| BDS-3卫星钟差模型化特性分析北大核心CSCD |
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| 引用本文： | 丁慧敏,王文贯,李浩军.BDS-3卫星钟差模型化特性分析北大核心CSCD[J].大地测量与地球动力学,2023,43(2):153-157. |
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| 作者姓名： | 丁慧敏 王文贯 李浩军 |
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| 作者单位： | 1.同济大学测绘与地理信息学院200092;2.广西建设职业技术学院土木工程学院530007; |
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| 基金项目： | 国家自然科学基金(41974025,42174019)；广西高校中青年教师科研基础能力提升项目(2022KY1163)。 |
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| 摘 要： | 采用2021年(GPS周2138~2190)IGS BDS-3卫星精密钟差产品进行周期性变化分析,并在周期性分析结果基础上建立高精度模型化函数。结果表明,附加8个周期的模型化精度能达到0.049 ns,与二次多项结果相比,精度提高约70%。同时,对BDS-3卫星钟差模型化结果进行精密单点定位(PPP)性能分析,虽然其收敛时间稍慢于IGS最终产品,但能实现cm级定位,且模型化产品与目前IGS离散化产品相比可大大节省内存空间。
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| 关 键 词： | 北斗卫星钟差 周期特性 钟差模型化 |
Analysis of the Modeling Characteristics of BDS-3 Satellite Clock Offset |
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| DING Huimin,WANG Wenguan,LI Haojun.Analysis of the Modeling Characteristics of BDS-3 Satellite Clock Offset[J].Journal of Geodesy and Geodynamics,2023,43(2):153-157. |
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| Authors: | DING Huimin WANG Wenguan LI Haojun |
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| Abstract: | We use the satellite precise clock offset product of IGS BDS-3 in 2021(GPS week 2 138 to 2 190) to analyze the periodic change and construct a high-precision model function based on the periodic results. The results show that the modeling accuracy of the additional eight periods reaches 0.049 ns, increasing accuracy by about 70% compared with the quadratic polynomial results. Meanwhile, the performance of precise point positioning(PPP) is analyzed based on the modeling results of BDS-3 satellite clock offset. Although the PPP convergence time of the modeling BDS-3 satellite clock offset product is slightly slower than that of the IGS final products, it can achieve centimeter-level positioning. Moreover, the modeling products can greatly save memory space compared with the current IGS discretization products. |
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