Doppler Controlled IPS Survey of Gravity Net

Abstract

In one of the projects under consideration it was decided to observe a high accuracy and extremely dense gravity net. The accuracy and density requirement made it implicit to have an accurate knowledge of the position of the gravity stations being observed. The plan included full consideration for current theoretical and technological limitations, and the inherent distortions and inaccuracies of the available national control (with its impending improvement as NAD 83 and NAVD 88). Weightage also was given to the involved ruggedness of the terrain in some parts of the area to be surveyed, and the availability of instrumentations and other resources. Out of many potential techniques considered, a Doppler controlled Inertial Positioning System (IPS) survey approach was selected. The present paper discusses this concept and the special features found necessary for the project.