GAMMA Interferometric Point Target Analysis Software (IPTA): Reference Manual

zero_pt

ANSI-C program: zero_pt.c

NAME
zero_pt - zero data values as specified in an interferogram table and point mask

SYNOPSIS
zero_pt <plist> <pmask> <pdata1> <itab> <pdata2> <type>

<plist>	(input) point list 1 (int)
<pmask>	(input) point data stack of mask values (uchar, enter - for none) 0:set data to 0.0 1: save data value
<pdata1>	(input) point data stack 1
<itab>	(input) table associating interferogram stack records with pairs of SLC stack records (ascii) layers where data values can be set to zero have the layer flag column 4 set to 0
<pdata2>	(output) point data stack with values set to 0 in layers
<type>	data stack type (0:fcomplex 1:scomplex 2:float 3:int 4:short 5:byte)

EXAMPLE
zero_pt pt1 pmsk3 ptot_def3s_los itab_msk ptot_def3s_los_msk 2
set data values in ptot_def3s_los_msk to 0 in those layers where the itab layer mask is 0 and pmsk3 is 0

INSTALLATION
Source code zero_pt.c in ./IPTA/src, executable version zero_pt in ./IPTA/bin

DESCRIPTION
zero_pt is a program that sets the values in a data file for selected points and layers. For the data value for a point in a particular layer to be set to 0, the layer mask in the itab file for that layer and the value of the point mask must also be 0. This program is use for setting specific point data values to 0, for only a specfied time. the time window is specified by editing a copy of the itab used for processing the IPTA data. Points in a certain region can be set to 0 by generating a 2d raster mask that is 0 only in the region to be masked out. This raster file is then read by mask_pt to create a point list mask that is 0 for all points in that region. This point list mask can than used as input to zero_pt.

OPTIONS
none.

SEE ALSO
mask_pt, ipta.h.