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orbit determination error 轨道预计误差
The refraction error is a main error source in the measurementdata.It is also a main factor affecting the satellite tracking and control accuracy and orbit determination accuracy. 摘要折射误差是观测数据包含的主要误差源之一，也是影响卫星跟踪与控制以及轨道确定精度的主要因素。
The error sources in GPS-based orbit determination and the accuracies of GPS satellite ephemerides are analyzed. The usage of GPS clock offsets in GPS-based orbit determination is discussed. 分析了星载GPS定轨的误差源及IGS所提供的星历的精度，研究了GPS卫星钟差在星载GPS低轨卫星定轨中的应用问题。
The mathematic model of orbit determination of GPS satellite using zero-difference data is deduced in detail. 详细推导了利用非差伪距和非差相位确定GPS卫星轨道的数学模型；
MOYER T D.Mathematical Formulation of the Double-precision Orbit Determination Program[R].[s.l.]:[s.n.],1971. 李济生.;人造卫星精密轨道确定
VLBI monitoring system worked well during the orbit determination of theChang'E-1 Lunar Probe. VLBI台站监管系统在嫦娥探月一期工程实施期间运行稳定、可靠，对VLBI测轨任务的圆满完成起到了积极的作用。
The determinable error in plate counting method is larger. 平板计数法费时且误差较大。
GPS-based orbit determination is nowadays one of the hotspots in satellite geodesy studies. 星载GPS定轨是目前卫星大地测量研究的热点之一。
RESULTS Revulsion is obvious and easy to determine error is small. 结果测定终点突跃明显,终点容易判断,误差较小。
An autonomous satellite attitude and orbit determination system based on the stellar refraction measurement is described. 摘要研究了基于星光折射量测进行自主确定卫星姿态及轨道的方法。
Positive rate of EL TOR Vibrio cholerae by usual proliferation method was low, determination error of false negative sample was easy to occur. 霍乱弧菌的检测。采用常规的浓缩蛋白胨水增菌法检出率低,容易造成假阴性。
After comparison with overlay pass, other ephemeris and propagation, it was analyzed the orbit determination and propagation accuracy of LP. 通过重叠弧段比较、外部星历比较以及预报比较,我们分析了LP的定轨和预报精度。
Autonomous orbit determination of navigation constellation plays an important role in increasing autonomy of constellation. 实现导航星座的自主定轨对提高星座自主性具有主要意义。
Unable to determine error that occurred trying to run command upfunpack. 怎么解决这个错
Several individual and combined techniques including BRTS,VLBI,CEI and GPS are presented and analyzed for tracking and orbit determination for geostationary satellites. 介绍并分析了针对地球静止卫星的各种高精度测定轨跟踪技术。
The definition, characteristics and mathematical model of pseudo-stochastic pulses utilized in reduced-dynamic orbit determination are systematically analyzed. 摘要研究了简化动力学定轨方法中伪随机脉冲的定义、特征及估计的数学模型。
The problems encountered when using Kalman filter for satellite precise orbit determination are discussed.And a new nonlinear adaptively robust filter is proposed. 摘要讨论了应用卡尔曼滤波进行卫星精密定机所遇到的一些问题，提出了一种新的非线性自适应抗差滤波定轨算法。
The experiment result with real measurement shows that the new method can be used in real time autonomous satellite orbit determination with high accuracy. 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。
And a novel method via initial determined error compensation is presented in order to reduce the influence of shop motion and lever-arm effect. 并提出了采用初始装定误差补偿的方法消除船舶运动与杆臂效应对射击的影响。
By titration directly with nitric thorium, the discoloration of end point is not sensitive and the determination error is sizable and not suitable to determine phytate content. 而采用直接滴定法检测则终点变色不敏锐，测定误差较大，不适合于植酸含量的分析。