基于标准磁块模型的赤道作图法误差分析

赤道作图法是卫星及其部件磁矩测量和计算的主要方法，其测试结果受到多种因素的影响。文章首先介绍赤道作图法（亦称近场分析法）的基本原理，分析该方法在测量和计算磁矩过程中的部分误差来源；然后基于标准磁块模型研究模型磁偏心距、环境磁场波动与赤道作图法测试误差的关系；同时提出近远场梯度差分的方法以提升磁矩计算结果的准确度。利用改进方法对标准磁块模型进行测量和数据处理的结果表明，该方法的测量（计算）误差可控制在3%以内。

Error analysis of equatorial mapping method based on standard magnetic block model

Equatorial mapping is a main method for measuring and calculating the magnetic moment of satellites and their components. The test results are affected by many factors. This paper firstly introduced the basic principle of equatorial mapping (also called near-field analysis) method. The error sources of the process of measuring and calculating the magnetic moment were analyzed. Then, based on the standard magnetic block model, the influence of the magnetic eccentric distance of the standard block and the fluctuation of ambient magnetic field on the measurement error of the equatorial mapping method was studied. Meanwhile, a near and far-field gradient differential method was proposed to improve the accuracy of magnetic moment calculation. The improved method was used to measure and process the standard magnetic model. The results show that the measurement (calculation) error could be controlled within 3%.