The first output is the simulated radar image in slant range created by the topo data. The second optional output is a topo locator map to the simulated radar image.
This specifies a reference image that must be the same size as the input image. Typically this image will be a low resolution version of the input image. (Implemented to facilitate MAGELLAN processing modeling)
This specifies a file in VICAR parameter file format that specifies
updates to the command line parameters that were entered. If there are
less than two (2) lines the presence of the file is ignored.
This can be used to model a SAR orbiting spacecraft when the orbit is
significantly different from circular or if the elevation angle (incidence
angle (ILLUM_VECTOR)) changes during the course of the image being
processed for simulation.
This file may contain the following parameters:
SS, NS, AZ, EL, HEIGHT, TOP, SSCALE, LSCALE, ZSCALE, SCALE, TOFF
Any or all of these may be specified. The total NL will be equally partioned
between each specified set of parameters.
EL specifies the real elevation, in degrees, of the radar source measured from the vertical perpendicular to the image plane. (If the satellite were directly overhead, EL would equal 0.0 degrees.)
TOP is used to compute the scale if the SCALE parameter is not entered. When used, the scale is 16383.0/TOP for halfword output and 254.0/TOP for byte output. The default is 30.
HEIGHT is the altitude of the satellite in real kilometres.
SSCALE is the (real) scale in meters/pixel of the terrain image in the sample direction.
LSCALE is the (real) line scale in meters/ pixel in the terrain image.
ZSCALE is the altitude scale in the terrain image in real meters/dn.
The dn scale (real) in the radar image. If SCALE is not entered, the value specified with the TOP parameter (or its default) is used.
The (real) terrain offset; if not specified, the program will calculate this for you.
This keyword controls whether RADAGEN will remap the output pixels into the projection provided in the input image. Default is NORECTIFY. See also HELP REF.
Currently this project specific processing selection flag is only valid for MAGELLAN. If MAGELLAN is specified, the backscatter model computed for Venus and cited in PS202- : will be used in place of the default model described in the general HELP for RADAGEN.