北斗导航卫星蚀状态处理理论与方法研究

项目名称： 北斗导航卫星蚀状态处理理论与方法研究

项目编号： No.41204020

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 地球物理学和空间物理学

项目作者： 毛悦

作者单位： 西安测绘研究所

项目金额： 25万元

中文摘要： 我国卫星导航系统采用了GEO/IGSO/MEO三种卫星星座结构，对导航卫星的轨道确定技术提出了新的挑战。本项目拟针对我国卫星导航系统，开展卫星过地影阶段蚀状态处理理论与方法研究。通过对导航卫星蚀状态条件下姿态建模，分析我国导航系统卫星控制分系统频繁过地影期间"动态偏置"与"零偏置"控制策略切换对蚀状态下卫星精密定轨及URE精度的影响。分别针对三类不同轨道高度的卫星进行地影模型构建及在蚀状态判断，以期准确预报卫星过地影时刻及持续时间。针对卫星运动方程的右函数分段连续的特点，研究地影段和非地影段交界处临界区的轨道积分问题。开展单步法和多步法对分段连续右函数的实用研究。利用事后批处理长弧段定轨模式及基于自适应Kalman滤波的实时定轨模式进行卫星动力学模型性态分析及定轨方法研究，为我国卫星导航系统的建设提供重要的技术支撑。

中文关键词： 北斗；定轨；地影；卫星姿态；光压模型

英文摘要： Three kinds of satellites including GEO，IGSO and MEO are used in China's satellite navigation system 's constellation structure. This has presented new challenges to navigation satellite orbit determine technology. The project intends to carry out the processing theories and methods analysis for Beidou navigation satellite on eclipse state orbit determination. In China's satellite navigation system, gesture control strategy including "dynamic offset" and "zero offset" switches during navigation satellite frequently passes the earth eclipse through satellite control subsystems. By eclipse state gesture modeling, the influence of switch on satellite precise orbit determination and URE accuracy can be researched. Earth shadow modeling and the eclipse state judgment for the three different orbital altitude satellites will be respectively analyzed. And then the time and duration of satellite passes to shadow can be accurately predicted. For the piecewise continuous characteristics of the right function of satellite equations of motion, the orbit integration on critical area of the shadow and non-shadow junction segment will be researched. Practicality research of single step and multi-step integration methods on right function in piecewise continuous will be carried out. Using batch long arc afterwards orbit deter

英文关键词： BD2；orbit determination；earth eclipse；satellite attitude；Radiation pressure model