| 基于正则化的GPS/BDS单频单历元模糊度固定 |
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| 引用本文： | 王静,赵兴旺,刘超,张翠英.基于正则化的GPS/BDS单频单历元模糊度固定[J].大地测量与地球动力学,2016,36(12):1083-1088. |
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| 作者姓名： | 王静 赵兴旺 刘超 张翠英 |
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| 摘 要： | 针对单频单历元模糊度固定中的秩亏问题，给出一种基于双差载波系数阵奇异值分解的正则化方法。通过对坐标改正参数进行约束，改善法矩阵的病态性，并结合LAMBDA方法实现单历元模糊度固定。采用长度不同的两组GPS/BDS基线数据进行单频单历元模糊度解算，并与选权拟合法比较。结果表明，采用该方法，5.8 m基线BDS系统模糊度解算成功率提高17.61%，2.34 km基线GPS、BDS及GPS/BDS模糊度解算成功率分别提高4.67%、3.56%和3.63%。当截止高度角为10°时，E、N方向定位精度达到mm级，U方向达到mm至cm级。
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| 关 键 词： | 单频单历元 正则化 GPS/BDS 模糊度固定 |
Single-Frequency Single-Epoch Ambiguity Resolution for Combined GPS/BDS Based on Regularization |
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| WANG Jing,ZHAO Xingwang,LIU Chao,ZHANG Cuiying.Single-Frequency Single-Epoch Ambiguity Resolution for Combined GPS/BDS Based on Regularization[J].Journal of Geodesy and Geodynamics,2016,36(12):1083-1088. |
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| Authors: | WANG Jing ZHAO Xingwang LIU Chao ZHANG Cuiying |
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| Abstract: | For the issue of rank deficiency in single-frequency single-epoch ambiguity resolution, a regularization matrix constraining coordinate correction parameters is constructed by singular value decomposition on coefficient matrix of double-differenced carrier phase observation equations, in order to improve the ill-condition of normal equation. Single-epoch ambiguity fixed solutions are then acquired using the LAMBDA method. Compared with fitting method of weights, the results indicate that for a 5.8m baseline, the ambiguity resolution success rate of BDS is increased by 17.61%, while the GPS, BDS and GPS/BDS of 2.34 km are increased by 4.67%, 3.56% and 3.63%, respectively. In addition, positioning precision in the East and North reaches the millimeter and millimeter to centimeter levels in Up , when the cut-off elevation angle of satellites is taken as 10°. |
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| Keywords: | single-frequency single-epoch regularization GPS/BDS ambiguity resolution |
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