14 December 1992 Remote sensing of stratospheric oh from high altitude aircraft
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Proceedings Volume 1929, 17th International Conference on Infrared and Millimeter Waves; 19294M (1992) https://doi.org/10.1117/12.2298283
Event: 17th International Conference on Infrared and Millimeter Waves, 1992, Pasadena, CA, United States
Abstract
The hydoxyl radical OH plays an important role in the stratospheric chemistry: it is involved in the HOE, NOz and C10, cycles. Measurements of the concentration profiles of OH together with its sources and sinks with high temporal and spatial coverage are required for a better understanding of the stratospheric chemistry. The Far Infrared (FIR) is the only spectral region suitable for a remote detection of OH. Sofar concentration profiles could only be determined using stratospheric balloons. A feasibility study has shown that a FIR heterodyne spectrometer aboard a standard aircraft (height 12 km) can be utilized for remote sensing of stratospheric OH and other important molecules [1]. The heterodyne technique [2] is very promising, especially since airborne FIR heterodyne technology is existing [3]. With a stratospheric aircraft reaching altitudes above 20 km this technique will substantially improve the quality of concentration profiles compared to measurements with standard aircraft. The improvement of high altitude remote OH measurements compared to standard altitude (12 km) detection is mainly due to (i) the strong decrease in water background signal, (ii) the higher signal because of the different observation geometry, and (iii) the possibility to utilize limb sounding techniques for stratospheric levels below observation altitude.
© (1992) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. Birk, M. Birk, } "Remote sensing of stratospheric oh from high altitude aircraft", Proc. SPIE 1929, 17th International Conference on Infrared and Millimeter Waves, 19294M (14 December 1992); doi: 10.1117/12.2298283; https://doi.org/10.1117/12.2298283
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