A new and high-precision gravity base network in the south of the Tibetan Plateau

Abstract

A new gravity base network in the south of the Tibetan Plateau was established with a FG5X absolute gravimeter and three CG-6 gravimeters. The gravity base network consists of 10 absolute gravity points and 17 relative gravity points. Processing of the absolute data, pre-processing of the relative data and gravity network adjustment model are briefly described. Based a constrained weighted least squares, the combined adjustment of absolute and relative gravity measurements results in the gravity values with a precision of about ±4.1 μGal.

Keywords

• Tibetan plateau
• Gravity datum
• Gravity network adjustment