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1·The scheme can anticipate user's location by using ephemeris message.

该策略利用了星历信息的确定性来预计用户的位置。

2·The GPS Forecasting ephemeris is usually used to predict GPS satellite distribution.

GPS预报星历常用来预报未来一段时间内GPS卫星的分布情况。

3·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。

4·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。

5·We have to acquire the following tools to work with: an ephemeris for the year the horoscope is to be made.

我们必须在工作中使用“工具”，出生那年的一个星历表。

6·Position of the GPS receiver can be precisely calculated in the case of being short of an effective ephemeris.

接收机位置计算装置，用于根据卫星的精确位置计算所述接收机的位置。

7·The GPS ephemeris and GLONASS ephemeris adapt to some kind of the satellite orbits while they have some shortcoming.

GPS和GLONASS广播星历形式适合于某一类卫星轨道，但存在一定局限性。

8·This paper discusses the essential method of using GPS pseudorange data to assess the precision of broadcast ephemeris.

论述了GPS监测站伪距观测量评定广播星历精度的基本方法。

9·Ephemeris error is one of the most important factors which affect positioning precision when satellite navigation was used.

广播星历误差是影响卫星导航用户定位精度的重要因素之一。

10·A fast design method for the lunar satellite transfer trajectory is presented by combining patched conic technique and ephemeris.

提出了一种将圆锥曲线拼接法与历表相结合，快速设计月球卫星地月转移轨道的方法。

(1)broadcast ephemeris广播星历；广播天文历

(1)precise ephemeris精密星历表；精确星历表