Compensation method for zero drift of dynamic gravimeter based on satellite gravity anomaly information

Abstract

The invention discloses a dynamic relative gravimeter zero drift compensation method based on satellite gravity anomaly information, which includes: (1) performing measurement operations and processing data based on the dynamic relative gravimeter according to operating procedures, and obtaining gravity anomaly information on the survey line ( 2) Analyze and obtain the average value of the gravity anomaly output by the dynamic relative gravimeter on a single survey line (3) Use the satellite gravity information to obtain the gravity anomaly information output by satellite gravity at different positions on the survey line by interpolation method and calculate the average value (4) The gravity anomaly information output by the satellite gravity is used to calibrate the gravity anomaly information output by the near-surface relative gravimeter, that is, the program aims at the problem of non-linear drift in the zero position of the dynamic relative gravity sensor, and uses the satellite gravity anomaly information on the survey line Calibrate the zero position of the dynamic relative gravimeter, reduce the system error, and effectively improve the accuracy of dynamic gravity measurement.

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 contrast, 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 equa...

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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