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In this paper, the HDOP and VDOP of the existing and establishment satellite positioning systems are analyzed, and a better constellation configuration is determined. Then, the altitudes of satellite effects on the positioning accuracy are analyzed to search a better constellation. Thirdly, based on the analysis mentioned above and the Beidou II satellites launched, a appropriate constellation for...
In this paper a new scheme of attitude control with active magnetic torque and aerodynamic stabilization torque is proposed for low-orbit micro-satellite (orbit altitude lower than 500km), to take full advantage of environmental torque. Aerodynamic torque will be configured as stabilization torque by designing the relatively position of the center of pressure and the centroid. Simulation results show...
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