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Purpose

 

This functionality enables to modify the SAR pair combination and connection network which was generated in the Connection Graph step.

 

Technical Note

 

The tool can be used either before or after the Interferometric Workflow step; in the latter it is not possible both to change the "Super Reference file" or to add new pairs. The following constraints must be respected:

•New pairs cannot be added if the Interferometric Workflow and successive steps have been already executed.

•Neither single acquisitions nor image pairs can be removed if they are used in the connection network exploited by the Delaunay 3D. This removal can be done only after the first SBAS Inversion.

•Images or pairs cannot be removed if they are needed to link separate blocks and the option Allow Disconnected Blocks had net been checked.

It must be noted that the connection graph editing can be carried out at any point of the processing chain after the Connection Graph has been executed.

The "Remove Pair" and the "Remove Image" functions allow selecting a single Reference and single or multiple Secondarys.

Each time the report is edited the previous one is saved, in the work_connection_graph subfolder, with a progressive number (the original being saved as "CG_report_1.txt"); this is to allow the possibility to restore any previous connection scenario.  

 

Input Files

 

Load Report

This button loads the SBAS report.

Load Graph

This button loads the graphs related to the SBAS Connection graph.

 

Parameters - Principal Parameters

 

Load Report

This button loads the SBAS report.

 

Load Graph

This button loads the graphs related to the SBAS Connection graph.

 

Output Files

 

None.

 

General Functions

 

Cancel        

The window will be closed.

 

Help        

Specific help document section.

 

 

Specific Function(s)

 

Add Pairs

The pair selected in the "Reference List" and "Secondary List" is added to the original connection network. The process must be re-run from the step 2. The interferometric pairs processed in the previous iteration are not handled; only the new entries will be processed.

Remove Pairs

The images selected in the "Secondary List" only is removed from the original connection network. Multiple choice is accepted.

Add Images

The input image list is added to the original connection network. The process must be re-run from the step 2. The interferometric pairs processed in the previous iteration are not handled; only the new entries will be processed.

Remove Images

The image selected in the "Reference List" or "Secondary List" is removed from the original connection network.

Automatic

The remove pair editing is done automatically accordingly with the Edit Reject Automatic Strong Discontinuities (%), Edit Reject Automatic High Std (%) and Edit Reject Automatic Poor Coverage (%) parameters. The reject and keep stack meta/series are generated as visual description of the automatic editing tool behavior. The corresponding last processed unwrapped meta/series is updated as well.

Edit Reject Automatic Strong Discontinuities (%)

By setting a reject threshold higher than zero and clicking the Automatic button of the SBAS Edit Connection Graph panel, the worst interferograms (a percentage of the whole interferogram stack) are discarded from the stack. The metric for the unwrapping interferogram sorting is the number of wrong discontinuity phase cycles with respect to the number of valid pixels.

Edit Reject Automatic High Std (%)

By setting a reject threshold higher than zero and clicking the Automatic button of the SBAS Edit Connection Graph panel, the worst interferograms (a percentage of the whole interferogram stack) are discarded from the stack. The corresponding last processed unwrapped meta/series is updated as well. The metric for the unwrapping interferogram sorting is the standard deviation.

Edit Reject Automatic Poor Coverage (%)

By setting a reject threshold higher than zero and clicking the Automatic button of the SBAS Edit Connection Graph panel, the worst interferograms (a percentage of the whole interferogram stack) are discarded from the stack. The corresponding last processed unwrapped meta/series is updated as well. The metric for the unwrapping interferogram sorting is the valid pixels coverage.

Undo

The previous connection network is restored.

 

References

 

None.