Detailed information on the gravitational effect of the Earth's topographic and isostatic
masses can be calculated by gravity forward modeling. Within this book the tesseroid-based
Rock-Water-Ice (RWI) approach is developed which allows a rigorous separate modeling of the
Earth's rock water and ice masses with variable density values. Besides a discussion and
evaluation of the RWI approach applications in the context of the GOCE satellite mission and
height system unification are presented.
