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The MIPAS balloon borne trace constitutent experimentA novel cryogenic Fourier transform spectrometer (FTS) has been developed for limb emission measurements in the mid IR-region from balloon-borne platforms. The FTS is a rapid scanning interferometer using a modified Michelson arrangement which allows a spectral resolution of 0.04 cm(exp -1) to be achieved. Solid carbon-dioxide cooling of the spectrometer and liquid-helium cooling of the detectors provide adequate sensitivity. The line of sight can be stabilized in terms of azimuth and elevation. A three-mirror off-axis telescope provides good vertical resolution and straylight rejection. Calibration is performed by high elevation and internal blackbody measurements. Four balloon flights were performed, two of them during spring turn-around 1989 and 1990 over mid-latitudes (Aire sur L'Adour, France, 44 deg N) and two near the northern polar circle in winter 1992 (Esrange, Sweden, 68 deg N). Limb emission spectra were collected from 32 km to 39 km floating altitudes covering tangent heights between the lower troposphere and the floating altitude. The trace gases CO2, H2O, O3, CH4, N2O, HNO3, N2O5, ClONO2, CF2Cl2, CFCl3, CHF2Cl, CCl4, and C2H6 have been identified in the measured spectra. The 1989 data have been analyzed to retrieve profiles of O3, HNO3, CFCl3 and CF2Cl2. The flights over Kiruna have provided the first ever reported profile measurements of the key reservoir species ClONO2 and N2O5 inside the polar vortex.
Document ID
19950004691
Document Type
Conference Paper
Authors
Oelhaf, H. (Kernforschungszentrum G.m.b.H. Karlsruhe, Germany)
Vonclarmann, TH. (Kernforschungszentrum G.m.b.H. Karlsruhe, Germany)
Fischer, H. (Kernforschungszentrum G.m.b.H. Karlsruhe, Germany)
Friedl-Vallon, F. (Kernforschungszentrum G.m.b.H. Karlsruhe, Germany)
Fritzsche, CHR. (Kernforschungszentrum G.m.b.H. Karlsruhe, Germany)
Piesch, CHR. (Kernforschungszentrum G.m.b.H. Karlsruhe, Germany)
Rabus, D. (Kernforschungszentrum G.m.b.H. Karlsruhe, Germany)
Seefeldner, M. (Kernforschungszentrum G.m.b.H. Karlsruhe, Germany)
Voelker, W. (Kernforschungszentrum G.m.b.H. Karlsruhe, Germany)
Date Acquired
September 6, 2013
Publication Date
April 1, 1994
Publication Information
Publication: NASA. Goddard Space Flight Center, Ozone in the Troposphere and Stratosphere, Part 2
Subject Category
ENVIRONMENT POLLUTION
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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