ANSI-C program: base_est_fft.c
NAME
base_est_fft - estimates perpendicular component of the
interferometric baseline from the interferogram
SYNOPSIS
base_est_fft <interf> <SLC_par>
<OFF_par> <baseline> <nazfft> <r_samp>
<az_line>
| <interf> | multi-look interferogram with range phase |
| <SLC_par> | SLC Parameter File (of reference pass) |
| <OFF_par> | ISP Processing/Offset Parameter File |
| <baseline> | baseline parameter file |
| <nazfft> | size of azimuth FFT (# lines read from file) (default=512) |
| <r_samp> | range pixel offset to center of the FFT window (default=center) |
| <az_line> | line offset from start of the interf. for the FFT window (default=center) |
EXAMPLE
base_est_fft 1352_1610.int 1352.par 1352_1610.off
1352_1610.base 2048
DESCRIPTION
base_est_fft reads a section of a complex interferogram, and then
calculates the two-dimensional FFT to determine the local fringe
rate. The fringe rate in range and azimuth is used to to estimate
the perpendicular component of the baseline as a function of
azimuth position in the interferogram.
The baseline parameter file will be used for the removal of the average phase trend of the interferogram and for the computation of height and slope.
OPTIONS
Instead of estimating the baseline from the fringe rate it can be
calculated from existing orbit state vectors using base_orbit.
SEE ALSO
base_orbit
© Copyrights for Documentation, Users Guide Gamma
Remote Sensing, 2000.
UW, CW, last change 24-Jan-2000.