User Manual - pancroma

and 6. The files should be opened in numerical order, i.e. band1, band2,band3, band4, band5, band6 and band7.Then select ‘Spectral Analysis’ | ‘Landsat Point Spectrum Generator’ | ‘Six/SevenReflectance Bands’. The Point Spectrum Data Entry box and band1 image willbe presented as described in the previous section. Unlike the DN PSG, it is notnecessary to input the Solar Elevation Angle and Acquisition Date as thereflectance have of course already been computed and are stored in the inputfiles. The Reflectance PSG is otherwise exactly as described above.Please see the note on how the TIR band data is scaled in the LandsatReflectance Spectral Analyzer TM Section preceding this Section.Landsat 8 Point Spectrum Generator TMThe Landsat Point Spectrum Generator TM can also accommodate Landsat 8data. The procedure is exactly the same as described for Landsat 7 data exceptthat 8 input bands are required, Landsat 8 bands 1, 2, 3, 4, 5, 6, 7, and 9.ASTER Point Spectrum Generator TMThe ASTER Point Spectrum Generator TM (PSG) accepts ASTER DN bands4,5,6,7,8 and 9 or alternatively, ASTER DN bands 1,2,3,4,5,6,7,8 and 9. Theseare DN bands so TOA reflectances will be computed. To use it, open six or nineASTER multispectral band files as described in the previous section. Then select‘Spectral Analysis’ | ‘ASTER Point Spectrum Generator’ | ‘Six DN Bands’ or‘Spectral Analysis’ | ‘ASTER Point Spectrum Generator’ | ‘Nine DN Bands’ . ThePoint Spectrum Data Entry box and band1 image will be presented as describedin the previous section. You must input the Solar Elevation Angle andAcquisition Date. In addition, you must select the Gain settings from among‘High’, ‘Medium’, ‘Low 1’ and Low 2’ settings. This information can be found inthe ASTER metadata. The reflectances will be computed and the spectrumdisplayed.IMPORTANT NOTE: If you decide to use the three ASTER Very Near Infrared(VNIR) bands in addition to the six Short Wave Infrared (SWIR) bands, you willhave to rationalize the file sizes. The resolution of the VNIR bands is 15m/pixelwhile that of the SWIR bands is 30m/pixel. The file sizes can be rationalizedeither by resampling the VNIR bands down or interpolating the SWIR bands upusing the PANCROMA TM Resize utilities. Interpolating up is recommended inorder to avoid loss of information from the ASTER scene.IMPORTANT NOTE: PANCROMA TM wants the ASTER data in GeoTiff format.You may have to convert your data using the free MultiSpec utility beforeprocessing.229