Cross Calibration of Resourcesat-2A LISS-3 with Landsat-8 OLI over Niger-2 Pseudo Invariant Calibration Site

In the recent past, it is demonstrated that Pseudo Invariant Calibration Sites (PICS) can be used for absolute and cross calibration, apart from radiometric trending of remote sensing sensors. Majority of the well characterized PICS in the world are present in North Africa and Arabian deserts. Niger-2 is one of the sites located in Africa with high reflectance, spatial homogeneity and temporal stability. In the present work, an exercise was carried out to cross calibrate Resourcesat-2A (R2A) Linear Imaging Self Scanner-3 (LISS-3) bands using coincident Landsat-8 (L8) Operational Land Imager (OLI) imaging over Niger-2 site, and assess the requirement to update calibration coefficients. It is observed that, all the bands except Band-3 (Red band) of R2A LISS-3 have very good agreement with L8. Red band indicates minor correction in the calibration coefficients by about 6% to be on par with L8.