海岛礁相对重力测量的潮汐影响

Effect of Tides on Relative Gravity Survey of Ocean Islands

着重分析固体潮模型、潮汐因子的选取和海洋负荷潮的求定,并利用ETGTAB模型数据详细计算了相对重力测量中的潮汐改正,说明在近海和岛屿地区进行高精度海岛礁相对重力测量时,必须考虑精确的固体潮和海洋负荷潮改正,从而提高相对重力测量的联测精度。

As important corrections in the data preprocessing of high precision relative gravity survey,the model of solid tidal correction and the selection of tidal factor,and the calculation of ocean load tidal correction were given a specialized analysis.The ETGTAB model was used in the computation of tidal corrections in relative gravity survey,which demonstrated that when high precision relative gravity survey was implemented in offshore and on island area,the exact solid tidal correction and ocean load tidal correction must be considered in order to improve the accuracy of a combined relative gravity survey.