Measurement of Magnetic Azimuth by Magnetometer and Gyroscope with Implementation of Complementary Filter

It is possible to measure magnetic azimuth relatively easily with the usage of one magnetometer. However, the precision of the measurement is limited by accuracy of calibration of the used sensor and the uncertainty of the very magnetometer. In order to achieve more precise results, the acquired data from magnetometer can be combined together with data from another sensor. For this purpose it is possible to use appropriate digital filter, e.g. complementary filter. The aim of this article is to introduce method of measuring magnetic azimuth by applying the complementary filter, which is able to improve the accuracy of measurement.