Gamma DIFF&GEO: Reference Manual

scale_base

ANSI-C program: scale_base.c

NAME
scale_base - Scale unwrapped phase with location dependent scale factor determined from baseline files.

SYNOPSIS
<unw-2> <scaled_unw-2> <baseline-1> <SLC-1_par-1> <interf_par-1> <baseline-2> <SLC-1_par-2> <interf_par-2>< <int_flt_flag>

<unw-2>	unwrapped interferogram file name (to be scaled)
<scaled_unw-2>	(output) scaled unwrapped file name
<baseline-1>	baseline file of 1. interferogram
<SLC-1_par-1>	parameter file of SLC-1 of 1. interferogram
<interf_par-1>	interferogram/offset processing parameters of 1. interferogram
<baseline-2>	baseline file of 2. interferogram (to be scaled)
<SLC-1_par-2>	parameter file of SLC-1 of 2. interferogram (to be scaled)
<interf_par-2>	interferogram/offset processing parameters of 2. interferogram (to be scaled)
<int_flt_flag>	interferogram (0) or flattened interferogram (1) to scale (default=0)

EXAMPLE
scale_base ../25394_05721/25394_05721.int_sm.unw 25394_16242.phase_sim 25394_16242.base 25394.slc_esa.par 25394_16242.off ../25394_05721/25394_05721.base ../25394_05721/25394.slc_esa.par ../25394_05721/25394_05721.off 0

INSTALLATION
Source code scale_base.c in ./src. For compilation adjust and use Makefile: Executable version scale_base in ../bin

AVAILABILITY
Uses ISP type definition file typedef_ISP.h.

DESCRIPTION
scale_base is used in 3- and 4- pass differential interferometry to scale the unwrapped phase of an interferogram used as reference for the topographic phase of the differential interferogram.

Both unflattened and flattened unwrapped interferograms can be scaled.

The location dependent phase scale factor is calculated from the baselines of the interferogram used as topographic reference and the differential interferogram. Baseline estimates can be calculated based on the orbit data, based on the registration offsets, based on the (unflattened) interferogram fringe frequency, or by a combination of these methods.

The real valued scaled unwrapped phase is subtracted from the differential interferogram to determine the surface displacement estimation using the program sub_phase.

OPTIONS
None.

SEE ALSO
typedef_ISP.h, baseline file, sub_phase.

DIAGNOSTICS
All messages are generally self-explanatory.

NOTES
None.