Radiometric calibration is provided through the use of a Labsphere USS-2000-V uniform light source.  This 20-inch diameter integrating sphere is capable of variable luminance output from 0 to 4000 foot-lamberts with a measured uniformity >98% over the entire 8-inch exit port.  This sphere carries a NIST-traceable spectral radiance calibration from 400 nm to 2500 nm at a sampling interval of 5 nm, certified to within +/- 5% of absolute radiance.

Wavelength calibration is provided by an Oriel Cornerstone 130 1/8m monochromator. This automated, computer-controlled instrument provides calibrated and repeatable wavelength outputs of 1 nm channels in the VNIR and 3 nm channels in the SWIR range. The central wavelength locations of these outputs are known and certified accurate within 0.5 nm.