Sensor Spectral Configuration

The third step to define a new LUT configuration is to specify the Sensor Spectral Configuration, which will set the wavelengths at which the RTM will calculate the atmospheric transfer functions.

The user can define his/her own sensor spectral configuration by adding new bands () and edit their values (i.e., spectral range and resolution) directly on the table. The user can also remove bands by selecting them () and pressing the button.

In addition, pre-defined spectral configuration from one or more sensors can be loaded from the Sensorconf.xml file by selecting them on the menu on the right and press the Add sensor(s) button. ALG will automatically determine the minimum/maximum wavelength range and spectral resolution of each spectral band. Note that ALG will assign a spectral oversampling factor ×10 higher than the corresponding sensor spectral resolution (FWHM) and adapt the spectral range (min/max wavelength values) so that spans a factor ×1.25 of the sensor FWHM.

Once defined the LUT spectral configuration, the user should click on the Next button at the bottom-left corner to proceed to the last step: Advanced Parameters. This will update the LUT configuration .xml file (e.g., C:\ALG\LUTs_folder\LUTfile.xml), storing the sensor spectral configuration for its later use in the execution of the atmospheric RTMs and generation of input data.