中国地壳运动网络的海潮位移改正

OCEAN TIDAL DISPLACEMENT CORRECTION FOR CRUST MOVEMENT NETWORK OF CHINA

采用CSR4.0全球海潮模型 ,顾及中国近海海潮图 ,计算了海潮中 8个主要潮波(M2 ,N2 ,S2 ,K2 ,O1 ,P1 ,Q1 ,K1 波 )引起的中国地壳运动观测网中测站的海潮位移改正 .文中也讨论了海潮模型和格林函数对海潮位移改正的影响 .作为实例 ,把海潮影响加入GAMIT软件 ,用实测GPS数据检核出海潮对GPS基线向量的影响 .结果显示了海洋负荷潮引起测站位移和GPS基线向量改变的最大值大约分别为 2厘米和

Using CSR4.0 global ocean tide model and local ocean tide maps in China Seas, the ocean tidal displacement correction for space geodetic stations in China crust movement network were calculated. The effects on ocean tidal displacement corrections caused by tide model and loading Green's function were also discussed. As an example, using the GPS observation data, the bias of GPS baseline vectors caused by the ocean loading tides was estimated. Our results showed that the corrections of ocean loading tide reach about 2 centimeters on site coordinates and 2 millimeters on baseline vectors in maximum.