基于经验正交函数分解的GRACE时变地球重力场滤波处理
|
摘要
针对传统GRACE去相关滤波方法很难同时完美实现真实信号的保留与条带误差的削弱等问题,提出将经验正交函数滤波与去相关滤波相结合的改进策略。分别对真实GRACE数据和模拟数据进行滤波处理,结果表明,改进的滤波方法继承了经验正交函数滤波方法与去相关滤波方法的优点,能够在尽可能地削弱南北条带误差影响的同时,最大程度地保留真实地球物理信号。
In using the GRACE filtering process, the traditional de-correlation filtering method presents difficulties in perfectly preserving the real signal and weakening the stripe error at the same time. In order to solve this problem, the paper makes a certain improvement on the filtering method and combined EOF filtering method with de-correlation filtering method. Several experiments are used to filter real GRACE data and simulated data, respectively. The results show that the improved filtering method inherits the advantages of the EOF filtering method and the de-correlation filtering method. The method weakens the influence of the north-south stripe error as much as possible,while preserving the most realistic signal.
In using the GRACE filtering process, the traditional de-correlation filtering method presents difficulties in perfectly preserving the real signal and weakening the stripe error at the same time. In order to solve this problem, the paper makes a certain improvement on the filtering method and combined EOF filtering method with de-correlation filtering method. Several experiments are used to filter real GRACE data and simulated data, respectively. The results show that the improved filtering method inherits the advantages of the EOF filtering method and the de-correlation filtering method. The method weakens the influence of the north-south stripe error as much as possible,while preserving the most realistic signal.
引文
[1] Tapley B D,Bettadpur S, Ries J C,et al. GRACE Measurements of Mass Variability in the Earth System[J]. Science,2004,305(5 683):503-505
[2] Chen J L,Wilson C R,Blankenship D,et al.Accelerated Antarctic Ice Loss from Satellite Gravity Measurements[J].Nature Geoscience,2009,2(12):859-862
[3] Han S C,Shum C K,Bevis M,et al.Crustal Dilatation Observed by GRACE after the 2004 Sumatra-Andaman Earthquake[J].Science,2006,313(5 787):658-662
[4] Luo Z C,Li Q,Zhang K,et al.Trend of Mass Change in the Antarctic Ice Sheet Recovered from the Grace Temporal Gravity Field[J].Science China Earth Science,2011,55(1):76-82
[5] Matsuo K, Heki K.Time-Variable Ice Loss in Asian High Mountains from Satellite Gravimetry[J].Earth and Planetary Science Letters,2010,290(1-2):30-36
[6] Rodell M,Velicogna I,Famiglietti J S.Satellite-Based Estimates of Groundwater Depletion in India[J].Nature,2009,460(7 258):999-1 002
[7] 许才军,龚正.GRACE时变重力数据的后处理方法研究进展[J].武汉大学学报:信息科学版,2016,41(4):503-510(Xu Caijun, Gong Zheng. Review of the Post-Processing Methods on GRACE Time Varied Gravity Data[J]. Geomatics and Information Science of Wuhan University,2016,41(4):503-510)
[8] Wouters B,Schrama E J O. Improved Accuracy of GRACE Gravity Solutions through Empirical Orthogonal Function Filtering of Spherical Harmonics[J].Geophysical Research Letters,2007,34(23):L23711
[9] Wahr J,Molenaar M, Bryan F.Time Variability of the Earth’s Gravity Field: Hydrological and Oceanic Effects and Their Possible Detection Using GRACE[J].Journal of Geophysical Research:Solid Earth,1998,103(B12):30 205-30 229
[10] Swenson S,Wahr J. Post-Processing Removal of Correlated Errors in GRACE Data[J].Geophysical Research Letters,2006,33(8): L08402
[11] Hyv?rinen A. Survey on Independent Component Analysis[J]. Neural Computing Surveys,1999,2(4):94-128
[12] Preisendorfer R W. Principal Component Analysis in Meteorology and Oceanography[M]. New York:Elsevier Science Ltd,1988
[13] Schrama E J O,Wouters B,Lavallée D A.Signal and Noise in Gravity Recovery and Climate Experiment(GRACE) Observed Surface Mass Variations[J].Journal of Geophysical Research,2007,112(B8):B8407
[14] Chen J L,Wilson C R,Tapley B D,et al.Antarctic Regional Ice Loss Rates from GRACE[J].Earth and Planetary Science Letters,2008,266(1-2):140-148
[15] Chen J L, Wilson C R, Tapley B D, et al. GRACE Detects Coseismic and Postseismic Deformation from the Sumatra-Andaman Earthquake[J].Geophysical Research Letters,2007,34(13):L13302
[16] Wahr J,Swenson S, Velicogna I. Accuracy of GRACE Mass Estimates[J]. Geophysical Research Letters,2006,33(6):L06401
[2] Chen J L,Wilson C R,Blankenship D,et al.Accelerated Antarctic Ice Loss from Satellite Gravity Measurements[J].Nature Geoscience,2009,2(12):859-862
[3] Han S C,Shum C K,Bevis M,et al.Crustal Dilatation Observed by GRACE after the 2004 Sumatra-Andaman Earthquake[J].Science,2006,313(5 787):658-662
[4] Luo Z C,Li Q,Zhang K,et al.Trend of Mass Change in the Antarctic Ice Sheet Recovered from the Grace Temporal Gravity Field[J].Science China Earth Science,2011,55(1):76-82
[5] Matsuo K, Heki K.Time-Variable Ice Loss in Asian High Mountains from Satellite Gravimetry[J].Earth and Planetary Science Letters,2010,290(1-2):30-36
[6] Rodell M,Velicogna I,Famiglietti J S.Satellite-Based Estimates of Groundwater Depletion in India[J].Nature,2009,460(7 258):999-1 002
[7] 许才军,龚正.GRACE时变重力数据的后处理方法研究进展[J].武汉大学学报:信息科学版,2016,41(4):503-510(Xu Caijun, Gong Zheng. Review of the Post-Processing Methods on GRACE Time Varied Gravity Data[J]. Geomatics and Information Science of Wuhan University,2016,41(4):503-510)
[8] Wouters B,Schrama E J O. Improved Accuracy of GRACE Gravity Solutions through Empirical Orthogonal Function Filtering of Spherical Harmonics[J].Geophysical Research Letters,2007,34(23):L23711
[9] Wahr J,Molenaar M, Bryan F.Time Variability of the Earth’s Gravity Field: Hydrological and Oceanic Effects and Their Possible Detection Using GRACE[J].Journal of Geophysical Research:Solid Earth,1998,103(B12):30 205-30 229
[10] Swenson S,Wahr J. Post-Processing Removal of Correlated Errors in GRACE Data[J].Geophysical Research Letters,2006,33(8): L08402
[11] Hyv?rinen A. Survey on Independent Component Analysis[J]. Neural Computing Surveys,1999,2(4):94-128
[12] Preisendorfer R W. Principal Component Analysis in Meteorology and Oceanography[M]. New York:Elsevier Science Ltd,1988
[13] Schrama E J O,Wouters B,Lavallée D A.Signal and Noise in Gravity Recovery and Climate Experiment(GRACE) Observed Surface Mass Variations[J].Journal of Geophysical Research,2007,112(B8):B8407
[14] Chen J L,Wilson C R,Tapley B D,et al.Antarctic Regional Ice Loss Rates from GRACE[J].Earth and Planetary Science Letters,2008,266(1-2):140-148
[15] Chen J L, Wilson C R, Tapley B D, et al. GRACE Detects Coseismic and Postseismic Deformation from the Sumatra-Andaman Earthquake[J].Geophysical Research Letters,2007,34(13):L13302
[16] Wahr J,Swenson S, Velicogna I. Accuracy of GRACE Mass Estimates[J]. Geophysical Research Letters,2006,33(6):L06401
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |