| BDS-3钟差改正数实时预报方法 |
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| 引用本文： | 刘笃学,贺凯飞,杨金权,徐向,李家兴. BDS-3钟差改正数实时预报方法[J]. 测绘通报, 2023, 0(1): 88-94. DOI: 10.13474/j.cnki.11-2246.2023.0015 |
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| 作者姓名： | 刘笃学 贺凯飞 杨金权 徐向 李家兴 |
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| 作者单位： | 1. 中国石油大学(华东)海洋与空间信息学院, 山东 青岛 266580;2. 自然资源部海上丝路海洋 资源环境组网观测技术创新中心, 山东 青岛 266580 |
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| 基金项目： | 国家自然科学基金(42174021);山东省自然科学基金(ZR2021MD060) |
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| 摘 要： | 在远海精密动态定位研究中，BDS-3卫星钟差改正信息的质量对定位结果具有直接影响。在传输实时改正信息时，为了同时兼顾效率及成本，岸基用户端通常会将实时信息压缩后传输至远海用户端。针对数据压缩问题，本文提出了利用钟差改正数预报模型进行数据压缩，同时分析钟差改正数的结构特征，并将其分解为总体趋势序列与随机波动序列，分别构建预报模型。结果表明，DSC模型在20 min的预报区间内较DLP模型提升了6%,较DLP模型提升了9%。
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| 关 键 词： | BDS-3改正信息 质量评估 数据结构特征 钟差改正数预报 数据压缩 |
| 收稿时间： | 2022-02-21 |
Real-time prediction of BDS-3 clock correction |
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| LIU Duxue,HE Kaifei,YANG Jinquan,XU Xiang,LI Jiaxing. Real-time prediction of BDS-3 clock correction[J]. Bulletin of Surveying and Mapping, 2023, 0(1): 88-94. DOI: 10.13474/j.cnki.11-2246.2023.0015 |
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| Authors: | LIU Duxue HE Kaifei YANG Jinquan XU Xiang LI Jiaxing |
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| Affiliation: | 1. College of Oceanography and Space Informatics, China University of Petroleum(East China), Qingdao 266580, China;2. Technology Innovation Center for Maritime Silk Road Marine Resources and Environment Networked Observation, Ministry of Natural Resources, Qingdao 266580, China |
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| Abstract: | In the study of offshore precise dynamic positioning, the quality of BDS-3 correction information has a direct impact on the positioning results. This paper evaluates the quality of BDS-3 correction from the aspects of stability and accuracy. If BDS/GNSS fusion positioning mode is adopted, the communication cost of BDS-SMC is significantly higher. To solve this problem, this study proposes to use the clock correction prediction model for data compression, and analyze the structural characteristics of the clock correction, which is decomposed into the overall trend series and random fluctuation series, and then builds the prediction model respectively. The results show that DSC model is 6% higher than DLP model and 9% higher than DLP model in the 20 min prediction interval. |
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| Keywords: | BDS-3 correction information quality assessment data structure characteristics clock correction prediction data compression |
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