Study on the Determination of Attitudes and Orbits of Micro-satellites only by 3-axis Magnetometer

3rd International Conference on Aeronautical Materials and Aerospace Engineering

航空航天工程

Jang, MyongChol^1

Automation Institute, State Academy of Sciences, Pyongyang City, Korea, People's Democratic Rep^1

关键词: Angular rate;    Attitude determination;    Linear Kalman filters;    Orbit determination;    Orbit information;    Position determination;    Unscented Kalman Filter;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/608/1/012047/pdf
DOI  :  10.1088/1757-899X/608/1/012047

学科分类：航空航天科学

来源: IOP

【 摘 要 】

This paper explains a method to determine the attitude and orbit only using onboard magnetometer. This method, only using 3-axis magnetometer, makes it efficient and possible to get the attitude and orbit information, without high-priced and complicated sensors. This method comprises 2 parts-one is the attitude determination and the other is the orbit determination by the magnetometer. In the attitude determination, 2-stage filter (Linear Kalman filter and Unscented Kalman filter) is applied and in the orbit determination, the Extended Kalman filter. The attitude determination accuracy is below 1°, the attitude angular rate determination accuracy below 0.005°/s and the orbital position determination accuracy below 10 kms when the measurement error of magnetometer is about 200nT. Thus, this study contributes to the mission of the micro satellites.