periz

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  • in reply to: Possible error in debursts #8399
    periz
    Keymaster

      The log file was not uploaded, try zipping log files in the future
      from the inputpar file we see anyway that you are using an old Sarproz version
      soon we’ll post here in the forum instructions to download Sarproz compiled with matlab 2022a
      try again later with the new version
      if issues perists, we’ll start investigating the log file
      in the meanwhile, you can check images (searching for issues in the amplitude) and interferograms (to check possible phase jumps).
      also, it’s useful to see the images graph to have an idea of your dataset
      best

      in reply to: Displacement linear graph not displaying in Google Earth #8321
      periz
      Keymaster

        Please zoom in and keep clicking on points
        you will see the time series
        the point you picked up is just for visualizing the general picture from the distance, it’s not a real target
        best

        in reply to: Questions about Images Incidence Matrix #8307
        periz
        Keymaster

          For some reasons we never noticed this post, sorry.
          The variable you are mentioning it the Incidence Matrix of the graph (or network) connecting the images of your site/project. The graph is basically the way in which “interferometrically” connect the images you have. There are many ways to connect your images: you can use the star graph (with one image at the center, the Master), or the full graph (each image is connected to all others) and so on. You can find a list of options in the dataset selection panel.
          Regarding the sign of interferograms (image A – image B or viceversa) please read this https://sarproz.com/manual/save_interfs.html
          This is topic thoroughly treated in the course.
          Best

          in reply to: curvy edge of orthorectified image #8271
          periz
          Keymaster

            exactly

            in reply to: Data import #8240
            periz
            Keymaster

              Hi, depending on the way in which you unzip your data, your data can be extracted in subfolders, masking the contents in a way that the software does not recognize them.
              The standard way Sarproz recognizes sentinel data is, if the SLC folder contains directories called S1A_* … .SAFE or S1B_* … .SAFE
              best

              in reply to: Sentinel 1 IW SLC Product Reprojection #8216
              periz
              Keymaster

                No. You can do the reprojection yourself once you get the final output from Sarproz
                best

                periz
                Keymaster

                  it surely makes sense to consider the temporal coherence of a point
                  but not for estimating height and/or velocity
                  the temporal coherence is used e.g. to weight the spatial integration of the APS graph
                  best

                  periz
                  Keymaster

                    hi

                    * Sarproz gives explicit messages about the options that are taken. if you read messages carefully, you should be able to understand whether interferograms are read, whether flattening is assumed and so on
                    * in any case, if you apply a standard processing, the phase is read from images and the flat terrain phase is removed afterward. you can choose whether to remove the DEM or not and whether to estimate a residual height or not
                    * phase is read from interferograms only if you choose to use the coherence as a weight. in such case, the software assumes that inteferograms are flattened and that the external DEM was removed
                    * if no interferograms are available, the phase is taken from images, flat terrain and external DEM as subtracted automatically.

                    + in your case, if you want the software to read your custom processed phase, star graph, generate star graph interferograms, choose to weight data with the coherence
                    + if you do not want to use a weight in the processing, just set the coherence equal to 1 (it’s the amplitude of interferograms)
                    + about naming policies, check here: https://sarproz.com/manual/save_interfs.html

                    best

                    in reply to: sparse point processing using a few images #8199
                    periz
                    Keymaster

                      you are not fitting a single line. you are fitting a planar surface (height and velocity).
                      with 4 images you can look at 3 interferograms. or you can calculate the average if in your particular case it makes sense. or you can neglect height and atmosphere if you are in the proper situation and assume that the phase content is just movement.
                      in general, just calculate interferograms and check them.
                      best

                      in reply to: Including Corner Reflectors into Multi Image Processing #8194
                      periz
                      Keymaster

                        hi

                        * if you want to cherry pick only a few pixels of interest, you can use this module: https://sarproz.com/manual/kml2mask.html to generate your own mask of pixels, eg by importing a simple list of geographic coordinates

                        * if you want display data (like amplitude or coherence) of cherry picked pixels, you can use this module (visualization tools): https://sarproz.com/manual/class_sito.html

                        * if you want to process and analyze amplitude time series data (eg to detect temporary scatterers) you can use this module: https://sarproz.com/manual/amp_series_proc.html

                        all these topics are discussed in the Sarproz training course
                        best

                        in reply to: Scatter Plot #8077
                        periz
                        Keymaster

                          Hi Mahtab,
                          saving a selection of points does not mean saving the plot you are diplaying
                          when you save a selection of points, you save a 2d vector, where the 2 dimensions are sample and lines, independently from what you have on x and y axes in the scatter plot
                          the only choice you have is whether to save a color or not, as indicated here https://sarproz.com/manual/xplot_save.html
                          if later you want to display/export latitude and longitude, simply load the desired selection of points and then choose lat/lon on the x/y axes
                          best

                          in reply to: “NAN in input values” #8028
                          periz
                          Keymaster

                            Hi Janbu,
                            there can be a number of reasons for receiving that message, we need more infos to understand the case.
                            Generally speaking, even if for some reasons NaNs are in the data, that does not mean you cannot process and analyze successfully your data.
                            Please check the images one by one: do you observe black areas?
                            Did you generate the adaptive mask, did you plot it, how does it look like?
                            Did you generate interferograms filtered with the adaptive mask?
                            If issues are there, please send us the log file by email
                            thanks

                            in reply to: SRTM download issues #7894
                            periz
                            Keymaster

                              please read well this document https://sarproz.com/manual/Sarproz_errors_management.html
                              and update your software
                              best

                              in reply to: Error downloading COPERNICUS DEM #7844
                              periz
                              Keymaster

                                Hi,

                                did you do the steps suggested by the software?

                                generally speaking, keep always in mind this: https://sarproz.com/manual/Sarproz_errors_management.html
                                and report log files and error files, if any.
                                are you using the last version of the software?

                                best

                                in reply to: Which ip address sarproz connects to when it starts? #7794
                                periz
                                Keymaster

                                  Hi,
                                  when you get problems/errors, it’s good practice to send also the logs and possible additional error files.
                                  Anyway, in your case, please be aware that when Sarproz starts, it does not try to connect to a specific IP/server. It’s only checking internet connectivity through common webpages, like yahoo. Do you have internet access?
                                  If you are using Matlab, you could set the general web timeout to a higher value.
                                  best

                                Viewing 15 posts - 1 through 15 (of 753 total)