Assessment of Means for Determining Deflection of the Vertical.

摘要

This Interim Technical Report documents the first phase of a study of methods for determining deflections of the vertical. In this phase, the astrogeodetic and gravimetric methods have been examined. The objectives of these investigations have been: assessment of the accuracy of alternative astrogeodetic procedures; identification and analysis of potential improvements in astrogeodetic instrumentation; documentation of the gravimetric method and identification of achievable accuracy; development of error models for astrogeodetic and gravimetric techniques. The second phase of this program will address techniques for determining deflections of the vertical from combinations of astrogeodetic, gravimetric, inertial, and gradiometric techniques. (Author)