Error Model Analysis and Compensation Algorithm for Geomagnetic Signal
JI Shaokang
GAO Yanli
Abstract：The carrier of geomagnetic navigation needs real-time measurement information of the geomagnetic field for naviga?tion and positioning. However,three-axial magnetic field measuring instrument exists errors itself,the carrier's own constant mag?netic field and induced magnetic field owing to carrier's soft magnetic materials magnetized by the external magnetic field have a greater impact on real-time magnetic measurement values all. Through the analysis of three-axis magnetic measurement values,the characteristics of the spatial distribution of ellipsoid are obtained. On this basis,the compensation parameter values obtained by spe?cific experimental methods and surface fitting method of least squares adjustment. Experimental result show that the compensation scheme is effective and feasible,after calibration measurement error is significantly reduced.
Keywords：geomagnetic navigationconstant magnetic fieldinduced magnetic fieldellipsoidleast squares adjust?ment method
Publication Date：2019-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 43-47 )