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

Abstract

Pacific Northwest National Laboratory (PNNL) is presently compiling a quantitative, high spectral resolution (0.10 cm/sup -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/spl deg/C, with most species also having reference data for 5/spl deg/C and 50/spl deg/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 N/sub 2/ so as to emulate atmospheric pressure broadening. Details of the data acquisition protocol and spectral analysis are discussed.