Polarization , topsar split

Hey…When I took a step of top split… one of the two pictures contains only.sw2-VH so I chose VH Should I choose. Only VV or i have to download another image contain vv …? My second question: When I open the image, it is inverted. Consequently, when I perform. Subset. I rely on the coordinates, but the coordinates are on the inverted part. Is there a solution to this problem?"