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LEO satellite communication systems and LEO satellite navigation systems are imperative in various fields. Therefore, a method to design hybrid LEO constellation for communication and strengthen the capability of navigation is proposed in this paper, which takes coverage capability and precession into consideration. Firstly, the methods of selection of constellation parameters, such as altitude, inclination,...
The construction of a navigation system plays an important role in the development of national politics, economy and military affairs. Nowadays, the Beidou navigation system is facing a transition period from the regional navigation system to the global one. For the global constellation, the system performance will not be seriously degraded when one or two satellites are invalid, but it is out of...
The conventional GPS receivers provide the least user flexibility. It is necessary to have software GPS receivers for easy implementation, simulation and analysis of algorithms. Additionally, a GPS software receiver is more flexible when it comes to adapting the entire receiver to work on the near future Galileo signals. In this software receiver design, the focus is on the baseband signal processing...
The purpose of this paper is to present a method of precise navigation and velocity determination for GRACE formation flying satellites-which integrates the onboard accelerometer data, K-band range measurements and IGS GPS precise ephemeris data into the processing filter to estimate the position and velocity of the formation flying spacecrafts simultaneously. The accuracy of force models acting on...
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