Establishment of a Gravimetric Polygon of Calibration in Sinaia, Prahova County

National Centre of Cartography conducted between May 2016 - September 2017 the execution project "Establishment of a gravimetric polygon of calibration in Sinaia, Prahova County". The gravimetric polygon consists of 5 stations spread over a distance of 11 km and is located at a maximum altitude difference of 775 m covering a gravity interval of 160 mGal. The polygon will be used to check the accuracy of relative spring gravimeter before and after the measurements in the gravimetric network, and to determine the calibration factor/constant for recalibrating our gravimeters. In this article are presented the main activities to create the gravimetric polygon, the results obtained so far and the prospects for the coming years.