逆气压改正对卫星测高数据反演潮汐参数的影响

¹ 大连舰艇学院海洋与测绘科学系,大连市解放路667号,116018;² 国家海洋局第一海洋研究所,青岛市高科技工业园区仙霞岭路6号,266061;³ 武汉大学测绘学院,武汉市珞喻路129号,430079

基金项目: 武汉大学地球空间环境与大地测量教育部重点实验室开放研究基金资助项目(03-04-06,1469990324233-04-03);国家测绘局测绘科技发展基金资助项目(2001-01-02)

详细信息

Effects of Inverse Barometer!Correction on Tidal Parameters Derived from Altimetry Data

¹ Department of Hydrography and Cartography,Dalian Naval Academy,667 Jiefang Road,Dalian 116018,China;² The First Institute of Oceanography,State Oceanic Administration,6 Xianxialing Road,High-Tech Industrial District,Qingdao 266061,China;³ Shool of Geodesy and Geomatics,Wuhan University,129 Luoyu Road,Wuhan 430079,China

Funds: 武汉大学地球空间环境与大地测量教育部重点实验室开放研究基金资助项目(03-04-06,1469990324233-04-03);国家测绘局测绘科技发展基金资助项目(2001-01-02)

摘要: 定量分析了逆气压改正对各主分潮潮汐参数反演的影响。结果表明,逆气压改正对Sa的反演结果影响最大,在Sa的实际振幅中,气压变化的平均贡献比率为42%,气压变化使Sa的迟角减小了约27°,而对其他主分潮的影响可忽略不计。建议在应用卫星测高数据时,不加逆气压改正,但在数据处理时,需加Sa分潮的改正。
- 逆气压改正 /
- 潮汐 /
- 年周期分潮
Abstract: The contribution of the IB correction to the annual constituent S_(a) and other principal tides is evaluated.When the IB correction is applied with the MGDR or calculated with an average pressure for each cycle,the discrepancy both are large,and the difference between them is small. But if IB correction is not added to the altimeter ranges,the discrepancy is almost reduced.Through comparing the difference of harmonic constant of S_(a),the average contribution of seasonal air pressure variation in amplitude of S_(a) is(about) 42%,and the seasonal air pressure variation causes the phase lag of S_(a) decreasing 27°.So IB correction should not be added to the altimeter range,and the tide model of S_(a) is essential to the annual variation to be removed.Therefore an S_(a) model covering China sea is established.
- inverse barometer /
- tide /
- annual constituent

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