Orbital design methods of satellite constellations 并列题名：Orbital design methods of satellite constellations Theory and design of satellite constellations Digital design methods of railway location Legal aspects around satellite constellations 并列题名：Theory and design of satellite constellations 并列题名：Legal aspects around satellite constellations 并列题名：Digital design methods of railway location Fusion theory and methods for satellite state estimation. Fundamentals of satellite communication