| 基于整周模糊度概率特性的GPS基线质量评估 |
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| 引用本文： | 徐锐,黄丁发,李成钢,周乐韬.基于整周模糊度概率特性的GPS基线质量评估[J].西南交通大学学报,2007,42(6):739-742,747. |
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| 作者姓名： | 徐锐 黄丁发 李成钢 周乐韬 |
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| 作者单位： | 西南交通大学空间信息工程中心,四川,成都,610031 |
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| 基金项目： | 国家自然科学基金资助项目(40271091)，教育部博士点基金资助项目(20040613025)，教育部优秀教师资助计划(2003109) |
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| 摘 要： | 为简化GPS基线质量评估,给出了基线固定解概率分布的严密形式,并用仿真方法分析了积分区域、模糊度浮点解的精度、基线浮点解的精度以及2种浮点解的相关系数对GPS基线质量改进的作用.试验表明,模糊度浮点解和基线浮点解的精度以及二者的相关系数均是影响基线质量的重要因素,模糊度浮点解和基线浮点解的精度对基线质量的改进作用是"积极"的,而二者的相关系数对基线质量的改进作用则相反.
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| 关 键 词： | GPS 基线质量评估 概率特性 数值分析 |
| 文章编号： | 0258-2724（2007）06-0739-05 |
| 收稿时间： | 2006-11-16 |
| 修稿时间： | 2006年11月16 |
Evaluation of GPS Baseline Quality Based on Probabilistic Characteristic of Integer Ambiguity |
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| XU Rui,HUANG Dingfa,LI Chenggang,ZHOU Letao.Evaluation of GPS Baseline Quality Based on Probabilistic Characteristic of Integer Ambiguity[J].Journal of Southwest Jiaotong University,2007,42(6):739-742,747. |
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| Authors: | XU Rui HUANG Dingfa LI Chenggang ZHOU Letao |
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| Abstract: | To simplify the evaluation of GPS(global positioning system) baseline quality,a closed-form probability density function(PDF) of fixed GPS baseline solution was presented,and the effects of some factors influencing the PDF of fixed GPS baseline solution,such as the integral region of the PDF,the precision of ambiguity float solution,the precision of baseline float solution and the correlation coefficient of the two solutions,on the improvement of GPS baseline quality were discussed through numerical analyses.The experimental results show that the precisions and correlation coefficient of the ambiguity float solution and the baseline float solution have a great effect on GPS baseline quality,and the precisions of the two solutions have a positive effect on the improvement of GPS baseline quality,while their correlation coefficient has a negative effect. |
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| Keywords: | GPS evaluation of baseline quality probabilistic characteristic numerical analysis |
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