ephemeris

1. Research on interpolation method for IGS precise ephemeris and clock bias
   IGS精密星历和钟差插值方法的研究
2. When their orbit eccentricity or inclination are near zero, some problems may occur when the GPS Kepler orbit elements fitting method is applied to fit their broadcast ephemeris parameters.
   导航卫星一般采用近圆轨道，当卫星轨道偏心率或者轨道倾角接近于零时，利用GPS卫星开普勒轨道根数拟合卫星广播星历会出现一些问题。
3. Effect and Analyse of Broadcast Ephemeris Errors on GPS Survey Precision
   卫星星历误差对GPS定位精度的影响与分析
4. 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。
5. Application of Generalized Extended Interpolation Method in Precise Ephemeris Interpolation
   广义延拓插值在卫星精密星历插值中的应用
6. It also shows that the variety laws of the fitting result of broadcast ephemeris for MEO and IGSO satellites are similar to each other and are different to GEO satellites.
   MEO和IGSO卫星在一个轨道周期内星历参数拟合结果的变化规律相近，但是与GEO卫星的差异较大。
7. A Novel Wide Area Differential Method on Separated Calculation of Satellite Clock Errors and Ephemeris Errors
   星钟和星历误差分离的广域差分新方法
8. Ephemeris table computation synchronous satellite
   星历表计算同步卫星
9. Using the precise ephemeris and the precise satellite clock correction can realize the precise point positioning ( PPP).
   精密单点定位的实质就是利用精密星历和精密卫星钟改正来实现定位。
10. The Effect of Different Ephemeris on the Exactness of GPS Data Processing airborne ECM set for self defence
    不同卫星星历对GPS数据处理的影响
11. 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。
12. Evaluation Analysis on GPS Broadcast Ephemeris Parameters Based on the Ephemeris Fitting
    基于星历拟合的GPS广播星历参数评估分析
13. The Interpolation Methods for Satellite Coordinate and Clock Offset Based on IGS Precise Ephemeris
    基于IGS精密星历的卫星坐标和钟差插值
14. Influence of solar activity on GPS broadcast ephemeris
    太阳活动对GPS卫星广播星历的影响
15. Based on the GPS broadcast ephemeris parameters, the nonlinear least square fit algorithm of broadcast ephemeris parameters was developed, and the relevant calculation formulas were derived.
    基于GPS广播星历参数，研究了导航卫星广播星历参数的非线性最小二乘拟合算法，并推导了相应的计算公式。
16. The application of IGS Ultra-rapid ephemeris in high-precision real-time GPS survey
    基于IGS超快速星历的高精度实时GPS测量
17. The Engineering Design for Broadcast Ephemeris Parameters Fitting Arithmetic and Their Interfaces
    工程化广播星历参数拟合算法与接口设计
18. In his free time, Banneker wrote the pennsylvania, delaware, maryland, and Virginia almanac and ephemeris.
    闲暇之时，班尼卡撰写有关宾州、德拉瓦、马里兰和维吉尼亚的农民历及星象历书。
19. Comparison of Broadcasting Ephemeris and Precise Ephemeris on GPS Baselines Processing
    广播星历和精密星历解算GPS基线成果的比较分析
20. Application of IGU ephemeris to mountain-based GPS obscuration prediction
    IGU星历在山基GPS掩星预报中的应用
21. Comparison of GPS Orbit Interpolation Method Based on Precise Ephemeris
    GPS精密星历的轨道内插方法比较
22. Study and analysis on ephemeris error in double-star positioning system
    双星定位系统中星历误差的分析与研究
23. 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。
24. Precision Analysis on Orbit and Clock of GPS Satellites Broadcast Ephemeris
    GPS系列卫星广播星历轨道和钟的精度分析
25. 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。
26. 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。
27. The influence of broadcasting ephemeris error is estimated from the satellite-station double difference technology.
    首次采用星站双差分技术试验研究GPS卫星广播星历误差影响值，推导了星站双差解析模型；最后，进行了试验和技术分析。
28. The impact of the fitting and interpolation methods of ephemeris on the result of differential positioning is intensively analysed.
    分析了星历插值与拟合的卫星坐标对差分定位结果的影响。
29. The precision of IGR ephemeris and IGU ephemeris is analyzed through IGS precise ephemeris.
    以IGS精密星历为基础，分析了IGR星历和IGU星历的精度。
30. Meanwhile, we need the GPS satellite ephemeris to be more accurate.
    同时，也对GPS卫星星历的精度和实时性提出了越来越高的要求。

noun

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