I have downloaded a global level 3 smos data and I had to change the projectin as it was not projected corretly. Using a subset I cut the UK map which is my AOI. After the reprojection I get a different pixel sizes with 3 succesive pixels having the same value. why this happens after reprojection?can anyone help me with this issue?

Overlay smos and sentinel 1 using layer manager

As already mentioned in the other thread (Overlay smos and sentinel 1 using layer manager) SMOS Level 3 is not supported.
However the succesive pixels occur probably because of the irregular cell size of the EASE grid. Not sure. The cells are not square but after reprojection they are.