地理所与北京数字空间一简乐GE0CODINGGAMMA软件的GE0模块或DIFF&GE0模块中的GE0功能主要是完成range_Doppler坂标系与地图投影之间的转换。其次,可以生成地图投影坐标系下的SAR强度图,作为一种副产品;还可以提供SAR坐标系汉的DEM数据,用于后续的差分干涉处理。G6ocoding的分类:。GEC-GeocodedE11ipsoidCorrected不需要DEM数据GTC-GeocodedTerrainCorrected需要DEM数据,DEM在地图投影坐标系或SAR坂标系下-万Geocoding的主要步骤:*(1)地理空间转换的初始欧定一一LUT*(C2)空间转换的优化。(C3两种坐标系下影像数据的互采样LUTLookUpTable:T有两种类型,一种是与SAR坂标系下影司维的,一种是与地图投影坐标系下影同维的。0像像Geocoding流程图:donDEMsspmalDBnmodut:fiserdefoedrmeolioal。Lncllinatoneeamgk。Tochielsixe1,LyoershstowapIgemdingbotpbtsBinatedStRintndyinageT4SARloMAPMAPaantiales“Iienity.ColeeneeIoolapte,06M*bsbsadcn。DBMPaduct,InSARpaduet。Lniueineaon,Difceatilpoduesaa,G6Lygee,TnnomelpodutMAPStR,TnsfmeipodutfomMAPcriatsIootpttefomARcorlinacs2小IFF差分有“二轨“三轨“和“四软“之分,在实际应日门差分“,即利去除。得最多的是“二一外部DEM数据进行地形的DIFF流程:nnErnEeserpnoeeranmweeeseryneae-Eneromrenszho、bnaresierenhl、/nalronieraco、/ssrenierentaaiacoroaneocgaoraasetmacnereaevatmaoneneeeerndneneattnaonnnecausomeah_ssnAnPProoaomriaporanmaimae怀EevrnaeseeaUnroconeeravrodeneesnnpanEeepan一一一cnsmmtanzisnmaninnnmanieecn画An二实例操作一,GE0一GTICwithaDEMinmapgeometry数据:960523.sl1c,960523.par;LV.dem_par,LV.dem(inEQAprojection)SARimagesize:2500#1800巳21对SLC的多视处理:tlti_look960523.slc960523.par960523.mli960523.mli.par15(2初妒LUT的生成及DEMSAR影像的模拟:gC_map960523.mli.par-LV.dem_parLV,demdem_seg_pardem_segeqa_rde44sim_sardem_seg:3160主2028)Tasshddem_seg31602525101145,135.disrasdem_seg.Tasgeocodeeqa_rdesim_sar3160nsim_Sar2500180010FaSpWrnsim_sar250010111.35dis2rasnsim_sar,Tas960523.mli.ras(3)LUT的优化:利用偏移量多项式优化LUT“dis2pwr960523.mlinsin_sar(找出偷移量)ycreate_diff_par960523.mli.par-960523.diff_par1(人工输|一“入偏移量)一一一一说明;偏移可以用init_offsetm和令自动生成“offset_pWrm960523.mlinsim_sar960523.diff_par“offssnr512“512offsets1887.0“offset_付tmoffssnr960523.diff_parcoffscoffsets7.03*offset_pwrm960523.mlinsinm_sar960523.diff_par“offssnr128128offsets224247.0(可选择项)offset_仪tmoffssnr960523.diff_parcoffscoffsets7.03gC_map_fineeqa_rde3160960523.diff_parneda_rde1(LUT的化)