利用动态PPP技术确定海潮负荷位移

doi:10.11947/j.AGCS.2016.20150327

测绘学报 ›› 2016, Vol. 45 ›› Issue (6): 631-638.doi: 10.11947/j.AGCS.2016.20150327

• 大地测量学与导航 • 下一篇

利用动态PPP技术确定海潮负荷位移

张小红, 马兰, 李盼

武汉大学测绘学院, 湖北武汉 430079

收稿日期:2015-06-23 修回日期:2016-02-19 出版日期:2016-06-20 发布日期:2016-06-29
作者简介:张小红(1975-),男,教授,主要研究方向为GNSS精密定位及地学应用。E-mail:xhzhang@sgg.whu.edu.cn
基金资助:
高等学校博士学科点专项科研基金(20130141110001);国家自然科学基金(41474025)

Determination of Ocean Tide Loading Displacements Using Kinematic PPP

ZHANG Xiaohong, MA Lan, LI Pan

School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China

Received:2015-06-23 Revised:2016-02-19 Online:2016-06-20 Published:2016-06-29
Supported by:
Specialized Research Fund for the Doctoral Program of Higher Education (No. 20130141110001);The National Natural Science Foundation of China (No. 41474025)

摘要/Abstract

摘要： 利用动态PPP对香港12个GPS测站2007-2012年的数据反演了海潮负荷位移,通过与7个全球海潮模型、1个区域模型和静态PPP反演的结果比较发现,相对于另外几个模型,动态PPP反演结果与TPXO.7.2、EOT11a、HAMTIDE和NAO99Jb模型的结果符合得更好。与静态PPP的结果比较发现其RMS与各模型的RMS大体上一致,只是在S₂、K₂和K₁的E方向和M₂、S₂的N方向稍有增加。此外,除K₂和K₁潮波外,动态PPP与模型的RMS值在水平方向上均小于1 mm,在垂直方向上均小于2.5 mm,能达到和静态PPP相当的精度。本文反演的结果与NAO99Jb模型值存在明显的系统偏差,当去除系统偏差后,所有潮波的RMS值都有明显的减小,尤其在K₁的垂直方向RMS从16.4 mm减少到1.3 mm。此外,通过将香港2012年验潮站数据反演的潮波参数与模型的结果进行比较发现,其结果同样与TPXO.7.2、EOT11a、HAMTIDE和NAO99Jb这4个模型更为符合,这进一步验证了动态PPP反演海潮的有效性,同时说明这4个模型比较适合香港区域。

关键词: 动态PPP, 海潮负荷位移, 海潮模型, 验潮站

Abstract: In this study, 12 GPS stations' continuous observations from 2007 to 2012 were utilized to determine ocean tide loading (OTL) displacements by kinematic PPP. Through comparison of estimates from kinematic PPP and results predicted by 7 global ocean tide models, one regional model and static PPP, TPXO.7.2, EOT11a, HAMTIDE and NAO99Jb were found having smaller RMS misfits than other models. Comparing the RMS misfits of static PPP results with that of models, we found that they have similar patterns except for the east direction of S₂, K₂ and K₁ and north direction of M₂ and N₂, in which the static PPP's RMS misfits are a little bit larger than models'. Furthermore, apart from K₁ and K₂, the RMS misfits between Kinematic PPP and model estimates are less than 1 mm and 2.5 mm in horizontal and vertical directions, which reach the same precision of static PPP. Obvious system bias was found between the results of kinematic PPP and NAO99Jb model. After subtracting the system bias, all constituents' RMS misfits decreased evidently, especially for K₁ constituent's vertical component, reducing from 16.4 mm to 1.3 mm. Moreover, by comparing the harmonic parameters estimated from tide gauge data and ocean tide models, we found results from gauge data also agree best with TPXO.7.2, EOT11a, HAMTIDE and NAO99Jb, which demonstrates that kinematic PPP is capable of determining OTL displacements and also indicates that these models are more applicable for Hong Kong.

Key words: kinematic PPP, ocean tide loading displacement, ocean tide model, tide gauge

中图分类号:

P228

张小红, 马兰, 李盼. 利用动态PPP技术确定海潮负荷位移[J]. 测绘学报, 2016, 45(6): 631-638.

ZHANG Xiaohong, MA Lan, LI Pan. Determination of Ocean Tide Loading Displacements Using Kinematic PPP[J]. Acta Geodaetica et Cartographica Sinica, 2016, 45(6): 631-638.

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利用动态PPP技术确定海潮负荷位移

Determination of Ocean Tide Loading Displacements Using Kinematic PPP

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