| 顾及OSB改正的BDS-3新频点精密单点定位精度分析 |
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| 引用本文： | 顾嘉琛,宋传峰,田坤俊.顾及OSB改正的BDS-3新频点精密单点定位精度分析[J].大地测量与地球动力学,2023,43(1):18-22. |
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| 作者姓名： | 顾嘉琛 宋传峰 田坤俊 |
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| 摘 要： | 基于武汉大学发布的BDS-2/3观测量偏差(OSB)改正产品，采用国内8个iGMAS测站1个月的观测数据，分析OSB改正前后对B1I/B3I旧频点及B1C/B2a新频点2种组合模式下BDS-2/3伪距单点定位（SPP）和精密单点定位（PPP）精度的影响。结果表明，B1I、B3I、B1C和B2a的OSB年均值为－80~70 ns，各频点OSB年稳定性分别为3.41 ns、5.87 ns、2.04 ns和2.32 ns。在BDS-2/3伪距单点定位方面，改正后B1I/B3I组合的3D方向定位精度优于2.53 m，B1C/B2a组合的3D方向定位精度优于3.84 m，二者精度提升均不明显。在BDS-2/3精密单点定位方面，B1I/B3I组合的3D方向定位精度优于7.7 cm，提升约20.6%，收敛时间约为38 min，提升约7.3%；B1C/B2a组合的3D方向定位精度优于3.7 cm，提升约11.9%，收敛时间约为36 min，提升约16.3%。
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| 关 键 词： | BDS-2/3 观测量码偏差 差分码偏差 伪距单点定位 精密单点定位 |
Precision Single Point Positioning Accuracy Analysis of BDS-3 New Frequencies Based on OSB Correction |
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| GU Jiachen,SONG Chuanfeng,TIAN Kunjun.Precision Single Point Positioning Accuracy Analysis of BDS-3 New Frequencies Based on OSB Correction[J].Journal of Geodesy and Geodynamics,2023,43(1):18-22. |
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| Authors: | GU Jiachen SONG Chuanfeng TIAN Kunjun |
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| Abstract: | Based on the BDS-2/3 satellites observable-specific signal biases(OSB) correction product published by Wuhan University observation data of eight iGMAS stations in China for one month,we analyze the influence of OSB correction on the pseudo-distance single point positioning and precision point positioning accuracy of BDS-2/3 under the combination mode of B1I/B3I old frequency points and B1C/B2a new frequency points. The results show that the mean of B1I, B3I, B1C and B2a OSB ranged from －80 ns to 70 ns, and the annual stability of OSB at each frequency point are 3.41 ns, 5.87 ns, 2.04 ns and 2.32 ns, respectively. In terms of BDS-2/3 pseudo-range single point positioning, after using OSB product correction, the positioning accuracy of B1I/B3I combination is better than 2.53 m, the positioning accuracy of B1C/B2a combination is better than 3.84 m, and the accuracy improvement is not obvious. In terms of BDS-2/3 precise point positioning, the positioning accuracy of 3D direction using B1I/B3I is better than 7.7 cm, the improvement is about 20.6%, the convergence time is about 38 min, the improvement is about 7.3%. The positioning accuracy of 3D direction of B1C/B2a is better than 3.7 cm, and the improvement is about 11.9%. The convergence time is about 36 min, improved about 16.3%. |
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| Keywords: | BDS-2/3 OSB DCB SPP PPP |
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