InSAR系列讲座2-SAR成像原理与图像特征

InSAR2SAR刘国祥(西南交通大学测量工程系,四川成都,610031)[]InSAR,InSAR)))(SAR)SAR[]SAR;;SAR;[]P237[]A[]1001-8379(2004)03-0141-03PrinciplesofImagingSARandCharacteristicsofSARImageLIUGuo-xiang(Dept1ofSurveyingEngineering,SouthwestJiaotongUniversity,Chengdu610031,China)Abstract:Asthesecondpartofthetutorial,thepaperwillintroducethebasicprinciplesofimagingsensorofsyntheticaper-tureradar(SAR)andthecharacteristicsofSARimage1Keywords:imagingSARsensor;principles;SARimage;imagecharacteristics1InSARIn-SAR,(SAR)SAR,,InSARSAR,,,SAR(Sidelooking),,SAR21H0,,XVw,:XV=Kw(1),K;XhL,:Xh=KL(2)(footprint),,(backscattering),,2,,R,,(swath),WG:WGUKRmwcosG(3),Rm,G1214127320049,,,3,(azimuth)(slantrange)$X$R,$Y,$Y(2),:$X=RXh=RKL(4),R,$X:$R=cSp2(5)$Y=$Rcos(90b-Hi)=cSp2cos(90b-Hi)(6),c,Sp,HiHi,Hi,$R,$Y,,,,,,0,,,,,,(4)~(6),,,,ERS-1/2(C,K=5166cm),10m,3km,,,,33,,,CarlWiley(Dopplerfrequencyshift)4Labc,O,O,,,(sharpening),(4),,$X:$X=L2(7),ERS-1/2,10m,54,/(focusing)SAR,,/04SARSAR,(),(a+b#i),Pixel]a+b#i=a2+b2ei«(8)14227320049,a2+b2(),«=tan-1(b/a)SAR,,,SAR,,SAR(),,,(multilooking),,InSAR,5,R(),,QŠi,,5SAR,,,,,,SAR,(foreshortening)(lay-over)(shadowing)3SAR[1]Liu,Guoxiang1MappingofEarthDeformationswithSatelliteRadarInterferometry:AStudyofItsAccuracyandReliabilityPerformances[D]1Ph1D1thesis:Dept1ofLandSurveying&Geo-Informatics,TheHongKongPolytechnicUniversity,pp1250,20031[2],,,,1SAR[J]1,2001,30:60-661[3],,,,1In-SARDEM[J]1,2001,30:336-3421[4],,1InSAR[J]1,2001,8:10-121[5]1[M]1:,19961[]2004-08-06[](1968-),,,,GIS(:40374003)14327320049