The PNNL quantitative IR database for infrared remote sensing and hyperspectral imaging

Pacific Northwest National Laboratory (PNNL) is presently compiling a quantitative, high spectral resolution (0.10 cm^-1) set of infrared reference data that are specifically designed for atmospheric monitoring, remote sensing, and hyperspectral imaging. The final list of target compounds will contain nearly 500 gas-phase species, whereby each species is reported as a composite reference spectrum at 25°C, with most species also having reference data for 5°C and 50°C. Each composite spectrum is a quantitative Beer´s law fit to typically 10 or more individual infrared measurements, whereby each individual spectrum corresponds to a different partial pressure of the sample that has been pressurized to 760 torr with N₂ so as to emulate atmospheric pressure broadening. Details of the data acquisition protocol and spectral analysis are discussed.