  The purpose of this document is to demonstrate the reasoning behind the
specific measurement requirements in the white paper by James et al. titled
"The value of surface-based gravity and gravity gradient measurements at the
Moon's south pole with Artemis III". As described in this document, measurement
requirements in practice will depend on a number of factors, including the
geographic location, the shape of the local terrain, the precision to which
elevation is known, and the nature of drift in the gravimeter.

Instrumentation and Methods for Astrophysics;Earth and Planetary Astrophysics