38 4 2013 4 GeomaticsandInformationScienceofWuhanUniversity Vol.38No.4 Apr.2013 :1671-8860(2013)04-0426-05 :A GRACE GPS 1 12 3 1 (1 (2 (3 : 利用 2009-05~2010-12 共 20mon 的 GRACE 时变重力场反演了山西省境内陆地水储量变化造成的 地表垂直位移 并与同期的 GPS 高程残差进行了比较结果显示 对大部分 CORS 站而言 GRACE 反演的 水文地壳垂向形变与 GPS 高程残差时间序变化量均在 -6~6mm 之间 ; 由二者提取的年周期信号平均振幅 均为 2.5mm 左右 但是相位存在较大差异由于 GPS 数据处理过程未考虑周日 半周日大气潮汐 高阶电离层 及非潮汐海潮的影响 这三项误差会传播到测站坐标的时间序列 对 GPS 周年信号产生影响 所以可以 认为 GRACE 与 GPS 结果的差异更多的是来自 GPS 数据处理的误差 :GRACE; 地表垂向位移 ;GPS 形变监测 :P228.42 [1] GRACE 2002-03 GRACE GPS IGS mm GPS 1 CORS 2009-05~2010-12 20mon GRACE CORS GPS 95% ~ 100% 54 CORS 1 Fig.1 LocationofCORSSitesinShanxiProvince 1 GRACE GRACE GPS (CSR)GSMRL04 2009-05~2010-12 20mon :2013-03-20 : (40637034); (111026 114055); (2011M500886)
38 4 : GRACE GPS 427 C 20 ; [2] SLR C 20 GRACE GSM ; 15 30s; IGS 20mon GPS GPS GRACE GRACE [3] : l dr(θλ)= R l=1 h l 珚 P lm (cosθ) m=1 1+k l (1) (C lmcos(mλ)+s lmsin(mλ)) dr(θλ) ;h l k l l ~2010 ) 60 ; 珚 P lm (cosθ) (2) ;C lm S lm 10 GRACE mm 2 GRACE (1) Jekeli 2009-05~2010-12 W (α) [4] 1.5 mm : l dr(θλ)= R l=1 h l W - lp lm(cosθ) m=1 1+k l (2) (C lmcos(mλ)+s lmsin(mλ)) W l L W l GRACE GL- DAS ; GLDAS [3] GRACE GRACE GPS 500km GRACE GLDAS GRACE GPS GRACE GLDAS [5] GRACE GLDAS 2 GPS 54 CORS ( 1 )2009-05~2010-12 20 mon GPS 2009 7 8 GAMIT 3 GPS GRACE 1 54 CORS GLDAS 38a(1979 GLDAS GRACE : GRACE 330km 3 8 CORS GRACE GPS U GRACE GPS -6 ~6 mm 2010 GRACE : LC GPS8 CORS GRACE ; niel CORS GRACE ; GRACE
428 2013 4 GPS (2009 7 2010 ) GRACE GPS GPS GRACE RMS 2 CORS RMS 2 GPS GRACE RMS 2 RMS 2 GPS GRACE jiac hond RMS RMS GRACE 54 CORS Fig.2 RMSReductionPercentageinGPS Height 2 RMS ResidualswhenTotalGRACESignalisRemoved GPS GRACE RMS 3 wutahureanzeyucikelalishheshwenx GPS U GRACE Fig.3 ComparisonBetweenU ComponentofGPSCoordinateAnomaliesandVerticalElasticDeformation Derivedfrom GRACEforwutahureanzeyucikelalishheshandwenx 4 GRACE GPS : GRACE 2 4(a) GRACE ; GRACE [6] GRACE 54 2.5mm 4(b) GPS GRACE GPS 2~4mm GRACE GRACE GPS CORS GPS GRACE 1 GRACE GPS 1 4 GRACE GPS Fig.4 AnnualAmplitudeofGRACEandGPSSignals
38 4 : GRACE GPS 429 GRACE GPS 10 mm GPS fes2004 11 GPS 351.4d [7] 175.7d ; GPS GRACE Tab.1 1 GRACE GPS AnnualAmplitudeandPhaseDerivedfrom GRACEandGPS GRACE GPS /mm /rad /mm /rad GRACE GPS /mm /rad /mm /rad anze 2.60±0.06-0.56±0.02 3.15±0.98 1.05±0.32 piag 2.56±0.06-0.56±0.02 2.89±1.03 0.57±0.34 dani 2.62±0.06-0.55±0.02 2.82±1.01 0.67±0.35 pinl 2.63±0.06-0.55±0.02 2.90±1.07 0.72±0.36 dtxz 2.52±0.06-0.57±0.02 3.57±1.07 0.68±0.29 qins 2.60±0.06-0.56±0.02 2.57±1.01 0.87±0.39 gaop 2.58±0.06-0.56±0.02 2.71±0.97 1.02±0.36 qiny 2.59±0.06-0.56±0.02 2.64±0.97 0.67±0.36 heji 2.63±0.06-0.55±0.02 1.76±1.03 1.09±0.60 senc 2.56±0.06-0.56±0.02 2.13±1.01 0.90±0.48 hesh 2.55±0.06-0.56±0.02 1.72±0.96 0.82±0.56 tunl 2.58±0.06-0.56±0.02 2.73±0.96 0.78±0.35 jiex 2.59±0.06-0.56±0.02 1.70±0.94 1.35±0.57 wenx 2.62±0.06-0.55±0.02 2.80±1.03 0.99±0.37 jinc 2.59±0.06-0.56±0.02 3.31±0.95 1.39±0.29 xing 2.58±0.06-0.56±0.02 2.16±1.01 0.72±0.46 jixi 2.62±0.06-0.55±0.02 2.67±1.03 1.12±0.40 xinz 2.56±0.06-0.56±0.02 2.56±0.98 0.83±0.38 lchu 2.58±0.06-0.56±0.02 3.73±0.94 1.12±0.26 yohe 2.62±0.06-0.55±0.02 2.11±1.01 1.08±0.48 lich 2.57±0.06-0.56±0.02 2.02±0.94 1.07±0.47 yonj 2.64±0.06-0.55±0.02 2.52±1.07 1.21±0.43 ling 2.59±0.06-0.56±0.02 2.30±1.00 0.74±0.43 yuci 2.57±0.06-0.56±0.02 2.79±0.97 0.72±0.34 liul 2.60±0.06-0.56±0.02 2.44±1.01 0.64±0.41 yuqu 2.62±0.06-0.55±0.02 3.22±1.03 0.90±0.32 louf 2.58±0.06-0.56±0.02 2.90±1.00 0.72±0.34 yush 2.57±0.06-0.56±0.02 4.31±0.93 1.19±0.22 4 GPS GPS GRACE GPS ; GRACE 54 CORS GRACE GPS -6~6 mm GPS [1] FarrelW E.DeformationoftheEarthbySurface GRACE Loads[J].RevGeophys197210:761-797 [2] CORS Cheng MTapleyB D.VariationsintheEarth s RMS 15% ~40% OblatenessDuringthePast28Years[J].JGeophys GPS GRACE Res2004109:135-143 GPS [3] WahrJMolenaarMBryanF.Time-Variabilityof theearth sgravityfield:hydrologicalandoceanic GRACE GPS EfectsandTheirPossibleDetectionUsingGRACE 2.5mm [J].J Geophys Res1998103(B12):30205-30230 [4] JekeliC.AlternativeMethodstoSmooththeEarth GPS sgravityfield[r].dep.ofgeod.sci.andsurv. GRACE OhioStateUniv.Columbus1981 [5] SwensonSChambersDWahrJ.EstimatingGeo- GPS center Variationsfrom a Combination of GRACE GRACE andocean ModelOutput[J].JournalofGeophysi- [8-9] calresearch2008113:114-125 GPS [6] ChenJLWilsonC RFamiglietiJSetal.At- tenuation Efects on Seasonal Basin-Scale Water ; GPS StorageChangeFrom GRACE Time-VariableGrav-
430 2013 4 ity[j].jgeodesy200781(4):237-245 derionosphericefectsonthegpsreferenceframe andvelocities[j].journalofgeophysicalresearch 2010115:107-114 33(11):1106-1109 [9]. GPS [J]. 200833(1): [8]. GPS : GRACE [J]. 2008 E-mail:lrlwuhan@yahoo.cn 6-8 ComparingVerticalSurfaceDisplacementsUsingGRACEandGPS overshanxiprovince LIU Renli 1 LI Jiancheng 12 JIANG Weiping 3 LI Zhao 1 (1 SchoolofGeodesyandGeomaticsWuhanUniversity129LuoyuRoadWuhan430079China) (2 KeyLaboratoryofGeospaceEnvironment& GeodesyofMinistryofEducationWuhanUniversity 129LuoyuRoadWuhan430079China) (3 ResearchCenterofGNSSWuhanUniversity129LuoyuRoadWuhan430079China) [7] PetrieEJKing M AMoorePetal.Higher-Or- Abstract:Hydrologicalprocessescausevariationingravitationalpotentialandsurfacede- formationsbothofwhicharedetectableusingspacegeodetictechniques.wecomputedsur- faceverticaldisplacementsduetoinlandwaterstoragechangesusinggracetime-variable gravityfieldforgorssitesinshanxiprovinceduringfrom May2009toDec.2010and comparedtheresultswithgpsheightresidualsduringthesameperiod.theresultsdemon- stratethatvariationsofhydrologicalsurfacedeformation derivedfrom GRACE and GPS heightresidualtimeseriesformostcorssitesarebothabout!6.0mm.theaverageam- plitudesofannualsignalextractedfrom GRACEandGPSarebothabout2.5mmhowever thephasediscrepencyislarge.sincenocorrectionswereappliedfordiurnalandsemi-diurnal atmosphericloadinghighorderionosphereandnon-tidaloceanloadingwhichwouldprop- agateintositecoordinatestimeseriesandafectgpsannualsignals.thereforwebelieve thatthedisagreementbetweengraceandgpsismoreduetoerrorsinthegpsdatapro- cessing. Keywords:GRACE;surfaceverticaldisplacement;GPSdeformationmonitorin Aboutthefirstauthor:LIURenliPh.DmajorsinapplicationofGRACEsatelite. E-mail:lrlwuhan@yahoo.cn