| Summary: | 碩士 === 淡江大學 === 機械與機電工程學系碩士班 === 97 === The main purpose of this thesis is to investigate the advantages of communication link between the satellites in a constellation. Discussions on both the weather observation and communication constellations about the performance improvements after adding inter-satellite links between satellites have been presented in detail. In weather observation constellation with inter-satellite links design, a 18/18/4 Walker constellation with circular orbit at 837km attitude and 60o inclination can increase the time and frequency for downloading satellite weather images drastically. Weather images can be transferred back to Taiwan station almost in real time. In communication constellation satellite with inter-satellite links design, we use the circular orbits at 800km attitude. For continuous coverage of an area centered at Taiwan with radius of 2000km, a 36/9/0 Walker constellation with orbit inclination at 35o has been designed. Three cases have been studied: the horizontal inter-satellite links, to add the vertical inter-satellite links, and to combine horizontal and vertical inter-satellite links. It is concluded that we can make a communication constellation to become satellite communication web. We then calculate the azimuth, elevation and distance between the two links satellites by using STK. The data can be applied in the tracking system design such as the satellite’s antenna and the power adjusting of the satellite’s transmitter.
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