ephemeris中文什么意思

n.
(pl. ephemerides ) 【天文学】天体位置表；星历表。

例句与用法

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To sum up , tested and validated by data sets of shenzhou iv unmanned spacecraft and precise orbit ephemeris , the algorithms presented in the thesis can improve orbit accuracy and reduce random noise considerablely . derived conclusions have important value for reference , and lay the firm technological foundation for future applications
总之，经过神舟四号飞船实测数据计算和精密星历检验，表明本文提出的各种定轨方法可以较好的提高定轨精度，减少随机噪声，所得出的结论对于实际应用具有重要的参考价值，并为将来的应用奠定了坚实的技术基础。
In the stage of the sun and the moon in sight , azimuth of the sun , the earth and the moon in the spacecraft body coordinate system is simulated . combining the simulated azimuth with the ephemeris of the sun and the moon , the state equation and observation equation are modeled . the initial orbital parameters calculated by least square method are used in orbit state equation to predict spacecraft state and to realize autonomous navigation
在日月可见阶段,模拟日、地、月敏感器测量信息,即日、地、月在航天器本体坐标系下的方位信息,结合日月星历,建立状态方程及观测方程,通过最小二乘法得到历元时刻的轨道状态初始值,将其代入轨道状态方程进行自主导航。

名词

an annual publication containing astronomical tables that give the positions of the celestial bodies throughout the year; "today computers calculate the ephemerides"