ENVI下用TM數(shù)據(jù)做大氣校正

1、ENVI下有TM數(shù)據(jù)做大氣校正數(shù)據(jù)校準(zhǔn)(calibrationutility)打開(kāi)TM數(shù)據(jù)，單擊BasicTools”-”P(pán)reprocessing”-”CalibrationUtility”-”LandsatCalibration，如下圖WorldviewRadianceQUickAtmosphericCorrectionFlatFieldData-SpecificUtilitiesAVHRRLandsatCalibrationFLAASHCalibrationUtilitiesGeneralPurposeUtilitiesQuickBirdRadian匸呂WorldviewRadiance

2、QUickAtmosphericCorrectionFlatFieldData-SpecificUtilitiesAVHRRLandsatCalibrationFLAASHCalibrationUtilitiesGeneralPurposeUtilitiesQuickBirdRadian匸呂選擇要校準(zhǔn)的文件，然后會(huì)彈出下面的對(duì)話框ENVILandsatCalibrtioL：=LrLiiE：i+Satelli+pSensorsLandsat5THDataAcqui三iti皿Moiith:JuneHat：AcquieitionHay:HataAcquiitionie:eltSunElevation

3、(deg):DataAcquisitionBand:DataAcqui三iti皿Moiith:JuneHat：AcquieitionHay:HataAcquiitionie:eltSunElevation(deg):DataAcquisitionBand:C：=ilibr：=LticmTyp已9Radi:tlceRe1pr+:=ltlceEdit.ViiIuhe9Lrnitl-Ltti:elkEditCalibrationFarsunetEirEDu切utReSulttoQFileMemoryEiitEFOutputFi1erL：=uTieChooseE瓠遙感導(dǎo)番、數(shù)據(jù)譏emppreb2Com

4、press個(gè)選項(xiàng)是傳感器，選擇個(gè)選項(xiàng)是傳感器，選擇Landsat5TM,能在同一文件夾下ITL.txt中找到。其中“能在同一文件夾下ITL.txt中找到。其中“CalibrationType”選“Radiance”。二、波段疊加(LayerStacking)六個(gè)波段文件全部校準(zhǔn)后，再疊加到一起，成為一個(gè)文件。單擊”Map”-”LayerStacking”,彈出對(duì)話框，單擊“ImportFile.”，導(dǎo)入已校準(zhǔn)的波段文件，導(dǎo)入文件后單擊“ReorderFiles.”導(dǎo)入文件后單擊“ReorderFiles.”，調(diào)整波段的排列順序。輸入要保存的文件名，單擊“OK”。數(shù)據(jù)轉(zhuǎn)換(ConvertData

5、)常用的TM數(shù)據(jù)時(shí)BSQ(波段順序排列)格式的，而FLAASH大氣校正用的是BIL(波段按行交叉格式)的格式，所以要做數(shù)據(jù)轉(zhuǎn)換。單擊BasicTools”-”ConvertData(BSQ,BIL,BIP)”，彈出如下對(duì)話框OutputInterleave選擇BIL，輸入要導(dǎo)出的文件的名稱，單擊”O(jiān)K”。導(dǎo)出文件后要編輯新文件的頭文件。單擊”File”-”EditENVIHeader，選擇要編輯的文件，然后彈出對(duì)話框選擇波段，選擇合適的單位，在這里選擇“Nanometers”，在下方的文本框中輸入該波段的中心波長(zhǎng)。TM參與校正的六個(gè)波段的波長(zhǎng)分別是tm1485tm2560tm3660tm483

6、0tm51650四、編輯后單擊“OK”。進(jìn)行四、編輯后單擊“OK”。進(jìn)行FLAASH大氣校正單擊“BasicTools”-“Preprocessing”-“CalibrationUtility”-“FLAASH”。彈出如下對(duì)話框RootrL&iTiRforFLAASHFilesScent!CerLterLoca+iorLIHlUMSSensorT5TeNKNOWN-M：L注t000.UURootrL&iTiRforFLAASHFilesScent!CerLterLoca+iorLIHlUMSSensorT5TeNKNOWN-M：L注t000.UULonLlIU.UUSensorAltitude(kni)GrijutliIElyion.knjFiKelSize(m)FlightTimeGMT如d：0：0FlightDate2000AtmosphericModelIniti：=l1VisiLility(km.)4U.UURm-：AtmosphericModelIniti：=l1VisiLility(km.)4U.UURm-：ilWstErRetriev：il單擊InputRadianceWntE匕CulujTirLMuitipliType選擇Muitispectrai-LandsatTM5。GroundElevation丿口面填地i高程，北京