ATLAS Bhitarkanika Bhitarkanika Forest Reserve Extraction GEDI Gaussian vertical backscatter (GVB) volume ICESat Indian biogeographic region MODIS NDVI P-band polarimetric interferometric synthetic aperture radar (Pol-InSAR) PolInSAR inversion Sentinel-1 Sentinel-2 UAV biophysical parameters blue carbon carbon stock combined model different altitudes dynamic habitat index field spectroradiometer forest height forest structure forest vertical structure fractional differentiation ground topography in forested terrain hyperspectral data laser intensity laser pointing angle