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由星载GPS数据进行CHAMP卫星定轨和地球重力场模型解算

卫星定轨是卫星任务顺利执行的关键,而地球重力场是低轨卫星受力的主要来源,对卫星的跟踪观测提供了更多的地球重力场信息,地球重力场模型精度的改善也提高了卫星定轨的精度。因此,卫星定轨和地球重丈场模型研究是相辅相成的。CHAMP是用于地球科学和大气研究及其应用的德国小卫星,其任务之一就是高精度地确定全球静态地球重力场长波长特征和重力场的时间变化规律。为此,需要由星载GPS数据进行CHAMP卫星的精密定轨。围绕着这些国际地学研究热点,本文的工作和创新点主要有:1.回顾了重力测量和卫星重力探测技术的发展和应用,阐述了描述低轨卫星状态的直角坐标、Kepler根数、Hill根数和Equinoctial根数之间的相互关系,认为Hill根数和Equinoctial根数能够避免由卫星轨道奇异带来的计算问题,分析了低轨卫星的受摄运动,给出了摄动模型。2.根据卫星运动微分方程和卫星跟踪观测量,探讨了卫星定轨问题,分析了卫星轨道积分的分析法和数值法,推导  (本文共201页) 本文目录 | 阅读全文>>

《Geo-Spatial Information Science》2008年03期
Geo-Spatial Information Science

改进的能量守恒方法及其在CHAMP重力场恢复中的应用(英文)

An efficient method for gravity field determination from CHAMP orbits and accelerometer data is referred to as the energy balance approach. A new CHAMP gravity field recovery strategy based on the im-proved energy balance approach is developed in this paper. The method simultaneously solves the spherical harmonic coefficients, daily integration constant, scale and bias parameters. Tw...  (本文共6页) 阅读全文>>

《Geo-Spatial Information Science》2006年03期
Geo-Spatial Information Science

High Precision Orbit Determination of CHAMP Satellite

The precision orbit determination of challenging minisatellite payload(CHAMP) satellite was done based on position and navigation data analyst(PANDA) software which is developed in Wuh...  (本文共7页) 阅读全文>>

《Geo-Spatial Information Science》2005年03期
Geo-Spatial Information Science

Evaluation of CHAMP Satellite Orbit with SLR Measurements

The technique of Evaluating CHAMP satellite orbit with SLR measurements is presented. As an independent evaluation of the orbit solution, SLR data observed from January 1 to 16, 2002 are processed to compute the residuals after fixing the GFZ's post scie...  (本文共5页) 阅读全文>>

《Journal of China University of Geosciences》2004年03期
Journal of China University of Geosciences

Modeling and Interpreting CHAMP Magnetic Anomaly Field over China Continent Using Spherical Cap Harmonic Analysis

Based on the CHAMP Magsat data set, spherical cap harmonic analysis was used to model the magnetic fields over China continent. The data set used in the analysis includes the 15′×15′ gridded values of the CHAMP anomaly fields (latitude φ=25°N to 50°N and longitude λ=78°E to 135°E). The pole of the cap is located at φ=35°N and λ=110°E with half-angle of 30°. The maximum index (K max) of the model is 30 and the to...  (本文共6页) 阅读全文>>

《法语学习》2004年05期
法语学习

Aventures à Paris (2): A deux pas de la mort et les feux follets

Hurluberlus ,commentosez vousenvahirnotreterritoire ?Vousvoulezencorevivre ? Unhomme ,gigante...  (本文共5页) 阅读全文>>