The application of attitude change information in magnetic interference component suppression

摘要

Magnetic interference is one key factor reducing the vector measurement accuracy of geomagnetic field measurement instrument, where scalar suppression algorithm is ineffective. A convenient component suppression method is proposed to avoid complex equipments and strict operations in previous component methods. The key factor is to overcome the problem that additive unknown parameters are added when attitude changes. System attitude change information is proposed for component suppression, where the attitude change is provided by inertial navigation system (INS). After suppression, magnetic interference of north, vertical and east direction are suppressed to 2.1%, 4.28% and 2.53% respectively. It provides a new and convenient way to improve the accuracy of geomagnetic field vector measurement. (C) 2020 Published by Elsevier Ltd.