卫星星座设计介绍课件.ppt

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1、A(h)：卫星脚印面积N：全球覆盖所需要的 卫星数目例如：h=1400km N12H=780km N19a：半主轴e：偏心率v：true anomaly 真近点角，表示 卫星在轨位置注：b为半短轴i：轨道面倾角 ：升节点经度 ：近地点角距注：x为春分线方向mis the Earths gravitational parameter, 398,601.2 km3/sec2.a is the orbits radiuswhere r and u are the orbits instantaneous radius and velocity.(a) 6 am view of sun-synchro

2、nous orbit from above the North Pole(b) 6 am view of sun-synchronous orbit from the suns view.不同轨道面卫星的相对位置关系：相邻轨道面的卫星经过其升节点的时间间隔相等Manhattan 网络表示、分析nconcentrates on the bounds of multiple satellite visibility by interleaving low inclination multiple planes containing few satellites and using careful phasing to fill in the gaps between satellite footprints in the same plane.n Although interleaving and careful phase alignment of planes for coverage is adopted by Globalstar to decrease the number of satellites required, it places severe constraints on inter-satellite networking,