Stability of direct GPS estimates of ocean tide loading
Stability of direct GPS estimates of ocean tide loading
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DOI：
10.1029/2004gl020588
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发表时间：
2004-08
影响因子：
5.2
通讯作者：
C. Allinson;P. Clarke;S. Edwards;Matt A. King;T. Baker;P. Cruddace
中科院分区：
文献类型：
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作者：
C. Allinson;P. Clarke;S. Edwards;Matt A. King;T. Baker;P. Cruddace
我们通过在每日GPS分析中直接估计固定周期的简谐运动来观测全天和半日周期的海潮负荷(OTL)。多个溶液的叠加使我们能够分离出主要的近全天和近半日的OTL分量。使用来自英国站点的数据，其中M2分量的预测OTL幅度在3-46 mm之间变化，我们表明，当至少90天的数据叠加时，我们对主要OTL分量的估计是稳定的。我们的最终观测结果与模型预测(使用FES95.2、FES99、GOT00.2、TPXO.2、TPXO.6、NAO.99b和CSR3模型)进行了比较，并与FES99预测的OTL一致，但在某些位置与CSR3和TPXO.2潮汐模型预测的结果有显著差异。
We observe ocean tide loading (OTL) at diurnal and semi‐diurnal periods by directly estimating fixed‐period harmonic motions within individual daily GPS analyses. Stacking of multiple solutions allows us to isolate the principal near‐diurnal and near‐semi‐diurnal OTL components. Using data from UK sites where predicted OTL for the M2 component varies from 3–46 mm in amplitude, we show that our estimates are stable for the principal OTL components when data from at least 90 days are stacked. Our final observations are compared to model predictions (using the FES95.2, FES99, GOT00.2, TPXO.2, TPXO.6, NAO.99b and CSR3 models) and are in agreement with OTL predicted by FES99, but differ significantly at some locations from those predicted by the CSR3 and TPXO.2 tidal models.