User Manual - pancroma

SPOT ® Point Spectrum Generator TMThe SPOT Point Spectrum Generator TM accepts SPOT DN bands 1.2.3 and 4.These are DN bands so TOA reflectances will be computed. To use it, open fourSPOT multispectral band files as described in the previous section. The select‘Spectral Analysis’ | ‘SPOT Point Spectrum Generator’ | ‘Four DN Bands’. ThePoint Spectrum Data Entry box and band1 image will be presented as describedin the previous section. Afterwards, data entry box will be displayed for enteringthe appropriate TOA Reflectance data. The data entry is similar to that describedabove.You will have to enter the SPOT Absolute Calibration Gain for each band. Thesevary from image to image so they must be obtained from the metadata for eachSPOT scene. In order to enter SPOT Absolute Calibration Data, enter the datafor band1 and click ‘OK’. The band slider will automatically advance to the band2position. Now enter the band2 data and click ‘OK’. Repeat for band3 and band4.When you click ‘OK’ for the fourth time, the reflectances will be computed and thespectrum displayed.NAIP Point Spectrum Generator TMThe NAIP Point Spectrum Generator TM accepts NAIP DN bands 1.2.3 and 4.Calibration data is not provided with NAIP data, so false TOA reflectances arecomputed. To use it, open four NAIP multispectral band files as described in theUsing NAIP Data section of this manual. The select ‘Spectral Analysis’ | ‘NAIPPoint Spectrum Generator’ | ‘Four 8-Bit DN Files’. The Point Spectrum DataEntry box and band 1 image will be presented as described in the previoussection. Select your data points by clicking on the image. When you are finishedselecting, Click ‘OK’ the false reflectances will be computed and the spectrumdisplayed.EO1-ALI/Hyperion Point Spectrum Generator TMThe EO1-ALI Point Spectrum Generator TM accepts EO-1 ALI bands2,3,4,5,6,7,8,9 and 10 or alternatively any nine Hyperion bands. These are I16DN bands so TOA reflectances will be computed. To use it, open the nine EO-1ALI DN multispectral band files as described in the previous section. The select‘Spectral Analysis’ | ‘EO-1 ALI Point Spectrum Generator’ | ‘Nine DN Bands’.The Point Spectrum Data Entry box and band1 image will be presented asdescribed in the previous sections. You must input the Solar Elevation Angleand Acquisition Date. The reflectances will be computed and the spectrumdisplayed.World View 2 ® Point Spectrum Generator TM230