Automobile-based SAR-InSAR system for ground experiments

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1、IEEEGEOSCIENCEANDREMOTESENSINGLETTERS,VOL.3,NO.3,JULY2006401Automobile-BasedSAR/InSARSystemforGroundExperimentsByung-LaeCho,Young-KyunKong,Hyung-GeunPark,andYoung-SooKim,Member,IEEEAbstract—Anautomobile-basedsyntheticapertureradar(SAR)systemnamedAutoSARisdescribed.ItisanexperimentalSAR

2、systemoperatingontheground,whichwasdevelopedbythePohangUniversityofScienceandTechnology,Korea.AutoSARcanalsooperateasaninterferometricSAR(InSAR)whenoneadditionalreceivingantennaisused.TheswathofAutoSARislessthan1km,andtheazimuthalcoverageislimitedonlybythestoragecapacityofthesystem.SAR

3、andInSARimagesobtainedatatestsitenearPohang,Korea,arepresented.Beingonanautomobile,thissystemcaneasilyobtainSARdataofanytargetareawithastraightroadnearby.IndexTerms—Ground-basedsyntheticapertureradar(GB-SAR)system,interferometricSAR(InSAR),SAR.I.INTRODUCTIONYNTHETICapertureradar(SAR)is

4、animportantandef-SficientEarth-observingtoolusingmicrowavefrequencies.Fig.1.BlockdiagramofAutoSAR.(AWG)Arbitrarywaveformgenerator,AlthoughSARsystemsareusuallyoperatedfromaircraftor(PCI)peripheralcomponentinterconnect,(ADC)analog-to-digitalconverter,orbitingsatelliteplatforms,ground-base

5、dSAR(GB-SAR)sys-(ant.)antenna.temshavealsobeenproposedasportablegeotechnicalinstru-ments[1]inthelastfewyears.ConventionalGB-SARsystemsTABLEIwerenormallybasedoncontinuous-wavestepped-frequencySPECIFICATIONOFAUTOSARradars,andthesyntheticaperturewasobtainedbymovingtheantennaalongahorizont

6、alrail.ArepresentativeinterferometricSAR(InSAR)wasthelinearSAR(LISA)oftheEuropeanCommission[2],[3].ThePohangUniversityofScienceandTechnology(POSTECH)hasdesignedanddevelopedaSARsystemmountedonanautomobile,namedtheAutoSAR[4].AutoSARisafullyfocusedsystem,andtheazimuthresolutionisindepende

7、ntofrange,whereasthatofaconventionalGB-SARsystemwasnot.AutoSARhasfreedusfromtheburdenofmaintainingorcharteringanexpensiveairplaneforpreliminaryandexperimentalSARstudies.AutoSARcanalsobeemployedasanInSARforthestudyofterrainelevationmapping.Asthemaximumrangeislessthan1km,twoseparateant