optical data as an alternative. With the launch of RISAT, the first microwave satellite of ISRO and DMSAR, the dedicated disaster Airborne SAR, which has also got onboard processing, there is a possibility of availability of more microwave data for flood mapping and
monitoring.