| タイトル | Balloon-borne cryogenic spectrometer for measurement of lower stratospheric trace constituents |
| 著者（英） | Brasunas, J. C.; Herath, L. W.; Kunde, V. G.; Hanel, R. A.; Walser, D. |
| 著者所属（英） | Science Systems and Applications, Inc.|NASA Goddard Space Flight Center |
| 発行日 | 1986-01-01 |
| 言語 | eng |
| 内容記述 | A liquid-nitrogen cooled, multidetector Fourier transform spectrometer has been constructed to measure minor stratospheric constituents via high resolution, earth-limb emission spectroscopy from a balloon-borne platform. Cryogenic cooling, combined with the use of extrinsic silicon photoconductor detectors cooled to liquid-helium temperature, allows the detection of weak emission features of gaseous species. The spectrometer has two basic scan modes: the first mode records the continuous spectrum from 650-2100/cm with 0.2/cm resolution; the second simultaneously records four preselected narrow intervals (about 175/cm bandpass each) with 0.02/cm resolution, unapodized. Filtering of the interferogram signal is done by real-time, digital signal processing. The most important feature of this flat mirror Michelson system, with respect to remote balloon-borne operation, is the dynamic alignment system which maintains the relative parallelism of the two flat reflectors of the interferometer. Species identified to date in data obtained during a Nov. 6, 1984, flight include: CO2, O3, H2O, CH4, HNO3, N2O, NO2, NO, CCl3F (Freon-11) and CF2Cl2 (Freon-12). |
| NASA分類 | INSTRUMENTATION AND PHOTOGRAPHY |
| レポートNO | 87A26662 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/379564 |
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