Volume 35 Issue 10
Oct.  2010
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TANG Yan, BAO Jingyang, LIU Yanchun, ZHANG Lihua. Research on Orthogonal Response Analysis of Tide and Current Using Short Term Data[J]. Geomatics and Information Science of Wuhan University, 2010, 35(10): 1151-1156.
Citation: TANG Yan, BAO Jingyang, LIU Yanchun, ZHANG Lihua. Research on Orthogonal Response Analysis of Tide and Current Using Short Term Data[J]. Geomatics and Information Science of Wuhan University, 2010, 35(10): 1151-1156.

Research on Orthogonal Response Analysis of Tide and Current Using Short Term Data

Funds: 国家自然科学基金资助项目(40874001);地理空间信息工程国家测绘局重点实验室开放研究基金资助项目(200810);山东省泰山学者建设工程专项经费资助项目(TSXZ-0520)
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  • Received Date: July 20, 2010
  • Revised Date: July 20, 2010
  • Published Date: October 04, 2010
  • The requirement of tide or current data length of orthogonal response analysis is researched through theoretical deduction and experiment.The results show that it requires at least 2 day-length of ideal data.But for the actual observations,it requires at least 7 day-length data in the diurnal tide dominated area,and 10 days in the semi-diurnal tide dominated area.Towards a shorter term data than described above,an improved model of orthogonal response analysis is found and used to analysis this type of data through introducing ratio of parameters and changing the value of Δτ.The result of experiment using 366 groups of data at 12 stations in China,which contains 1 day-length data in each group,showed that the parameters calculated from short term data are close to the ones from long term data(annual data).Finally,a comparison between orthogonal response analysis and quasi-harmonic analysis for short term data is studied through both theoretical deduction and experiment.The results showed that the former one has a higher precision and does not have to take good astronomic date into account.

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