User Manual - pancroma

preprocess it before doing so. Some Landsat TIR files are archived the samesize as the multispectral band files. However most are archived as 57 or 60mresolution files, i.e. half the resolution of the multispectral bands. In addition,there are usually two TIR band files with suffixes 61a and 61b. These are thehigh gain and low gain versions of the data. If you choose to use the TIR band,you will be prompted to tell PANCROMA which type of file you are processing bychecking a radio button on the TOA Reflectance Form.In order to use a TIR band at half resolution, you must first expand andinterpolate it up to 27.5 or 30m resolution. This can be done using the utilitydescribed in Section XX. Once the scale is adjusted, it can be used to generatea Point Spectrum.When PANCROMA TM processes the TIR band, it will divide the computedtemperature in degrees Kelvin by a factor of 1000. This scales the temperaturedata so that it is of the same order of magnitude as the TOA reflectance data.You can select the multispectral band that you want to be displayed for pointselection by checking the appropriate radio button.After opening your multispectral bands, the Spectral Criteria Form will bedisplayed as shown below.There are six (or seven if you use the TIR band) track bar sliders correspondingto the six input Landsat bands. Beneath each one is a radio button that lets youselect between ‘Must Exceed’ and ‘Less Than’ as level qualifiers.239