On some problems connected with the determination of recent vertical crustal movements from repeated levellings and gravity measurements |
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| Authors: | Bernhard Heck Hermann Mlzer |
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| Institution: | Geodetic Institute, University of Karlsruhe, D-7500, Karlsruhe, F.R. of Germany |
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| Abstract: | Besides systematic instrumental and environmental effects in high-precision levellings and gravimetry, some theoretical problems are decisive in the evaluation and interpretation of recent vertical crustal movements. In view of the increased accuracy of recently developed portable instruments for absolute gravity measurements, some global effects on gravity may no longer be neglected, necessitating additional time-dependent reductions for polar motion effects. Another problem concerns the evaluation of recent vertical crustal movements from repeated geodetic measurements: a rigorous treatment of the problem demands both repeated levellings and gravity measurements; only under additional hypotheses can these limitating prerequisites be eliminated. |
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