卫星重力场恢复中海潮负荷效应的改正
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摘要
本文详细介绍了海潮负荷效应对卫星重力测量影响的基本理论,并采用不同分辨率的FES2004、TPXO7.2和GOT00全球海潮模型计算了海潮负荷对卫星重力结果前60阶的影响;并用各个模型之间的差异作为海潮模型精度的估计量,计算了海潮模型误差对卫星重力结果的影响,与GRACE恢复的重力场精度的比较说明:海潮负荷效应主要影响卫星重力观测结果的低阶系数,35阶以下的影响都超过了目前重力场恢复精度;尽管由于卫星测高技术的发展,全球海潮模型的分辨率及精度均得到很大提高,但目前的全球海潮模型用于GRACE重力场恢复的前12阶的改正还是不够精确.受近海地区特殊海岸线及复杂海底地形的影响,整体精度仍得不到提高,利用高精度高分辨率的中国近海模型对不同分辨率全球海潮模型进行局部精化,进一步提高了全球海潮模型的整体精度,同时改善了卫星重力场恢复中的海潮负荷改正效果.
The basictheory of ocean tide loading effect on satellite gravity is introduced detailedly. And three global ocean tide models with different resolutionare used to estimate the loading effect up to harmonic degree 60,and the difference of the three ocean tide models is considered as the error estimation respectively. The comparison betweenthe numerical results and the standard deviation of gravity recovered with GRACE shows that the effect of ocean tide on satellite gravity is more serious than the error of the GRACE below degree 31. Although the accuracy of ocean tide models are improved with development of satellite altimetry,the current ocean tide models are not accurate enough for ocean tide correction to the GRACE below degree 12. The resolution of global ocean tide models has been improved,the whole accuracy of the global ocean tide models has been limited by the complex coastal areas and irregular coastlines. The accuracy of ocean tide correction to satellite gravity were improved by hybriding china local tide model and different resolution global ocean tide models.
The basictheory of ocean tide loading effect on satellite gravity is introduced detailedly. And three global ocean tide models with different resolutionare used to estimate the loading effect up to harmonic degree 60,and the difference of the three ocean tide models is considered as the error estimation respectively. The comparison betweenthe numerical results and the standard deviation of gravity recovered with GRACE shows that the effect of ocean tide on satellite gravity is more serious than the error of the GRACE below degree 31. Although the accuracy of ocean tide models are improved with development of satellite altimetry,the current ocean tide models are not accurate enough for ocean tide correction to the GRACE below degree 12. The resolution of global ocean tide models has been improved,the whole accuracy of the global ocean tide models has been limited by the complex coastal areas and irregular coastlines. The accuracy of ocean tide correction to satellite gravity were improved by hybriding china local tide model and different resolution global ocean tide models.
引文
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Balmino G.2001.New space missions for mapping the earth’s gravity field[J].Comptes Rendus de l’Académie des Sciences-Series IV-Physics,2(9):1353-1359.
Egbert G D,Bennett A F,Foreman M G G.1994.TOPEX/POSEIDONtides estimated using a global inverse model[J].Journal of Geophysical Research,99(C12):24821-24852.
Egbert G D,Erofeeva S Y.2002.Efficient inverse modeling of barotropic ocean tides[J].Journal of Atmospheric and Oceanic Technology,19(2):183-204.
Han S C,Jekeli C,Shum C K.2004.Time-variable aliasing effects of ocean tides,atmosphere,and continental water mass on monthly mean GRACE gravity field[J].Journal of Geophysical Research,109(B4):B04403.
Knudsen P,Andersen O,Khan S A,et al.2001.Ocean tide effects on GRACE gravimetry[A].//Sideris M G ed.Gravity,Geoid and Geodynamics 2000.International Association of Geodesy Symposia[M].Berlin,Heidelberg:Springer,159-164.
Lyard F,Lefevre F,Letellier T,et al.2006.Modelling the global ocean tides:Modern insights from FES2004[J].Ocean Dynamics,56(5-6):394-415.
Ning J S.2003.Satellite gravity surveying technology and research of earth’s gravity field[J].Journal of Geodesy and Geodynamics,23(S1):1-7.
Ray R D.1999.A global ocean tide model from TOPEX/POSEIDONaltimetry:GOT99.2[R].Greenbelt,MD United States:NASAGoddard Space Flight Center.
Ray R D,Eanes R J,Egbert G D,et al.2001.Error spectrum for the global M2ocean tide[J].Geophysical Research Letters,28(1):21-24.
Sun H P,Ducarme B,Xu H Z,et al.2005b.Adaptability of the ocean and earth tidal models based on global observations of the superconducting gravimeters[J].Science in China Series D-Earth Sciences(in Chinese),48(11):1859-1869.
Sun H P,Xu H Z,Zhou J C,et al.2005a.Latest observation results from superconducting gravimeter at station Wuhan and investigation of the ocean tide models[J].Chinese Journal of Geophysics(in Chinese),48(2):299-307,doi:10.3321/j.issn:0001-5733.2005.02.010.
Sun W K.2002.Satellite in low orbit(CHAMP,GRACE,GOCE)and high precision earth gravity field:The latest progress of satellite gravity geodesy and its great influence on geoscience[J].Journal of Geodesy and Geodynamics(in Chinese),22(1):92-100.
Wahr J,Molenaar M,Bryan F.1998.Time variability of the Earth’s gravity field:Hydrological and oceanic effects and their possible detection using GRACE[J].Journal of Geophysical Research,103(B12):30205-30229.
Wang C Q,Xu H Z,Zhong M,et al.2015.A study on the effect of ocean tides error in GRACE temporal gravity field recovery[J].Chinese Journal of Geophysics(in Chinese),58(9):3072-3079,doi:10.6038/cjg20150905.
Wu Z L,Liu Y X,He X F,et al.2017.Inversion of ocean tidal loadings of marine constituents based on the GPS measurements in the offshore islands[J].Chinese Journal of Geophysics(in Chinese),60(1):61-69.
Zhao H.2013.The research of effect and model refinement of ocean tide loading(in Chinese)[Master’s thesis].Xi’an:Chang’an University.
Zhao H,Zhang Q,Qu W,et al.2014.Ocean tied loading effect on troposphere zenith delay estimation sloved by GPS[J].Journal of Geodesy and Geodynamics(in Chinese),34(3):63-67.
Zhao H,Zhang Q,Qu W,et al.2016.Effect analysis of ocean tide loading on GPS precise positioning combining high precision local tide model with global ocean tide model[J].Geomatics and Information Science of Wuhan University(in Chinese),41(6):765-771.
Zhou J C,Sun H P.2005.Effect of ocean tide loading on GPS baseline measurement[J].Journal of Geodesy and Geodynamics(in Chinese),25(4):27-32.
Zhou J C,Sun H P.2007.Effect of ocean tide on recovery of satellite gravity field[J].Chinese Journal of Geophysics(in Chinese),50(1):115-121,doi:10.3321/j.issn:0001-5733.2007.01.016.
孙和平,Ducarme B,许厚泽,等.2005b.基于全球超导重力仪观测研究海潮和固体潮模型的适定性[J].中国科学D辑地球科学,35(7):649-657.
孙和平,许厚泽,周江存,等.2005a.武汉超导重力仪观测最新结果和海潮模型研究[J].地球物理学报,48(2):299-307,doi:10.3321/j.issn:0001-5733.2005.02.010.
孙文科.2002.低轨道人造卫星(CHAMP、GRACE、GOCE)与高精度地球重力场---卫星重力大地测量的最新发展及其对地球科学的重大影响[J].大地测量与地球动力学,22(1):92-100.
王长青,许厚泽,钟敏,等.2015.海潮误差对GRACE时变重力场解算的影响研究[J].地球物理学报,58(9):3072-3079,doi:10.6038/cjg20150905.
吴志露,刘焱雄,何秀凤,等.2017.基于近岸海岛GPS数据反演海洋分潮负荷影响[J].地球物理学报,60(1):61-69.
赵红.2013.海潮负荷影响及其模型精化研究[硕士论文].西安:长安大学.
赵红,张勤,瞿伟,等.2014.海潮负荷对利用GPS解算对流层天顶延迟的影响[J].大地测量与地球动力学,34(3):63-67.
赵红,张勤,瞿伟,等.2016.联合中国近海海潮模型与全球海潮模型分析海潮负荷对GPS精密定位的影响[J].武汉大学学报·信息科学版,41(6):765-771.
周江存,孙和平.2005.海潮负荷对GPS基线的影响[J].大地测量与地球动力学,25(4):27-32.
周江存,孙和平.2007.海潮对卫星重力场恢复的影响[J].地球物理学报,50(1):115-121,doi:10.3321/j.issn:0001-5733.2007.01.016.
Balmino G.2001.New space missions for mapping the earth’s gravity field[J].Comptes Rendus de l’Académie des Sciences-Series IV-Physics,2(9):1353-1359.
Egbert G D,Bennett A F,Foreman M G G.1994.TOPEX/POSEIDONtides estimated using a global inverse model[J].Journal of Geophysical Research,99(C12):24821-24852.
Egbert G D,Erofeeva S Y.2002.Efficient inverse modeling of barotropic ocean tides[J].Journal of Atmospheric and Oceanic Technology,19(2):183-204.
Han S C,Jekeli C,Shum C K.2004.Time-variable aliasing effects of ocean tides,atmosphere,and continental water mass on monthly mean GRACE gravity field[J].Journal of Geophysical Research,109(B4):B04403.
Knudsen P,Andersen O,Khan S A,et al.2001.Ocean tide effects on GRACE gravimetry[A].//Sideris M G ed.Gravity,Geoid and Geodynamics 2000.International Association of Geodesy Symposia[M].Berlin,Heidelberg:Springer,159-164.
Lyard F,Lefevre F,Letellier T,et al.2006.Modelling the global ocean tides:Modern insights from FES2004[J].Ocean Dynamics,56(5-6):394-415.
Ning J S.2003.Satellite gravity surveying technology and research of earth’s gravity field[J].Journal of Geodesy and Geodynamics,23(S1):1-7.
Ray R D.1999.A global ocean tide model from TOPEX/POSEIDONaltimetry:GOT99.2[R].Greenbelt,MD United States:NASAGoddard Space Flight Center.
Ray R D,Eanes R J,Egbert G D,et al.2001.Error spectrum for the global M2ocean tide[J].Geophysical Research Letters,28(1):21-24.
Sun H P,Ducarme B,Xu H Z,et al.2005b.Adaptability of the ocean and earth tidal models based on global observations of the superconducting gravimeters[J].Science in China Series D-Earth Sciences(in Chinese),48(11):1859-1869.
Sun H P,Xu H Z,Zhou J C,et al.2005a.Latest observation results from superconducting gravimeter at station Wuhan and investigation of the ocean tide models[J].Chinese Journal of Geophysics(in Chinese),48(2):299-307,doi:10.3321/j.issn:0001-5733.2005.02.010.
Sun W K.2002.Satellite in low orbit(CHAMP,GRACE,GOCE)and high precision earth gravity field:The latest progress of satellite gravity geodesy and its great influence on geoscience[J].Journal of Geodesy and Geodynamics(in Chinese),22(1):92-100.
Wahr J,Molenaar M,Bryan F.1998.Time variability of the Earth’s gravity field:Hydrological and oceanic effects and their possible detection using GRACE[J].Journal of Geophysical Research,103(B12):30205-30229.
Wang C Q,Xu H Z,Zhong M,et al.2015.A study on the effect of ocean tides error in GRACE temporal gravity field recovery[J].Chinese Journal of Geophysics(in Chinese),58(9):3072-3079,doi:10.6038/cjg20150905.
Wu Z L,Liu Y X,He X F,et al.2017.Inversion of ocean tidal loadings of marine constituents based on the GPS measurements in the offshore islands[J].Chinese Journal of Geophysics(in Chinese),60(1):61-69.
Zhao H.2013.The research of effect and model refinement of ocean tide loading(in Chinese)[Master’s thesis].Xi’an:Chang’an University.
Zhao H,Zhang Q,Qu W,et al.2014.Ocean tied loading effect on troposphere zenith delay estimation sloved by GPS[J].Journal of Geodesy and Geodynamics(in Chinese),34(3):63-67.
Zhao H,Zhang Q,Qu W,et al.2016.Effect analysis of ocean tide loading on GPS precise positioning combining high precision local tide model with global ocean tide model[J].Geomatics and Information Science of Wuhan University(in Chinese),41(6):765-771.
Zhou J C,Sun H P.2005.Effect of ocean tide loading on GPS baseline measurement[J].Journal of Geodesy and Geodynamics(in Chinese),25(4):27-32.
Zhou J C,Sun H P.2007.Effect of ocean tide on recovery of satellite gravity field[J].Chinese Journal of Geophysics(in Chinese),50(1):115-121,doi:10.3321/j.issn:0001-5733.2007.01.016.
孙和平,Ducarme B,许厚泽,等.2005b.基于全球超导重力仪观测研究海潮和固体潮模型的适定性[J].中国科学D辑地球科学,35(7):649-657.
孙和平,许厚泽,周江存,等.2005a.武汉超导重力仪观测最新结果和海潮模型研究[J].地球物理学报,48(2):299-307,doi:10.3321/j.issn:0001-5733.2005.02.010.
孙文科.2002.低轨道人造卫星(CHAMP、GRACE、GOCE)与高精度地球重力场---卫星重力大地测量的最新发展及其对地球科学的重大影响[J].大地测量与地球动力学,22(1):92-100.
王长青,许厚泽,钟敏,等.2015.海潮误差对GRACE时变重力场解算的影响研究[J].地球物理学报,58(9):3072-3079,doi:10.6038/cjg20150905.
吴志露,刘焱雄,何秀凤,等.2017.基于近岸海岛GPS数据反演海洋分潮负荷影响[J].地球物理学报,60(1):61-69.
赵红.2013.海潮负荷影响及其模型精化研究[硕士论文].西安:长安大学.
赵红,张勤,瞿伟,等.2014.海潮负荷对利用GPS解算对流层天顶延迟的影响[J].大地测量与地球动力学,34(3):63-67.
赵红,张勤,瞿伟,等.2016.联合中国近海海潮模型与全球海潮模型分析海潮负荷对GPS精密定位的影响[J].武汉大学学报·信息科学版,41(6):765-771.
周江存,孙和平.2005.海潮负荷对GPS基线的影响[J].大地测量与地球动力学,25(4):27-32.
周江存,孙和平.2007.海潮对卫星重力场恢复的影响[J].地球物理学报,50(1):115-121,doi:10.3321/j.issn:0001-5733.2007.01.016.