一种建立南海浅海海域高精度潮汐模型方法的研究  

A Method of Constructing High Precision Tide Model for Shallow Water in the South China Sea

作　　者：雷宁[1,2] 付延光 杨龙[2] 周兴华[1,2] 阳凡林[1] 王朝阳[1] 孙维康[1] 

机构地区：[1]山东科技大学测绘科学与工程学院,山东青岛266510 [2]国家海洋局第一海洋研究所,山东青岛266061

出　　处：《海洋科学进展》2016年第3期370-376,共7页Advances in Marine Science

基　　金：中央级公益性科研院所基本科研业务费专项资金资助项目--基于GNSS浮标的卫星高度计定标技术研究(2014G21);国家海洋局科技司专项业务费项目--开展卫星海洋测绘应用(WX0316005);国家国际科技合作专项--自主星载高度计海面在轨绝对定标关键技术研究(2014DFA21710)

摘　　要：针对应用高度计数据建立的海潮模型在浅海海域精度较低的现状,提出采用移去-恢复技术联合利用19a T/P、Jason-1卫星原始轨道、变轨轨道高度计数据建立南海浅海海域高精度潮汐模型的方法。处理卫星高度计数据时以平均海平面为基准面,按纬差0.1°间隔采用沿迹分析提取南海海域原始轨道2 184个正常点和变轨轨道1 626个正常点;分别对原始轨道、变轨轨道正常点进行调和分析以及响应分析,得到潮汐主要分潮调和常数;进一步建立网格潮汐模型,讨论了不同分辨率潮汐模型的精度差异。基于验潮站数据集结果运用移去-恢复技术对所建潮汐模型进行改进,改进后潮汐模型4个最主要分潮O_1,K_1,M_2和S_2的RMS分别提高至7.76,9.40,13.86和8.51cm,RSS达到20.32cm,表明移去-恢复技术能够明显改善潮汐模型在浅海海域的精度。Aimed to solve the low precision problem in using the altimeter data to establish ocean tide model for shallow water,a method of remove-restore technique is proposed,with 19 years of TOPEX/Poseidon and Jason-1altimeter data and gauge data being used,for establishing a high precision shallow water tide model.With the mean sea level being the reference surface,we calculated tidal constants for 1 626 normal points by response analysis and 2 184 normal points by harmonic analysis along the altimeter tracks in the South China Sea with 0.1°interval in latitude,and then established grid ocean tide model.RMSdifference and RSSdifference of different solutions of the tidal model are evaluated.Based on tidal constants at gauge stations,the remove-restore technique is applied to improve the tide model precision,and the RMSdifferences of the improved tide model for the four major constituents O1,K1,M2 and S2 have reached to 7.76 cm,9.40 cm,13.86 cm,8.51 cm,and the RSSdifference has reached to 20.32 cm,showing that the remove-restore technique can improve the precision of the tide model significantly.

关 键 词：卫星测高 潮汐模型 调和分析 响应分析 移去-恢复技术 

分 类 号：P731.23[天文地球—海洋科学]