Smithsonian stratospheric far-infrared spectrometer and data reduction system

Details Smithsonian stratospheric far-infrared spectrometer and data reduction system Smithsonian stratospheric far-infrared spectrometer and data reduction system

Feb 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995jgr...100.3091j&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 100, no. D2, p. 3091-3106

Physics

63

Airborne Equipment, Balloon-Borne Instruments, Error Analysis, Fourier Transformation, Infrared Spectrometers, Sensitivity, Stratosphere, Atmospheric Pressure, Atmospheric Temperature, Calibrating, Mixing Ratios, Oxygen, Phase Deviation, Vertical Distribution

Scientific paper

The Smithsonian far-infrared spectrometer (FIRS) is a remote sensing Fourier transform spectrometer that measures the mid- and far-infrared thermal emission spectrum of the stratosphere from balloon and aircraft platforms. The spectrometer has had nine successful balloon flights from 1987 to 1994, flying at float altitudes of 36 - 39 km and collecting 131 hours of midlatitude stratospheric limb spectra. The spectrometer also flew on a NASA CD-8 aircraft, as part of the second Airborne Arctic Stratospheric Expedition (AASE-2), collecting 140 hours of overhead spectra at latitudes ranging from the equator to the north pole. We present here a brief description of the instrument, a discussion of data reduction procedures, an estimation of both random and systematic errors, an outline of the procedure for retrieving mixing ratio profiles, and an explanation of the method of deriving temperature and pressure from the far- and mid-infrared spectra.

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