Revisiting absolute gravimeter intercomparisons

Henri 16 . 04 . 2010 Final report Absolute gravimeter Intercomparison

Revisiting Miller’s Limit: Studies in Absolute Identification

.................................................................................................................... 1 Benchmark Phenomena ............................................................................................. 3 Limitation in Learning ...................................................................................... 4 Bow & Set Size Effect ...............................

Improving the determination of the gravity rate of change by combining superconducting with absolute gravimeter data

This paper evaluates different data-processing methods to determine the gravity rate of change, using repeated absolute gravimeter (AG) measurements and continuous monitoring by a superconducting gravimeter (SG). Based on synthetic data representative of signals observed by SGs at various station locations, we demonstrate that the addition of SG information mitigates the error in the estimation...

New method of digital fringe signal processing in an absolute gravimeter

This paper describes a digital fringe signal processing method realized in the new Tsubokawa-type transportable absolute gravimeter at the National Astronomical Observatory, Mizusawa (NAOM), Japan. A data processing algorithm is based on the second-differences method that uses neither the nonlinear least-squares approximation nor the commonly adopted fringe counting. An estimated uncertainty sh...

Field Tests of a Portable MEMS Gravimeter

Gravimeters are used to measure density anomalies under the ground. They are applied in many different fields from volcanology to oil and gas exploration, but present commercial systems are costly and massive. A new type of gravity sensor has been developed that utilises the same fabrication methods as those used to make mobile phone accelerometers. In this study, we describe the first results ...