First order gravity network of Republic of Moldova

Abstract

In 2006 the Land Relations and Cadastre Agency of Republic of Moldova in cooperation with the National Geospatial-Intelligence Agency (NGA) of United States of America performed gravity campaign to establish a new fundamental gravity network MOLDGRAV06. Gravity measurements were carried out at 20 base stations and their excentric. In order to constrain the relative gravity measurements 3 absolute gravity stations were determined using FG5 absolute gravimeter. The absolute gravity data acquisition and processing were done by Micro-g software. The Total uncertainties of the absolute gravity measurements are about 5 $\mu Gal$. The relative gravity stations and local vertical gradients have been measured using three LaCoste & Romberg G meters. The gravity network was designed as polygons. Each station was occupied at least twice. The preliminary data processing was performed by GVREC, ETIDE and GVCOMP programs. The network adjustment was performed by GRAVNET program. The RMS value of the relative gravity stations is better than 10 $\mu Gal$.