Bulletin des sciences géographiques de l'INCT
Volume 7, Numéro 1, Pages 2-10
2003-04-30

First Order Gravity Network Of Belgium



Authors : Everaerts M. M . Lambot Ph . Van Hoolst T . Van Ruymbeke M . Ducarme B .

Abstract

Between 1998 and 2001 the Royal Observa tory of Belgium and the National Geographic lnstitute of Belgium performed several gravity campaigns to establish a new Belgian Gravity Base Network (BLGBN98). There are 41 base points. The scale is well constrained by 8 absolute gravity stations. Nine gravimeters (LaCoste & Romberg and Scintrex) have been used on the field. The data have been reduecd in a common adjustment. A scale factors has been determined for each instrument. The RMS error on the unit weight reaches 19 µgal. The RMS error on t he gravity points is ranging between 4 µgal and 10 µgal. The results show the distortions of a previous reference network realized i n 1978.

Keywords

First Order Gravity Network of Belgium

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