轨道预报

EOP预报误差对导航卫星轨道预报的影响分析

Influence of EOP Prediction Errors on Orbit Prediction of Navigation Satellites

卫星轨道预报三维视景仿真混合编程

Satellite Orbit Prediction 's Visual Simulation By Using Mixed-language Programming

本论文将卫星轨道预报技术和计算机仿真技术相结合，提出了基于GIS控件建立卫星在轨运行仿真平台的设计思想。

In this thesis the idea of building a simulation platform of satellite in orbit based on GIS control is present , combining the orbit predict technology and computer simulation technology .

本文具体工作包括：首先，分析了NORAD双行元轨道预报模型，并给出了模型分类和执行效率比较。

This paper includes three aspects as following : First , the NORAD two-line element orbital forecast models are analyzed . The classification and implementation efficiency of the models are presented .

载人飞船阻尼摄动模型和轨道预报精度

Drag Perturbation Model and Orbit Prediction Accuracy of Manned Spacecraft

厘米级卫星测距技术及其卫星轨道预报

Satellite Range With Accuracy of Centimeter and Orbit prediction

空间碎片轨道预报筛选策略研究

Orbit Prediction and Filtration Strategies of Space Debris

卫星轨道预报技术是与卫星通信及卫星回收的关键技术。

Satellite orbital prediction technology is a key technology for satellite communication and satellite recovery .

本文将对人造地球卫星轨道预报中的主要问题作一概括；

This paper first sums up the main problem about orbit prediction of an artificial earth satellite .

该平台可用于卫星轨道预报的地面测试及分析，应用数据库技术进行卫星及观察站点的管理。

Database is used to manage the satellites and position of observers . This platform is applied for ground test and analysis of orbital prediction .

采用历元状态滤波建立了星上自主中长期轨道预报方法，并以太阳同步轨道卫星为例对算法进行了仿真验证。

The on-board autonomous term orbit prediction is built according to epoch state filter . And sun-synchronous orbit satellites are taken as examples for the simulation .

并分析了基于阻力等效参数估计法预报精度较低的原因，对此提出了相应的提高轨道预报精度的解决方案。

And analyzed the reason of the bad prediction precision of equivalent drag parameters estimation scheme , then proposed the solution accordingly to improve the orbit prediction precision .

计算结果表明，返回制动开始点的轨道预报精度提高了一个量级，这说明模型的建立对于解决轨道舱泄压扰动的影响是合理有效的。

It shows that the precision of orbit prediction is enhanced by over an order of magnitude , indicating that the model is a reasonable solution to the deflation process .

该算法在不影响精度的情况下忽略卫星轨道预报算法的高阶摄动项，节省了软件存储量；同时用改进的搜索算法，大大缩短了过顶时间段的搜索时间。

Some high ranked perturbations are neglected to take up less memory while the accuracy is not affected , and the improved algorithm is applied to shorten the search time during the covering .

设计了基于历元状态滤波的轨道预报方案，以太阳同步轨道为例生成基准轨道，并进行了双行元修正和中长期轨道预报仿真。

An orbit prediction program based on epoch state filter is designed . Then sun-synchronous orbit is taken as an example to generate the base track , amend two-line elements and predict medium and long term orbit .

提出了利用GPS导航数据片段和SGP4模型进行航天器轨道自主预报的方法。

The autonomous prediction of spacecraft orbit based on GPS navigation data segment and Simplified General Perturbations Version 4 model is put forward .

提高低轨道卫星预报精度的一个方法

A Method to Improve the Accuracy of Low Orbit Satellite Prediction

时间序列分析在轨道交通客流预报中的应用研究

Application Research of time series analysis on passenger flow forecast of rail transit

最后，对基于阻力系数估计法和等效阻力参数估计法的轨道确定与预报方案进行了详细的比较。

Finally , the orbit determination and prediction schemes are compared between drag coefficient estimation method and equivalent drag parameters estimation method in detail .

在卫星导航系统中，卫星精密轨道改进和精确预报是影响卫星导航系统性能的重要因素。

In the satellites navigation system , precision orbit determination and accurate prediction of satellites orbit are important factors that affect the performance of .

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 .

本文针对空间碎片碰撞预警分析中有关轨道筛选策略和轨道预报计算方法内容进行研究，所获得的研究成果将直接应用于上海航天局的基于网络的空间环境预报数据库中的碎片环境子系统。

The paper is study about maneuver of orbit filtration and orbit predict in Space Debris Collision Prediction Analysis . Its result is directly applied to environment subsystem about space debris , it roots in a project of prediction database based on network from spaceflight office of shanghai .

并对该方案进行了仿真验证，研究了低轨道航天器区域导航的轨道预报效果。

Then the program is simulated in order to study the effect of the low-orbit spacecraft orbit prediction .

可直接用于制导，实时轨道计算，卫星轨道短期预报等。

It may be used in guidance , onboard orbit computation , and short term forecast of satellite orbit .

自主星历更新是导航星座自主导航的关键技术之一，包括卫星轨道精密确定和轨道短时预报两个方面的内容。

The autonomous updating of the navigation ephemerides is one of the key techniques for the autonomous navigation of navigation constellation . It includes two studying aspects , the precise determination and short-time prediction of the navigation satellite orbits .

轨道外推与坐标系转换贯穿于轨道改进和预报整个过程中，直接影响导航电文的精度，因此有必要针对轨道外推和坐标系转换对精密定轨及轨道预报的影响进行研究。

The navigation systems . Orbit extrapolation and reference frame conversion throughout the entire process of orbit determination and prediction , and is the direct impact on the results of precision .

在综合卫星的轨道计算、覆盖区域推导与地图投影的基础上，设计了基于二维实时动态显示技术的卫星轨道预报仿真平台。

And by integrating the orbital calculation of satellite , coverage and map projection , a simulation platform for satellite orbital prediction is designed .

要提高预报轨道拟合的精度，关键是要对摄动力简化特别是地球引力摄动高阶项的截断以及日月引力场简化造成的轨道预报精度损失加以控制。

M. Therefore controlling the precision loss of orbital prediction cased by the simplification of models of perturbation force , especially by the truncation of high order terms of Earth gravitational perturbation and simplification of models of Sun and lunar gravitational fields can improve the fitting precision of prediction orbit .