Investigations of Gravity Variations and Instrumental Properties by Combing
Superconducting and Absolute Gravity Measurements
H. Wilmes, H. Wziontek, R. Falk and P. Wolf
Bundesamt fuer Kartographie und Geodaesie, Frankfurt am Main, Richard-StraussAllee 11, Germany.
There are several gravity stations with superconducting gravimeters (SG) where
repeated absolute gravity measurements are taken. Usually these data enable only to
determine the SG drift rate and check the calibration parameters. This analysis does
not completely exploit the information available in the observations.
It is shown that a combined analysis of both data series enables a clearer view upon
both, the station gravity variations together with monitoring the instrumental
properties.
An improved method is described to derive the drift curve and the scale function of
the superconducting gravimeter. In addition the gravity time series allows a view to
the instrumental stability of one or more absolute meters operated at this station. The
analysis method uses the original gravity observations and does not require additional
reductions models.
Oral presentation