Download Delft Object-oriented Radar Interferometric Software User's manual

Deltaline_slave0N_dem:
-194.082
Deltapixel_slave0N_dem:
-18.8867
Deltaline_slaveN0_dem:
-194.479
Deltapixel_slaveN0_dem:
-17.8064
Deltaline_slaveNN_dem:
-194.232
Deltapixel_slaveNN_dem:
-18.9409
*******************************************************************
* End_dem_assist:_NORMAL
*******************************************************************
The output in the logfile is more verbose, specifying the results of the intermediate steps. Also go over the
standard out in case of problems, with the SCREEN set to DEBUG level.
19.3
Implementation
The DEM-assisted coregistration is estimated in two steps:
First, the DEM is radarcoded to the coordinate systems of the master and slave image. Per DEM point the
master coordinate and the offset between master and slave is saved to a file. Both the master coordinates
and offsets are real valued.
Second, the offsets are interpolated to the integer grid of master coordinates. A linear interpolation based on
a Delaunay triangulation is used. The software package Triangle for the Delaunay triangulation is kindly made
available by Jonathan Shewchuk [Shewchuk, 1996, Shewchuk, 2002], see also
http://www.cs.cmu.edu/˜quake/triangle.html.
The finally optained master-slave offsets per master pixel are saved to a file and used in the RESAMPLE step
to resample the slave image to the master geometry.
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