sarproz-group

Warning MT Adaptive Mask

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    • #3761
      janbu
      Participant

      Hi,
      While creating the AD statistical Test in the Adaptive Filter, I get the following warnings:
      !!! Warning: NAN in input values: scrivi may write strange things !!!

      I am using a FULL graph for the images connection. What can be the reason for this?
      Thanks

    • #3763
      periz
      Keymaster

      we would need to see the full log to try to understand.
      you might even need to flag the debug mode to pinpoint the step where the message is given
      best

    • #3766
      janbu
      Participant

      Thanks.
      Attached is the log file and the exportPar if needed.
      Cheers

    • #3767
      janbu
      Participant

      Noticed that the files weren’t successfully uploaded. Here is the download link:
      https://we.tl/t-Ij6K3h4fLq
      Thanks

    • #3771
      periz
      Keymaster

      this is a case where the warning is actually useless, sorry for that
      basically the writing function is set to launch a warning when NaNs are inputed (it can be indicative of some issues),
      however, in this case NaNs are kept by construction at the borders of the image
      you can proceed further, there should be no problem
      best

    • #3774
      janbu
      Participant

      Thank you. That was helpful.
      I have proceeded with the MT adaptive filter, created the interferograms and generated the coherence map.
      In order to get QPS (using the MT adaptive filter) I am assuming I would select points based on spatial coherence
      When plotting the Spatial Coherence I basically get a map of all zero and in fact, no points can be selected (e.g in MISP) using the Spatial Coherence.
      Am I missing something?
      Thanks

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    • #3777
      periz
      Keymaster

      That module generates an MT adaptive mask, it does not calculate interferograms.
      When you have the adaptive mask, you can use it to filter interferograms.
      There is a preset in the InSAR processing options: “multi-temporal apdative”
      https://sarproz.com/manual/mt_adaptive_mask.html
      https://sarproz.com/manual/insar_params.html
      after you get your interferograms, you can generate the spatial coherence map
      best

    • #3778
      janbu
      Participant

      Unfortunately, after creating the MT adaptive mask, I did process all the interferograms, selecting the “MT adapt” in the presets of the InSAR Params. Left everything else as default, processed the interferograms and created the coherence map with the results described.
      Thanks

    • #3779
      periz
      Keymaster

      Did you plot the interferograms?

    • #3780
      janbu
      Participant

      Yes. Not all of them as they are over 3000 (full graph), but they look normal.

    • #3781
      periz
      Keymaster

      that’s something we need to check looking at your data then

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