| 海洋潮汐负荷对精密单点定位的影响研究 |
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| 引用本文： | 李艳红,成芳,沈朋礼,肖厦.海洋潮汐负荷对精密单点定位的影响研究[J].全球定位系统,2021,46(2):25-31. |
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| 作者姓名： | 李艳红 成芳 沈朋礼 肖厦 |
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| 作者单位： | 1.中国科学院国家授时中心，西安 710600 |
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| 摘 要： | 在全球范围内选取地处内陆、沿海和岛屿的85个国际GNSS服务(IGS)测站,对其一天的观测数据进行无海洋潮汐改正和加入GOT4.8海洋潮汐改正模型两种解算,分析了海洋潮汐负荷对全球不同地理区域IGS测站精密单点定位(PPP)精度的影响.结果表明:岛屿测站受海洋潮汐负荷的影响范围最广,改正量最大.加入海洋潮汐改正后,约9...
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| 关 键 词： | 海洋潮汐负荷 精密单点定位(PPP) IGS测站 GOT4.8 海洋潮汐改正 |
| 收稿时间： | 2020-09-04 |
Study on the influence of ocean tidal load on precise point positioning |
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| Affiliation: | 1.National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China2.Key Laboratory of Precise Positioning and Timing Technology, Chinese Academy of Sciences, Xi’an 710600, China3.University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | A total of 85 IGS stations located inland, on the coast and on the islands are selected from around the world, and the position of these stations are solved by considering adding the global ocean tide model (GOT4.8) or not. The effect of ocean tidal load on the precise point positioning(PPP) accuracy of IGS stations in different geographical regions is analyzed and studied. The results show that ocean tidal load has the greatest impact on the station located on the island. After adding the ocean tide correction, about 91% of the positioning error of the island stations are improved, and the proportions of coastal stations and inland stations are about 85% and 82%, respectively. The ocean tide correction has almost no impact on the N direction of the station, and has little impact on the E direction, and has the greatest positive impact on the U direction. Among them, the impact range in the U direction of the island station is 2~8 mm, and that of some stations are close to the centimeter level. |
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