sarproz-group

Noisy lines

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    • #3189
      antig
      Participant

      I extract slaves to my stack. Some images give warnings

      IMAGE ALIGNMENT FAILED FOR DATE 20161128!!!
      >>>WILL USE AN ESTIMATION HERE<<<<
      Interferograms with 20161128 will see noisy lines!!!<<<

      so what is correct to do. Remove or keep them in the stack?
      It is Sentinel 1 images

    • #3192
      Yuxiao
      Spectator

      The message tries to be self-explanatory.

      In some cases, one cannot achieve a perfect “burst alignment” for TOPS. Burst alignment here means the following:

      Say, line no. 100 of the master image comes from burst 1; then line 100 of slave image must also come from burst 1. If it comes from burst 2 you will see noisy lines in the interferogram (because the signals from burst 1 and burst 2 are not coherent).

      In most cases, this alignment can be achieved for every line.

      In a few cases, you cannot perfectly achieve this, and there will be a couple of lines having a problem of alignment.

      Usually, this would only cause a few noisy lines in the interferogram. You can check your interferogram and see if this is true.

      If we want to understand what is happening in this particular case, please send in the full log.

      yuxiao

      • This reply was modified 1 year, 5 months ago by Yuxiao.
      • This reply was modified 1 year, 5 months ago by Yuxiao.
    • #3195
      antig
      Participant

      Thank You for explanation.

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