Based on satellite ephemeris and time data of the satellite coordinates of the celestial coordinate system.
根据卫星星历和时间数据计算卫星在天球坐标系中的坐标。
Devices and methods are described for determining position information without broadcast ephemeris data for extended time periods.
描述了用于对延长的时间段确定位置信息而无需广播星历数据的设备和方法。
The broadcast ephemeris, which is the basic of satellite navigation, must be precise and real time.
卫星导航定位的基础，要求有较高的精度和实时性。
The broadcast ephemeris, which is the basic of satellite navigation, must be precise and real time.
卫星导航定位的基础，要求有较高的精度和实时性。
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