sarproz-group

Warning MT Adaptive Mask

This topic contains 10 replies, has 2 voices, and was last updated by  periz 2 weeks, 3 days ago.

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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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