Yes, Radar technology has to deal with both the Curvature of Earth and Refraction

This one is so trivial and obvious I'm just going to link you three different books on RADAR technology and you can go read them.

https://books.google.com/books?id=zRJTAAAAMAAJ&focus=searchwithinvolume&q=curvature

https://books.google.com/books?id=bxS_AAAAIAAJ&focus=searchwithinvolume&q=curvature

https://books.google.com/books?id=U0XG5WB-vY8C&q=curvature#v=snippet&q=curvature&f=false