In the IPTA point lists contain the coordinates (range and azimuth pixel number relative to the reference SLC geometry) of the selected points. Data at these points (SLC values, interferogram values, ...) are stored in point data stacks with each record corresponding to a different SLC or interferogram. The point data stack of mask values contains for each point a flag (0 or 1) which indicates if the data of a point are considered (1) or not considered (0).
In an IPTA analysis there are typically two main stack families used. The first one is the point data stack of SLC values (pSLC) together with the stack of SLC parameters (pSLC_par). The second one includes all the point data stacks and parameter stacks related to interferometric pairs.
The itab is an ascii text file containing a table associating
interferogram stack records with pairs of SLC stack records. Each
line contains four entries, which are:
pSLC_rec1 - the SLC stack record number of the master SLC
pSLC_rec2 - the SLC stack record number of the slave SLC
pINT_rec - the interferogram stack number
switch_flag - a flag to activate (not 0) or deactivate a line
The itab plays an important element in the IPTA. It
facilitates the handling of large amounts of data sets, parameter
files etc. in a clear, flexible, and efficient manner.
© Copyrights for Documentation, Users Guide and Reference Manual by Gamma Remote Sensing, 2003.
UW, CW, TS, last change 19-Sep-2003.