Bollettino di Geofisica Teorica ed Applicata , 1999 , vol. 40 , no 3-4 , pp. 205 - 210.

Gravimetry data validation in Algeria

BENAHMED DAHO S. A.* , KAHLOUCHE S.

* National Centre of Spatial Techniques, Geodetic Laboratory

Abstract

A Method for the validation of gravity measurements using the Least Squares Collocation (LSC) method and Gravsoft software of Copenhagen University is applied on a small zone in Algeria. The gravity data, provided by the B.G.I., consisting of 12472 gravity measurements covering the region, were analysed and validated. The validation has been applied systematically to predict free-air gravity anomalies reduced from the effect of the spherical harmonic coefficient set OSU91A. The detected gross errors represent 4.7 of the land data. This work shows the non-homogeneity of the data used and their insufficient accuracy.