| GPS定位中对流层折射率随机模型的研究 |
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| 引用本文： | 邵占英,葛茂荣,刘经南.GPS定位中对流层折射率随机模型的研究[J].大地测量与地球动力学,1996(2). |
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| 作者姓名： | 邵占英 葛茂荣 刘经南 |
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| 作者单位： | 国家地震局地震研究所，武汉测绘科技大学 |
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| 基金项目： | 国家自然科学基金,地震科学联合基金,国家地震局第一地形变监测中心的资助 |
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| 摘 要： | 分析了ＧＰＳ相对定位中对流层折射的特点，概述了目前所采用的几种确定性参数对流层折射估计和随机过程参数对流层折射估计方法。根据实测数据处理结果，分析比较了几种确定性模型和随机过程模型对ＧＰＳ相对定位精度的改善作用。结果表明：对流层折射的多参数确定性模型和随机参数模型对基线分量的重复性，特别是高程分量的重复性有明显改善；在大多数情况下，尤以随机参数模型为佳，其垂直分量的重复性精度较单参数模型可提高一倍左右。
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| 关 键 词： | 全球定位系统，随机模型，对流层折射 |
RESEARCH ON IMPROVING THE ACCURACY OF VERTICAL COMPONENT OF GPS NETWORK BY USING STOCHASTIC ESTIMATION FOR TROPOSPHERIC REFRACTION |
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| Shao Zanying.RESEARCH ON IMPROVING THE ACCURACY OF VERTICAL COMPONENT OF GPS NETWORK BY USING STOCHASTIC ESTIMATION FOR TROPOSPHERIC REFRACTION[J].Journal of Geodesy and Geodynamics,1996(2). |
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| Authors: | Shao Zanying |
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| Abstract: | In this paper,the determinant parameter and stochastic process methods for tropospheric refraction estimation are described after analyzing the characteristics of tropospheric refraction in GPS relative positioning. Data observed in six day are processed to evaluate the roles of the methods in the improvement of GPS relative positioning precision.The results indicate that the repeatabilities for baseline components are improved with the multi-parameter and stochastic process methods, especially for the vertical component.In most situation the best repeatabilities are obtained with the stochastic process method.The repeatabilities in vertical direction are 1 time higher than those obtained with single parameter model. |
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| Keywords: | GPS Stochastic model tropospheric refraction |
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