Low-low tracking gravity measurement satellite four-point three-line model and establishment method thereof

Abstract

The invention belongs to the technical field of satellite gravity measurement, and particularly relates to a low-low tracking gravity measurement satellite "four-point three-line" model and an establishment method thereof. The model structure includes centers of mass, an accelerometer mass inspection center, LRS antenna phase centers and a GNSS antenna phase center of two tracking satellites, and a datum line, a measurement line and inertial lines. The datum line is the connecting line of the centers of mass of the two tracking satellites, i.e. the datum line is a satellite gravity measurement target line. The measurement line is the connecting line of the LRS antenna phase centers of the two tracking satellites. The inertial lines are the connecting lines between the centers of mass of the tracking satellites and the LRS antenna phase centers. Accurate and abstract description of a system prototype can be realized so that the reliable basis can be provided for the design of a low-low satellite-to-satellite tracking gravity measurement system; and multiple key technologies of the low-low satellite-to-satellite tracking gravity measurement system are comprehensively combed with the basis acting as the cutting point so that comprehensive distribution of multiple complex errors existing in the gravity measurement system can be realized, and thus the model has important guiding significance for subsequent satellite gravity data processing.

Description

technical field [0001] The invention belongs to the technical field of satellite gravity measurement, in particular to a low-low tracking gravity measurement satellite "four points and three lines" model and its establishment method. Background technique [0002] The construction of low-satellite tracking gravity measurement system is a huge and complex system engineering, involving many key technologies in multidisciplinary fields such as astronomy, geodesy, and space physics. It has the characteristics of technical difficulty, high cost, and complex operation. In addition, in the entire measurement system, there are system errors caused by various reasons such as structural deformation errors, time scale errors, accumulative measurement errors, and electromagnetic force errors. There are many types of errors and complex causes, so it is difficult to consider them comprehensively during the measurement process, which seriously affects the accuracy of the measurement results...

AI Technical Summary

Problems solved by technology

[0003] At present, the main models in the field of gravity satellite measurement system include LEO satellite network simulation model based on NS, switching model based on satellite movement mode, satellite communication system model based on AdHoc network, etc.; modeling methods mainly include agent-based modeling method , UML-based visual modeling method, discrete coordinate method, etc. These models and methods can effectively solve some specific problems, but they cannot be well applied to the low-satellite tracking gravity measurement system

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