Detection of Tidal Loading Signals from GPS Permanent Array of GSI Japan
Detection of Tidal Loading Signals from GPS Permanent Array of GSI Japan
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日本GSI GPS永久阵潮汐载荷信号检测
DOI：
10.11366/sokuchi1954.47.187
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发表时间：
2001
影响因子：
--
通讯作者：
C. Meertens
中科院分区：
文献类型：
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作者：
Y. Hatanaka;A. Sengoku;Tadahiro Sato;James R. Johnson;C. Rocken;C. Meertens
日本地区的潮汐位移信号来源于地理调查研究所的GPS地球观测网（GEONET）。这些潮汐信号的振幅可达2.5 cm，大部分可以用Matsumoto等（2000,2001）的海潮载荷位移模型来解释。如果不进行校正，装载潮汐信号对日本西南部对流层延迟估计的影响将超过1厘米。利用模型对大部分主要潮汐分量进行海潮负荷校正，可以有效地消除位移和对流层估算中的这些潮汐信号。两种海洋载荷模型的剩余潮汐信号对比表明，采用新模型进行校正后，剩余M2潮汐信号有所减少。这些结果证明了密集GPS网络探测未建模潮汐信号的能力。
The tidal displacement signals are derived for the Japan area from the GPS Earth Observation Network (GEONET) of Geographical Survey Institute. The amplitude of these tidal signals is up to 2.5 cm and most of them are explained by the ocean tide loading displacement model by Matsumoto et al. (2000, 2001). The loading tide signals affect the troposphere delay estimates by more than 1 cm in southwestern Japan if they are not corrected. These tidal signals in the displacement and troposphere estimates are effectively eliminated by applying the ocean tide loading correction with the model for most of the major tidal constituents. The comparison of residual tidal signals by applying the two ocean loading models shows reduction of the residual M2 tidal signals by applying the correction with the newer model. These results demonstrate the capability of a dense GPS network to detect un-modeled tidal signals.