Proceedings PaperAccurate Frequency And Intensity Measurements Of The Infrared Spectra Of Atmospheric Molecules
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To realize the full potential of spectroscopic measurement techniques for atmospheric measurements, accurate frequency calibration is vital to obtaining species specificity, and good intensity data are necessary to quantify the number of molecules being observed. This paper will discuss the various problems and solutions found in infrared laboratory measure-ments on atmospheric molecules. The advantages and limitations of different measurement techniques and equipment will be discussed. Calibration techniques and measurement accuracy and precision will be emphasized. Frequency calibration aids will be presented including current and planned tables of absorption frequency standards being developed by the Bureau of Standards for the calibration of high resolution devices with an accuracy of ± 3 MHz. Intensity measurements are very susceptible to systematic errors and great care most be exercised in order to obtain accuracies better than ±;10%. It is even more difficult to know what is the accuracy of a given measurement. Recent efforts at providing accurate intensity data will be described.