ISRO’s S-Band SAR Payload of NASA-ISRO Synthetic Aperture Radar (NISAR) mission was flagged OFF by Chairman, ISRO / Secretary, DOS on March 4^th 2021 through Virtual Mode. S-Band SAR payload has been shipped from Space Applications Centre, Ahmedabad (SAC/ISRO) to Jet Propulsion Laboratory, Pasadena for integration with L-Band SAR Payload of JPL, NASA. NISAR is a joint collaboration between ISRO and NASA for a dual-frequency L and S-Band Synthetic Aperture Radar for earth observation. NISAR would provide a means of disentangling highly spatial and temporally complex processes ranging from ecosystem disturbances to ice sheet collapses and natural hazards including earthquakes, tsunamis, volcanoes and landslides.