Evaluation of GPS Baseline Quality Based on Probabilistic Characteristic of Integer Ambiguity
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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.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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Key words:
- GPS /
- evaluation of baseline quality /
- probabilistic characteristic /
- numerical analysis
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TEUNISSEN P J G.The probability distribution of the GPS baseline for a class of integer ambiguity estimators[J].Journal of Geodesy,1999,73(5):275-284.[2] TEUNISSEN P J G.The probability distribution of the ambiguity bootstrapped GNSS baseline[J].Journal of Geodesy,2001,75(5):267-275.[3] 李庆海,陶本藻.概率统计原理和在测量中的应用[M].北京:测绘出版社,1990:8-15.[4] TEUNISSEN P J G.On the integer normal distribution of the GPS ambiguities[J].Artificial Satellites,1998,33(2):1-13.[5] VERHAGEN S.On the approximation of the integer least squares Success rate:which lower or upper bound to use?[J].Journal of Global Positioning Systems,2003,2(2):117-124.[6] TEUNISSEN P J G.Success probability of integer GPS ambiguity rounding and bootstrapping[J].Journal of Geodesy,1998,72(10):606-612.[7] TEUNISSEN P J G.The least-squares ambiguity decorrelation adjustment:a method for fast GPS integer ambiguity estimation[J].Journal of Geodesy,1995,70(1):65-82. -
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