Theory, Applications, and Results of the Long-Line Correlation Spectrometer

This paper considers the techniques of correlation spectroscopy as applied to the remote sensing of air-polluting gases SO2 and NO2. The occurrence of molecular absorption of solar and artificial electromagnetic radiation is used to determine the quantitative value of the gases over a long-line length. The paper will consider the instrument principles of operation, applications of a portable remote sensing system, and results for the long-line determinations of S02 and NO2 quantities. The system and application techniques presented here are in consideration of inimizing distorting and interfering factors that are inherently present in solar radiation. The remote sensing long-line system that is portable is significant to air-pollution monitoring, because it adds accurate quantitative dimension to the usual point sampling methods of measurement.