Sentinel-1 SAR imagery may need filtering

#1

Dear forum

SENTINEL HUB is a great product indeed but I was wondering if the Sentinel-1 SAR GRD VV [db] orthorectified images available are filtered for speckle using e.g. a 5x5 Lee Filter and/or a 3x3 median filter? all S-1 SAR VV [db] orthorectified imagery I have browsed so far on the app appear grainy - and as a result, in my opinion, of little use.

Below a quick example between a SNAP processed S-1 SAR image and the same image offered by SENTINEL HUB - if you ignore the land mask, and only look at the brightness difference over the ocean, the difference is evident. Is it possible for SENTINEL HUB to either filter the S-1 SAR images offered as VV in db or add another layer for the users? Thanking you in advance for your valuable help.

#2

Specke filtering is not yet applied.
We are looking into how to implement it (at scale) but are not there yet.
I you are using EO Browser, make sure that you use AWS datasource as the avering on low scales is better there

#3

Thank you very much for the prompt reply.
I actually was not using AWS but the EO cloud instead, by default.
And swapping the settings, the results are better and more towards what I am looking for. Great tip, thanks.
Looking forward to the speckle filtering being implemented for greater results.