Selection of the sounding channels for the High-Resolution Dynamics Limb Sounder (HIRDLS)

David P. Edwards; John C. Gille; Paul L. Bailey; John J. Barnett

doi:10.1117/12.187572

30 September 1994 Selection of the sounding channels for the High-Resolution Dynamics Limb Sounder (HIRDLS)

David P. Edwards, John C. Gille, Paul L. Bailey, John J. Barnett

Proceedings Volume 2266, Optical Spectroscopic Techniques and Instrumentation for Atmospheric and Space Research; (1994) https://doi.org/10.1117/12.187572
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

Abstract

In this paper we describe the scientific design work behind the selection of the IR spectral passbands for the 21 sounding channels of the high resolution dynamics limb sounder (HIRDLS) which is scheduled to fly aboard the Earth Observing System (EOS) chemistry platform at the beginning of the next century. At least one radiometer channel must be used for each gas that is being measured. Preferably the interfering contributions to the radiance by other gases in a channel should be small, but the principle requirements are that the desired emission be measured with high signal-to-noise ratio, and that there be separate channels for the measurement of interfering species. However, more than one channel is required to provide full altitude coverage of those target gases such as CO₂, H₂O, and O₃, which have emission bands whose centers become optically thick in the middle atmosphere. Further channels, in which gaseous absorption is low, are required for the characterization of aerosol effects. We describe the HIRDLS channels selected for each gas, with emphasis on signal-to-noise considerations and altitude coverage, the elimination of contaminating signal between channels, and non-LTE processes for high altitude sounding and space view definition.

Citation Download Citation

David P. Edwards, John C. Gille, Paul L. Bailey, and John J. Barnett "Selection of the sounding channels for the High-Resolution Dynamics Limb Sounder (HIRDLS)", Proc. SPIE 2266, Optical Spectroscopic Techniques and Instrumentation for Atmospheric and Space Research, (30 September 1994); https://doi.org/10.1117/12.187572

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