力模型误差对近地卫星定轨的影响分析

本文针对近地卫星所受摄动力的特点，详细分析了大气阻尼系数、大气模式、地球重力场模型、系统性误差等对定轨的影响。利用待估大气阻尼系数及其变率，可有效地消除大气模型差的影响，提高定轨精度。在得克萨斯大学空间研究中心编制的精密定轨软件ＵＴＯＰＩＡ８６的基础上，重新编制和调试出能有效处理近地卫星定轨的实用软件。

Analysis of Effect of Dynamic Model Errors on Low Altitude Satellite

Through analyzing the characteristics of low altitude satellite disturbing force. damping coefficients of atmosphere errors and station errors and atmospheric model errors. gravity field errors are investigated and discussed in this paper. The dominant error source affecting orbit determination is defined. By way of estimating damping coefficients. the atmospheric drag model errors can be compensated. The orbit determination precision is improved. On the basis of precise orbit determination software named UTOPIA86 compiled by space research center of Texas university. the software is developed and compiled. which is suitable to process low altitude satellite.