| Create ASAR NRCS Bands | |
This command adds a two new NRCS (Normalised Radar Cross Section) bands to an ENVISAT ASAR product:
nrcs = (proc_data * proc_data / ext_cal_fact) sin(rad(incident_angle)).
nrcs_db = 10 * log10(nrcs) which provides the NRCS in the more common
dB units.
In these expressions proc_data are the ASAR image pixel counts,
ext_cal_fact is a calibration factor taken from the product's metadata
(MAIN_PROCESSING_PARAMS_ADS) and incident_angle is the
tie-point grid providing the incident angle in degrees.
The command is only active, if all information required to compute the NRCS can be retrieved from a selected ASAR product.
For more information on the NRCS try the following links: