Posted By Nearly Normal on 4/20/2008 at 2:58 AM
I have found that you need good sky and a project site without serious trees, and the more fall in the sewer or storm drain the better.
The RTK solution will sometimes return a bad vertical coordinate. This only happens (HiperLite+) when the system is struggling to return a momentary fixed solution.
So watch out. I would never use RTK in areas where the sewer or storm drain was under 2% fall.