Spectral data measurement and correction

Abstract From the Canadian patent

For correcting measured spectral data of n samples for data due to the measurement process itself, e.g. due to spectral baseline variations and/or water vapor and carbon dioxide present in the atmosphere of the spectrometer used to make the spectral measurements, the spectral data being quantified at f discrete frequencies to produce a matrix X (of dimension f by n) of calibration data; matrix X is orthogonalized with respect to a correction matrix U m of dimension f by m comprising m quantified correction spectra, at the discrete frequencies f which simulate data arising , from the measurement process itself. The correction method is preferably included in a method of estimating …