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◎ EarthView InSAR Tools
(1) Data sub-scene extraction
An interactive image display shows the entire master CEOS SLC
image. The user can select a sub-scene to process by graphically
defining a region of interest, or by defining specific sub-scene
coordinates.
(2) Manual Image Tie-pointing
An interactive GUI-driven tool for marking control points for
co-registration. Includes automatic refinement of marked tie-points.
(3) Differential Phase Removal Tool
Interactive GUI-driven tool allows interferogram and baseline
model corrections with the goal of eliminating residual flat earth
phase. The effect of a correction is previewed in the interferogram
display.
(4) Differential Phase Correction Tool
Interactive GUI-driven tool for correcting residual topographic
phase in differential interferograms. The interferogram and baseline
model is corrected. The effect of a correction may be previewed
in the interferogram before committing to the change.
(5) Phase Unwrap Edit Tool
Allows display of the Unwrapping Control Mask image that shows
unwrapping results and unwrapping errors that are automatically
recognized and highlighted. Additional image displays of the interferogram
and coherence images are used to assist in the interactive marking
of mask lines, clear lines, mask areas, clear areas, and new seeds.
Small sub-areas may be re-unwrapped and the results displayed immediately
from within the tool.
(6) DEM Georeferencing and Height Trend Correction Tool
One or more control points may be used to correct lat/long errors.
Linear, quadratic and higher order trends in the final DEM can be
corrected by estimating the error from GCPs, and applying the correction
in slant range space. This advanced tool allows the GCPs to be marked
on geocoded imagery, with the corrections applied in the slant range
projection. The RMS error statistics, and the resulting DEM may
be previewed before committing to the change.
(7) Area Selection Marking Tools[New]
When using rectangle-marking tools, it is possible to mark rectangles
outside the boundaries of image data. This is not recommended.
(8) Master-Slave Tiepoint Editor Tool[New]
When viewing tiepoint statistics in the tiepoint tool, it is
important to realize that range outliers and statistical outliers,
will still appear in the statistics listing. The “<run>\slave\coregistration\resampling_refined”
file will have two lists of rejected points. These points should
be excluded in the tool. In addition, any unrefined points should
be excluded to get reasonable statistics.
It is recommended that any tiepoints marked in this tool be refined.
Some of the settings in the coregistration analysis options menu
from the main GUI are used by this tool. You must quit the tool
and modify them in the main GUI and then save, to change the behavior
of the tool. It should seldom be necessary to do this.
(9) External DEM TiePoint Editor Tool[New]
The order of the polynomial fit cannot be changed in the GUI.
The default is bilinear. If you wish to change this, edit the file
“run\recipe\external_dem_coregistration”. Change the value of
the fields range.order and azimuth.order under the [fit_region]
line. For biquadratic use the values 2 and 2 etc.
(10) Differential Residual Topographic Phase Removal Tool[New]
This tool may be launched in DEM mode, but may produce error
messages, as there is no external DEM.
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