05-InSAR系列讲座5InSAR系统中的误差传播

9228220056;;;P237A1001-8379(2005)02-0092-04ERRORPROPAGATIONININSARSYSTEMLIUGuo-xiang(Dept.ofSurveyingEngineering,SouthwestJiaotongUniversity,Chengdu610031,China)Abstract:Asthefifthpartofthetutorial,thepaperintroducesanddiscussesthesourcesoferrorsinelevation/deformationmeasurementsderivedwithInSAR,andconductsmodelingforthemainerrorsources(i.e.,interferometricphases,baselineparametersandtopographicdatasets)basedontheerrorpropagationlaw.Finallydiscussedistheinfluenceoferrorsintopographicdatasetsusedindifferentialinterferometryfordeformationmapping.Keywords:InSAR;errorsources;errorpropagation;errormodels34SARSAR1234[1]SARSAR[2]12325SAR32[3]SARSARJERS-1LSAR23.5cm)2822005693SARERS-1/2CSAR5.7cm[1]SARSARGPSInSAR[4]44344[1]SAR[-π+π]SAR11134InSARSARERS5-10cmJERS-1RADARSATZebker[5]1550358[5]1hssf31512000.20.40.60.81020406080100(deg)12481619428220056sfplqsfqplqs⊥=+=BRaBRh4sin)cos(4sin11(1)2hsyxBaBRhBaBRhsqssqscossin)/(sinsin)/(11==(2)aBBxcos=aBBysin=3331013dr/0100||sin4qfplRhBBdrm⊥--=(3)1102002||44tmBBBdrfplfpl⊥⊥--=.(4)0||•B0•⊥B335,000||cossinqq•••-=yxBBB(5)000sincosqq•••⊥+=yxBBB(6)/mdrsfpls4=(7a)xdrBRhsqqs)cot(sin100+=(8a)ydrBRhsqs)(cos10+=(9a)hRBdrsqs010sin⊥=(10a)mdrsfpls4=(7b)210100)cos4(sinxtdrBBsfqplqs⊥+=(8b)210100)sin4(cosytdrBBsfqplqs⊥+=(9b)101024tdrBBsfpls⊥⊥=(10b)100102sinxdrBBBsqs⊥⊥=(11)100102cosydrBBBsqd⊥⊥=(12)ERSSAR20001=⊥Bm5002=⊥Bm1dr[5]1ERS/drs(mm)drs(mm)mfo201.6mfo201.6xB10cm39.22xB10cm39.2zB5cm46.02zB5cm46.0H30m4.51tfo200.01xB10cm9.81zB5cm11.52822005695”SAR10a10b[1]DEMSAR1996ERS-1ERS-2199631819CSAR[1]DEMDEM16[1]GPSDEMDEM[1]LiuG.X.,MappingofEarthDeformationswithSatelliteRadarInterferometry:AStudyofItsAccuracyandReliabilityPerformances[D].Ph.D.thesis:Dept.ofLandSurveying&Geo-Informatics,TheHongKongPolytechnicUniversity,pp.250,2003.[2],,.InSAR[J].,Vol.8,pp.10-12,2001.[3]Zebker,H.A.,P.A.RosenandS.Hensley,Atmosphericeffectsininterferometricsyntheticapertureradarsurfacedeformationandtopographicmaps[J].JournalofGeophysicalResearch,Vol.102,pp.7547-7563,1997.[4]Li,Z.W.,X.L.DingandG.X.Liu,ModelingatmosphericeffectsonInSARwithmeteorologicalandcontinuousGPSobservations:algorithmsandsometestresults[J].JournalofAtmosphericandSolar-TerrestrialPhysics,Vol.66,pp.907-917,2004.[5]Zebker,H.A.,C.L.Werner,P.A.RosenandS.Hensley,AccuracyoftopographicmapsderivedfromERS-1interferometricradar[J].IEEETransactionsonGeoscienceandRemoteSensing,Vol.32,pp.823-836,1994.(1968-),,,,GIS(40374003)