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利用TOPEX/Poseidon和Jason-1高度计数据提取中国南海潮汐信息 被引量:2

Extraction of Tidal Information in the South China Sea Based on TOPEX/Poseidon and Jason-1 Altimeter Data
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摘要 基于TOPEX/Poseidon和Jason-1卫星高度计16a原始轨道、6a变轨轨道数据,利用同步观测期间测高数据计算中国南海海域的系统偏差,生成基于TOPEX/Poseidon高度计平均海面的统一潮高时间序列,按纬差0.1°间隔提取原始轨道2 184个正常点和变轨轨道1 626个正常点,分别对原始轨道、变轨轨道逐正常点进行调和分析及响应分析,各得到8个分潮(Q1、O1、P1、K1、N2、M2、S2和K2)调和常数。利用交叉点处升轨、降轨不符值评估潮汐参数的稳定性,结果表明,变轨轨道交叉点处误差相对较大,多分潮总体综合预报误差RSS值为7.28cm。通过与全球海潮模型比较表明,该结果与海潮模型在中国南海开阔海域精度表现一致,在半封闭浅水海域差异较大;与验潮站结果进行比较发现,受中国南海复杂的潮波系统、与测高星下点距离等因素影响,中国南海北部海域RSS值较大,海潮模型结果在M2分潮单分潮预报中误差RMS值较大,为13.64cm,其余分潮均在10cm内。 Based on the 16years of data collected from the TOPEX/Poseidon and Jason-1nominal ground tracks during the primary mission,and six years of TOPEX/Poseidon and Jason-1interleaved ground track data,we calculate the system error in the South China Sea using the synchronous observation period data.This includes 2 184primary ground track normal points and 1 626interleaved ground track normal points with the difference of latitude of 0.1°.Harmonic analysis of the primary normal ground track points,and response analysis of the interleaved ground track normal points,was performed to acquire eight tidal constituents of the harmonic constants,including Q1,O1,P1,K1,N2,M2,S2,K2.Internal accuracy assessment used the discrepancy in the junction points between the ascending and descending orbits.The results show that the interleaved orbit junction points have poor RSS quality of about 7.28cm.A comparison with the global ocean tide models,shows that the results obtained in our study have a similar performance as the tide models in the South China Sea,except for a big difference RSS quality in the semi-closed shallow-water areas.A comparison with the gauge results shows that the northern part of the South China Sea have poor RSS values due to the influence of the complex tide-wave system.The RMS value of the M2constituent in the results reported in this paper and the tide models were 13.64cm,and the rest of the tidal constituents were within 10cm.
作者 付延光 周兴华 许军 刘森波 杨磊 FU Yanguang1,ZHOU Xinghua1,2,XU Jun3,LIU Senbo2,YANG Lei2(1College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao 266590, 2 First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China 3 Department of Hydrography and Cartography, Dalian Naval Academy, Dalian 116018, China)
出处 《武汉大学学报:信息科学版》 CSCD 北大核心 2018年第6期901-907,共7页 Geomatics and Information Science of Wuhan University
基金 国家国际合作专项(2014DFA21710) 开展卫星海洋测绘应用(WX0316005) 海洋调查评价与科技管理——海洋卫星业务应用与无线电管理 中央级公益性科研院所基本科研业务费专项资金(2011T05) 国家自然科学基金(40706038) GNSS业务化项目(FZ0317001)
关键词 卫星测高 南海 调和分析 响应分析 调和常数 satellite altimeter the South China Sea harmonic analysis response analysis harmonicconstant
作者简介 付延光,博士生,主要从事海洋潮汐分析与应用等方面研究。fuyanguang123@163.com;通讯作者:周兴华,博士,研究员。xhzhou@fio.org.cn
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