Calibration Files

General User Notes

Absolute Reflectance Files for FSF Reference Panels The faculty supplies Spectralon reference panels for diffuse reflectance measurements with the field spectroradiometers. The surface of these panels is very fragile and great care must be taken to avoid damage or contamination during field use. Each panel has a unique absolute reflectance calibration file for the spectral range 350 to 2500nm. The spectral reflectance of the panels are compared to a calibrated laboratory standard panel with new calibration files issued annually in an Excel file. The absolute reflectance values stored is this file are used by the FSF Excel templates to convert the relative reflectance data to absolute reflectance values.

Radiometric Calibration Files for FSF Field Spectroradiometers The Field Spectroscopy Facility performs routine spectral radiance and irradiance calibrations on its spectroradiometers and their accessories using the NPL calibrated standards. The system spectral response calibration files for each spectroradiometer and its optional input optical accessories are stored in the Excel file. This calibration data is used by the FSF Excel templates to convert the raw data numbers from the spectroradiometer into calibrated spectral radiance or irradiance values.

Please contact FSF staff if you require further details or are seeking one of the previous year's calibration files.