基于ERS-2和Envisat测高卫星提取西太平洋潮汐信息

摘要

对两颗太阳同步轨道测高卫星ERS-2和Envisat 1995～2010年169个重复周期(共近15 a)的数据进行沿轨正交响应分析,得到中国海及西太平洋地区的海洋潮汐调和常数,并利用交叉点位置上升轨迹与下降轨迹提取的潮汐信息和验潮站数据分析了结果的准确度.结果表明,除S2、K1分潮外,基于ERS-2和Envisat测高卫星能够提取出可靠和分布合理的潮汐调和常数,结合交叉轨迹与邻近地面轨迹将有效改善采样规律和观测样本数量,进一步提高潮汐参数的准确度.%This study extracts ocean tides in the China sea areas and western Pacific ocean by the ERS-2 and Envisat-1 series of sun synchronous satellite altimeter data over a tidal period of about 15 years.Orthotide response analysis is performed tocompute harmonic constants of 12 constituents along the tracks,and the accuracy of tidal parameters is assessed at the crossovers.The results show that the major constituents derived from the ERS series altimeter data are reasonable and reliable,excepting the S2 and K1 constituents.Considering the additional information from crossovers and adjacent tracks,it is possible to improve the accuracy of harmonics for coastal zones and high latitude areas.