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首页> 外文期刊>Journal of geodynamics >Determination of vertical displacements over the coastal area of Korea due to the ocean tide loading using GPS observations
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Determination of vertical displacements over the coastal area of Korea due to the ocean tide loading using GPS observations

机译：利用GPS观测确定由于潮汐载荷引起的韩国沿海地区的垂直位移

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This paper describes the GPS applicability for detecting the vertical displacements of ground stations caused by ocean tide loading effects. An experiment was carried out using 12 permanent GPS stations located in the coastal area of Korea using data in the period 1 July until 26 August 2003. The relative height differences were calculated from hourly DGPS data processing based on the carrier-phase observation. The power spectra of the M_2 and N_2 constituents of ocean tide loading were derived using the CLEAN algorithm. The differential vertical displacements generated by the ocean tide loading effect are typically 3-25 mm in coastal area of the Korea. We compared the results from GPS with those of the ocean tide models, NAO.99Jb regional model and GOT00.2, FES99 global models. The M_2 (N_2) amplitude differences of vertical displacements between GPS and GOT00.2 is 1.22 ± 3.61 mm (1.01 ± 1.48mm), and that of the M_2 (N_2) amplitude difference between GPS and FES99 is 0.04 ±4.64 mm (0.64 ± 1.75mm), whereas the M_2 (N_2) amplitude difference between GPS and NAO.99Jb are 0.05 ± 1.03 mm (0.86 ± 1.18 mm). The highest vertical displacements at the PALM station are found for 24.5 ± 0.7 mm from GPS observation, and 22.9 mm from the regional model NAO.99Jb and 13.17 and 10.00mm from the global models GOT00.2 and FES99, respectively. These values show that the vertical displacements derived from GPS are in good agreement with those of the regional model NAO.99Jb around Korea, more than with the global models. This result indicated that GPS is an effective tool to measure the vertical displacement caused by the ocean tide loading effect in the coastal area, and we need to use the NAO.99Jb ocean tide model rather than the global ocean tide models in and around the Korean peninsula for position determination with permanent GPS installations. This work demonstrates that vertical displacement caused by the M_2 and N_2 constituents of ocean tide loading can be measured by carrier-phase DGPS.
机译：本文介绍了GPS在检测潮汐载荷作用引起的地面站垂直位移方面的适用性。使用位于韩国沿海地区的12个永久GPS站进行了一项实验，使用2003年7月1日至8月26日期间的数据。相对高差是根据载波相位观测值，通过每小时DGPS数据处理得出的。利用CLEAN算法推导了海潮载荷中M_2和N_2成分的功率谱。在韩国的沿海地区，由潮汐载荷效应产生的差分垂直位移通常为3-25 mm。我们将GPS的结果与海潮模型，NAO.99Jb区域模型和GOT00.2，FES99全局模型的结果进行了比较。 GPS和GOT00.2之间的垂直位移的M_2（N_2）幅度差为1.22±3.61 mm（1.01±1.48mm），GPS和FES99之间的M_2（N_2）幅度差为0.04±4.64 mm（0.64± 1.75毫米），而GPS和NAO.99Jb之间的M_2（N_2）振幅差为0.05±1.03毫米（0.86±1.18毫米）。 GPS观测发现PALM站的最高垂直位移为24.5±0.7 mm，区域模型NAO.99Jb为22.9 mm，全球模型GOT00.2和FES99为13.17和10.00mm。这些值表明，从GPS得出的垂直位移与韩国周围的区域模型NAO.99Jb的位移，与与全球模型的位移一致。该结果表明，GPS是一种有效的工具，可以测量沿海地区海潮负荷效应引起的垂直位移，因此我们需要使用NAO.99Jb海潮模型，而不是韩国及其周围地区的全球海潮模型。半岛用于永久GPS定位。这项工作表明，可以通过载波相位DGPS测量由潮汐载荷的M_2和N_2成分引起的垂直位移。

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