A method and system for calibrating an accelerometer using a satellite tracking satellite device

Abstract

The invention discloses a method and system for calibrating an accelerometer using a satellite-to-satellite tracking device. The method comprises the steps that original observation data on the satellite-to-satellite tracking device is acquired; coordinate transformation is performed on the original observation data to obtain observation data after the coordinate transformation; a gravity gradientcalculated value is calculated and obtained according to the observation data after the coordinate transformation and a gravity gradient observation equation; deviation calculation is performed on the gravity gradient calculated value and an actual gravity gradient observation value to obtain a deviation value; and the actual gravity gradient observation value is calibrated according to the deviation value. The method and system adopt the satellite-to-satellite tracking device to acquire the observation value, and calculate and obtain the gravity gradient calculated value, thereby effectivelysolving the problem that data generated simply by a gravity field model cannot meet better precision requirements, solving the problems such as terrain constraints, and achieving the purpose of high-precision calibration of the gravity accelerometer.

Description

technical field [0001] The invention relates to the field of geodesy, in particular to a method and system for calibrating an accelerometer by using a satellite tracking satellite device. Background technique [0002] At present, the satellite gravity gradient platform developed at home and abroad is mainly the GOCE gravity gradient measurement satellite mission launched by the European Space Agency and the civilian gravity gradient measurement satellite technology system being developed in my country. The GOCE satellite launched by the European Space Agency is equipped with multiple types of payloads, including three-axis orthogonal gravity gradiometer (EGG), laser retroreflector (LRR), high-precision dual-frequency GNSS receiver, satellite tracking device, attitude control system, Planetarium and ion thrusters. Among them, the gravity gradiometer and satellite tracking device are the key loads of the GOCE satellite technology system. [0003] The original observation dat...

AI Technical Summary

Problems solved by technology

However, this method has very high requirements for the selection of inspection areas. In practical applications, it is found that the calibration effect is the best in areas with gentle terrain fluctuations and dense data collection; the calibration effect is poor in areas with large terrain fluctuations and sparse data collection, which cannot meet the accuracy level requirements.

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