Wind field estimation resolution


When I use SNAP to estimate the wind field the resolution of the data is about 20 km.
There is any way to improve this? (Improve the resolution to 5 km, for example.)

You can set the window size to be smaller than 20 km (which is the default window size).

I have used 10 km but I have not pushed it any smaller, and I am not sure how small I can go and still consider the results valid.

If anyone has any comments on what is the smallest reasonable window size, please reply to this.