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# 1. Open tool
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Open the "Combine"-tool:
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# 2. Select input type
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Select "InSAR LOS feature". If you haven't imported InSAR data, do so using for example the "From web"-tool (see [here](example-import-from-web) for an example):
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Add the features you imported to "InSAR LOS features":
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# 3. Select feature attribute fields:
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In the drop down menu under "InSAR data fields", you can see the common fields of your InSAR features. Select the field that corresponds to your InSAR LOS measurement. Here we use the field called "mean_velocity".
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In the drop down menus under "InSAR LOS unit vector fields", select the fields of your InSAR features that corresponds to the LOS-unit vector components. The components must correspond to East-North-Up directions. Here we use the fields called:
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- "los_east"
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- "los_north"
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- "los_up"
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It is important that the fields are added in the order corresponding to East, North and Up.
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# 4. Specify output feature and what parameters to compute:
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Under "Output">"CSD output feature", type the name of the feature you will create. Under "Output">"Auxiliary output parameters", select the parameters you want to compute.
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# 5. Run:
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Click Run:
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A feature of points containing CSD parameters should appear in the Contents-pane and map after a while.
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