23 May 1997 Long-path open-path Fourier transform infrared monitoring of atmospheric gases: compendium method TO-16
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The anticipated use of the FTIR remote sensing technique by personnel trained only at the technician level has prompted the US Environmental Protection Agency (USEPA) to pursue the production of a standardized procedure for instrument use. This procedure is to become one of a compendium of methods maintained by the USEPA. The compendium is a collection of methods for the measurement of toxic organic compounds and is commonly referred to as the to compendium. The procedure for the FTIR is number 16 and therefore is most often referenced as TO-16. The procedure begins by assuming that the operator is more or less familiar with the daily operation of the FTIR and has taken advantage of whatever training is available from the instrument manufacturer. The procedure further assumes that the quality assurance project plan for any one monitoring program has been followed and that the operator has in his possession a set of interferograms or single beam spectra from which concentration data is to be gleaned. There are two primary chapters in the document that describe how the spectra are to be processed in order to produce the concentration of various atmospheric gases. Chapter 8 presents the individual steps that all the spectra must be subjected to during the data reduction procedure. This chapter includes items for producing valid data such as correcting the spectra for line shifts and subtracting stray infrared energy. Chapter 9 describes the minimum requirements that are deemed necessary for quality assurance and quality control purposes.
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George M. Russwurm, George M. Russwurm, } "Long-path open-path Fourier transform infrared monitoring of atmospheric gases: compendium method TO-16", Proc. SPIE 3107, Remote Sensing of Vegetation and Water, and Standardization of Remote Sensing Methods, (23 May 1997); doi: 10.1117/12.274752; https://doi.org/10.1117/12.274752

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