Dynamic relative gravimeter zero drift compensation method based on satellite gravity anomaly information

Abstract

The invention discloses a dynamic relative gravimeter zero drift compensation method based on satellite gravity anomaly information. The method comprises the following steps of: (1) performing measurement operation based on a dynamic relative gravimeter according to an operation regulation, and processing data to obtain gravity anomaly information; (2) analyzing to obtain average value of gravityanomalies output by dynamic relative gravimeter on single measuring line; (3) obtaining gravity anomaly information output by satellite gravity at different positions of measuring line by utilizing satellite gravity information through interpolation method, and solving average value of gravity anomaly information; and (4) using the gravity anomaly information output by the satellite gravity to calibrate the gravity anomaly information output by the near-surface relative gravimeter to obtain the scheme. Aiming at the problem that the zero position of the dynamic relative gravity sensor has nonlinear drifting, the satellite gravity anomaly information on the measuring line is used for calibrating the zero position of the dynamic relative gravimeter, the system difference is reduced, and thedynamic gravity measurement precision is effectively improved.

Description

technical field [0001] The invention relates to the field of dynamic relative gravimeter compensation, in particular to a compensation method for dynamic relative gravimeter zero drift based on satellite gravity anomaly information. Background technique [0002] Gravity anomaly is an important part of geophysical field information and the core element of gravity field environmental information. It is of great significance in resource exploration, geophysical research, battlefield environment construction, underwater autonomous navigation, weapon precision strike and other fields. There are various means of gravity field measurement, but in comparison, the main way to obtain high-precision, high spatial resolution, and large-scale gravity field information is still near-surface dynamic relative gravity measurement. [0003] In the prior art, the dynamic relative gravimeter and free space gravity anomaly δg can be obtained by deforming the inertial navigation specific force eq...

AI Technical Summary

Problems solved by technology

In order to suppress the zero drift of the gravity sensor, the traditional method is to improve the stability of the output signal of the sensor, the accuracy of temperature control, the shock absorption efficiency of the shock absorber, etc., but the above method will make the system more complicated and reduce the reliability. Increase the system size and cost, and the suppression effect cannot fully meet the application requirements

[0007] Considering that the current dynamic relative gravimeter is limited by the technical level and electronic circuit technology, the zero drift problem cannot be solved in principle, and the zero drift can only be suppressed by improving the temperature control accuracy and the shock absorption efficiency of the shock absorber as much as possible.

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