Cohrency Matrix T3 window size

I am calculating the Cohrency Matrix T3, I would like to know, what is the default window size for the calculation of this matrix in SNAP?

Thank you

As far as I know, the default window size for T3 matrix calculation is 3x3. However, it can vary based on your specific project needs or data characteristics. If you’re working with fine resolution data or require detailed analysis, you might consider experimenting with smaller window sizes.

I think that for broader landscape features or smoother results, a larger window could be better and more beneficial.

@MysticMosaic Thank you so much for the reply. Do you know how can I modify it ? The polarimetry matrix generator does not have any option to modify the window size.

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You’re welcome! To adjust the window size for your T3 matrix in SNAP, you’ll want to head over to the Polarimetric-Speckle Filter section. It’s not immediately obvious, so I get why it’s a bit tricky to find.
First off, open your data in SNAP. Then, go to ‘Radar’, find ‘Polarimetric’, and click on ‘Speckle Filter’. Once you’re in the Speckle Filter tool, pick your preferred filter (like Lee or Frost). In there, you should see an option for ‘Window Size’. This is where you can adjust it to any size you want.

Personally, I’d recommend playing around with different sizes to see what gives you the best results.

@MysticMosaic I see…I was under the impression that changing the window size in speckle filter only affects the filtering and is independent of any operation that is done after that. I will have a look. Thank you once again :slight_smile:

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