ISRO and NASA are working together on the development of Dual Frequency L and S band Synthetic Aperture Radar (SAR) imaging satellite called NISAR.
The L band SAR will be developed by Jet Propulsion Laboratory (JPL) of NASA and S band SAR frequency will be developed by ISRO.
This helps scientist’s better understanding on climate change and aid future resource and hazard management.
L band has the operating frequency range of 1–2 GHz in the radio spectrum and the wavelength range is 30–15 cm. It has low bandwidth due to its low frequency. L band used in low earth orbit satellites, military satellites, mobile communication, also in GPS .