serena

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  • in reply to: east-west and up-down time series #4088
    serena
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      Hi all,
      I don’t know if there is a QGIS tool to compute the up-down and E/W component, let me know if someone knows.
      Anyway, it is possible to follow this procedure: 1) starting from geocoded results, resample the measurement points (MPs) using the same grid for both ascending and descending; 2) for each cell, separately for asc and desc, compute the average velocity (to obtain a finer estimation you can use a weighted function accounting for the distance of the MPs from the cell center); 3) apply the vector composition to estimate up-down and E/W vectors. The LOS direction is in the SiteDescription.txt file (i.e. AcqHeading <<the angle with respect to the North>> AcqIncAngle: <<incidence angle with respect to the vertical direction>>)
      Regards
      Serena

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