Gamma MSP: Reference Manual

RSAT_lks

ANSI-C program: RSAT_lks.c

NAME
RSAT_lks - Generates multi-look intensity image from complex SAR SLC image for Radarsat Standard Beam StripMap mode following the algorithm as specified by RSI specifications

SYNOPSIS
RSAT_lks <SLC_PROC_param> <MLI_PROC_param> <SLC_image> <ML_image>

EXAMPLE
RSAT_lks pBogota.slc.par pBogota.mli.par Bogota.slc Bogota.mli

DESCRIPTION
This program is used to take looks in in the azimuth frequency domain rather than the spatial domain as is usually done. This program meets RSI specs for multilook images from Standard beams. Each of the 4 looks has a bandwidth of 293 Hz with a 39 percent overlap with adjacent looks. Each look is weighted with a Kaiser-Bessel window function with window generation parameter of 2.9. The SLC data are read in blocks of 2048 lines. These data are Fourier transformed in azimuth, filtered and then inverse transformed. The individual looks are then detected and summed with the other looks for that block and written out to disk. There is an overlap between the blocks to account for the finite length of the impulse response of the bandpass filters used to generate the looks. The update of the processing parameter files is identical to multi_SLC.

The complex input data may be displayed using disSLC, the (real) output multi-look image using dispwr. Alternately, the intensity image can be scaled and stored as a SUN raster file or BMP format image using raspwr.

SEE ALSO
Users Guide, multi_SLC, typedef_MSP.h, MSP Processing Parameter File, dispwr, raspwr.