ALOS-2 L1.5 product digital number in the PALSAR-2 JAXA standard product is converted to backscattering coefficient (sigma naught in dB) using the following equation:
The input is an ingested ALOS-2 PALSAR L1.5 product, see details here.
The output is a STAC item geojson including the assets of product image files of each polarization in COG format.
[RD03] - M. Shimada, O. Isoguchi, T. Tadono and K. Isono, "PALSAR Radiometric and Geometric Calibration," in IEEE Transactions on Geoscience and Remote Sensing, vol. 47, no. 12, pp. 3915-3932, Dec. 2009, doi: 10.1109/TGRS.2009.2023909.