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:2002210229;:2003203218:(1979-),,,SAR1,2,1,2,2(1.,100039;2.,100080):SAR,,,:SAR;;;:TP75:A:100420323(2003)02201032061(SAR)1,SARSAR,SAR,SAR2,3SAR,,SAR,SARSAR,,SAR,,,SAR,,,4SARSAR,2SARSAR,SAR5,SAR,8:6SAR211ttaT=t-ta,E-sinEe-GML3T=0,E,(JetPropulsionLaboratory)BruceE.Shapiro7,10-15,tgf2=1+e1-e18220034REMOTESENSINGTECHNOLOGYANDAPPLICATIONVol.18No.2Apr.2003tgE2,Efr=a(1-e2)1+ecosfr,212,,,,213SAR,,HH,,,,214,,3,492km,97,0.0015,,1(a),4m:-j4PR(t)K,SAR0.09m,,1(b),,0.012m,,,2(a)1,1015dB,,2,,,,,2(b),1419dB4011822(a)2(b),,fDfRfDfR,fDfR89,510-5m,,SAR4SAR,(3):s(t)=iDiWr[t-ri(t)öc]Wa[t-ri(t)öc]f[t-2ri(t)öc]=n=-iDiWr[t-ri(t)öc]Wa[t-ri(t)öc]f[t-nT-2ri(t)öc]:i,Di,Wr[],Wa[]LrLa$lr=Rfar-Rnear,$la=La:Nr=Tfs+$lrfsöc,Na=[KD(Rnear+$lr)+$la]PrföV1ö2,3($rga,$rgr)$rga=V2Prf,$rgr=c2fs(i,j)xi,rij(x-xi),Rcij(i,j)t=0,Rnear,:s(m,n)=ijsr(mPrföv-i$rga,nifsöc+2Rcij)=ijDijWa[mPrföv-i$rga]exp{-j[4Prij(mPrföv-i$rga)öK]-j5[nifsöc+2Rcij-2rij(mPrföv-i$rga)öc]}:-Na2mNa2,0nNr5012:SAR5SAR511SAR,,,,,,512SAR(1)xa=-Na2,,Na2-1,t(2)t,,(3),(4),,(5),(6),SAR,PRF,,,,6(1),RD,SAR,,4:2.2m,13.2dB,218m,14.9dB,5,9(2)150150,6(a),6(b)46011856,6(b),,,SAR7SAR,6,,SAR,,SAR,,:1.M.:,1989.2FranceschettiG,MigliaccioM,RiccioD,etal.SARAS:ASyntheticApertureRadar(SAR)RawSignalSimulatorJ.IEEETransonGeoscienceandRemoteSensing,1992,30(1):110123.3MocciaA,VetrellaS,SalvatorePonte.PassiveandActiveCalibratorCharacterizationUsingaSpaceborneSARSystemSimulatorJ.IEEETransonGeoscienceandRemoteSens2ing,1994,32(3):715721.4FT,RK,.()-M1:,1987.5RuiWang,RuliangYang.PRFSelectionforSyntheticAper2tureRadarinEllipseOrbitsR1SPIEConference,MicrowaveRemoteSensingoftheAtmosphereandEnviromentË,Oct,2002.6.M.:,1992.7ShapiroBE1(1):4756.9EldhusetK.ANewFourth-OrderProcessingAlgorithmforSpaceborneSARJ1IEEETrans.onAerospaceandElectron2icSystems,1998,34(3):824835.7012:SARAreaTarget’sRawDataSimulationofSpaceborneSARBasedonEllipticalOrbitWANFeng1,2,ZHAOYu2peng1,2,YANGRu2liang2(1.InstituteofElectronics,TheChineseAcademyofSciences,Beijing100080,China;2.GraduateSchool,TheChineseAcademyofSciences,Beijing100039,China)Abstract:Amethodofareatarget’srawdatasimulationofspaceborneSARbasedonellipticalorbitispre2sented.Foremost,basedonmodelsofsatellitewithellipticalorbitandtargetswithrotationoftheearth,thedistancebetweenthesatelliteplatformandtargetcanbeattained,whichiscomparedwiththeoneob2tainedbyothermodels.Theeffectofthedifferencebetweentheellipticalorbitmodelandcircleorbitmod2elontheazimuthcompressionisanalyzed.Anoptimummethodbasedonpolynomialmodelisbroughtout.Then,themethodandwholeprocedureofsimulatingareatarget’srawdataaredescribed.Thedetailedde2scriptionofmathmodelofareatarget’sechoesisgivenfirst.Followingarethestepsofsimulatingrawda2taofareatarget.Lastly,theimageofthecompressedrawdataisillustratedandanalyzed.Thevalidityofcompressionalgorithmisprovedbythecompressedresultofsinglepointtarget.Afterthecomparisonbe2tweenthecompressedimageofrawdatasimulatedandtheoriginalimage,theconclusioncanbereachedthatthispaper’smethodofsimulatingrawdataofareatargetisright.Keywords:SpaceborneSAR,Ellipticalorbit,Simulation,Areatarget80118