The broadcast ephemeris, which is the basic of satellite navigation, must be precise and real time.

导航卫星广播星历是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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The coordinates of the satellites are got according to the broadcast ephemeris received.

卫星的坐标是根据接收到的广播星历来计算的.

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Through example, analyzing positioning precise influence which broadcast ephemeris and precise ephemeris process different length baselines.

实例分析了广播星历和精密星历对于不同长度基线相对定位精度的影响.

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