利用UKF滤波定轨算法，明显提高了自主定轨的精度。
Based on UKF the precision of autonomous navigation was improved obviously.
本文最后还特别指出了文中建立的几何定轨算法具有工程实用价值。
At the end of paper, it is pointed out that this new model and algorithms can be used to determine a satellite orbit in engineering.
光电人卫跟踪仪的观测数据是对已知或未知轨道卫星进行定轨的重要参数。
The tracker's observed data are important parameters to determine the precise orbits of those orbit-known or unknown satellites.
全球重力场的精确测量对于地球物理学、卫星定轨等均有至关重要的意义。
The global gravity field precision measurement is important to geophysics, the satellite orbit etc.
研究了影响导航定位精度的关键技术问题，如时间基准、时间同步和卫星定轨等。
In this paper, we analyze the key techniques for the service precision of Global Navigation satellite System such as time reference, time synchronization, satellite orbit determination, etc.
计算结果表明，使用经各种误差修正后的测速数据参与初轨计算能有效提高定轨精度。
The result shows that using velocity measuring data after error correction in preliminary orbiting computation can effectively improve the orbit determination precision.
为了使航天测控中星箭分离后得到的数据能够在定轨时获得应用，提出了一种修正方法。
To use the data after separation of satellite and rocket in the process of calculating orbit, a correction method is proposed.
本文针对高轨道密度光碟机的寻轨伺服与定轨伺服控制问题，提出一个系统化的设计方法。
This paper presents a systematic method for the design of track seeking and following servo controller of high track density optical disk drive.
卫星精密定轨中，需要计算天球坐标系(CRF)到地球固联坐标系(TRF)之间的转换。
For precise satellite orbit determination, the transformation should be done between the Celestial Reference Frame (CRF) and the Terrestrial Reference Frame (TRF).
在GPS静态定位和动态定轨中，GPS数据预处理质量的好坏都直接影响着GPS定位精度。
The quality of GPS data pre-processing is the key to improve GPS positioning precision in either GPS static positioning or dynamic POD.
通过算例验证发现，存在定轨误差的情况下，部分变量瞄准法能精确地瞄准任务所关心的变量。
This paper gives the partial variable aiming method to satisfy some of the final-time constraints. Numerical simulations show that partial variable aiming method can aim concerned variables.
研究在不依赖于GPS差分基准站的情况下，利用单频gps接收机对低轨卫星进行定轨的算法。
This paper studies the orbit determination of LEO satellites using GPS receivers of single frequency in condition of not depending on GPS differential reference stations.
基于定轨误差、轨道控制误差和轨道预报误差的调相时间分析，制定了目标飞行器调相控制策略。
Based on the target's phasing time analysis of orbit determination error, orbit control error and orbit prediction error, the strategy of the target's phasing orbit maneuver was developed.
用人造地球卫星轨道计算的测速定轨方法，去拟合火箭飞行弹道的自由段，取得了比较满意的结果。
The result is satisfactory by using a method of the artificial earth satellite orbit determination from range rate observations to fit the free-flight trajectory of rocket.
实测数据的计算结果表明，新的定轨方法可以实时自主地得出卫星轨道的位置，并能达到较高的定轨精度。
The experiment result with real measurement shows that the new method can be used in real time autonomous satellite orbit determination with high accuracy.
空间碎片的观测精度将会直接影响到空间碎片的定轨精度，因此对空间碎片观测精度进行判定是有重要意义的。
The observational accuracy of the space debris will affect their orbit determination accuracy, so it is especially vital for us to determinate the observational accuracy of the space debris.
低轨重力卫星轨道的精确确定是获得精密地球重力场模型的前提，而精密重力场模型又是获得高精度定轨结果的保证。
On the other hand, the precision gravity model is important guarantees for obtaining high precision orbiting results using the dynamic or reduced-dynamic orbit determination method.
重点考察了月球重力场误差、观测量精度、初始时刻的先验轨道误差以及观测资料类型等对环月飞行器定轨精度的影响。
Especially, the effects of lunar gravity, observation accuracy, orbital error and observation data types on the orbital determination accuracy of the lunar orbiter have been carefully investigated.
针对卫星精密定轨过程中观测资料存在粗差以及观测资料的合理定权问题，将抗差方差分量估计引入到卫星精密定轨中。
In this paper, the robust variance component estimation is introduced into the satellite orbit determination to resist the effects of outlying observations and to determine the weights.
通过对这些方法进行的大量模拟计算和分析，结果表明作为双星定位系统的一种潜在功能，用其对中低轨卫星定轨是可行的。
A great lot of simulations and analysis are given, it shows that determining the LEO or MEO satellite orbit using this system is practicable.
对双星定位系统在中低轨卫星轨道确定中的应用做了详细的分析，给出了在该系统的测量模式下中低轨卫星定轨的几种方法。
The application of Bi-satellite positioning system to LEO or MEO satellite orbit determination be analyzed and discussed some corresponding orbit determination methods.
对影响导航定位系统定位精度的各种因素进行了分析。研究了影响导航定位精度的关键技术问题，如时间基准、时间同步和卫星定轨等。
In this paper, we analyze the key techniques for the service precision of Global Navigation satellite System such as time reference, time synchronization, satellite orbit determination, etc.
在这些模型中并没有一种在任何情况下都是最好的，因此，对于特定轨道选择合适的大气密度模型对提高定轨预报的精度是非常重要的。
Therefore, it is very important to choose an appropriate atmospheric density model for a specific orbit to improve the accuracy of orbit forecast.
卫星激光合怍目标技术是卫星激光测距系统的重要组成部分，广泛应用于导弹、人造卫星和月球等激光测距系统中，是实现高精度测距和精密定轨的关键技术。
Laser cooperative targets is an important instrument of satellite laser ranging system, and has been applied widely in laser range system of missiles, man-made satellite and moon, etc.
本文基于美国Gamit软件研究的基础上，对于GPS实时精密轨道确定的方法进行了细致的研究，提出了在中国区域范围内有实用价值的区域定轨方法与方案。
Based on research of GAMIT software, the GPS orbit determination method were studied and discussed. This paper gives a valuable strategy for regional orbit determination in China.
本文的主要目的是利用形状记忆合金的特性控制在轨天线的热变形，以此来保证天线的精度在一定的范围之内。
The objective of this article is mostly using characteristic of Shape Memory Alloy (SMA) to control the thermal deformation of antenna at orbit, ensuring the precision of antenna in a certain range.
杂谈托链轮、支重轮、驱动轮及轨链节等，在长时间的运转过程中，会出现一定程度的磨损。
Entrusted sprocket, supporting wheels, wheel and rail links and so on, in the long running process, there will be a certain degree of wear and tear.
通过此研究的结果对共轨喷油器结构参数的选取和优化具有一定的参考价值。
The obtained results can be used in the common rail injector optimization and design.
拦截器在飞行过程中轨控推力以持续定常方式或小脉冲方式施加在垂直视线的方向，目标具有一定的机动能力。
The interceptor had sustain constant thrust or impulsive thrust perpendicular to the line-of-sight during the flight, and the target was maneuverable.
拦截器在飞行过程中轨控推力以持续定常方式或小脉冲方式施加在垂直视线的方向，目标具有一定的机动能力。
The interceptor had sustain constant thrust or impulsive thrust perpendicular to the line-of-sight during the flight, and the target was maneuverable.
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