Remote sensing of atomic oxygen - Some observational difficulties in the use of the forbidden O I 1173-A and O I 1641-A transitions

Details Remote sensing of atomic oxygen - Some observational difficulties in the use of the forbidden O I 1173-A and O I 1641-A transitions Remote sensing of atomic oxygen - Some observational difficulties in the use of the forbidden O I 1173-A and O I 1641-A transitions

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....92...10e&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 92, Sept. 1, 1987, p. 10, 140-10, 144.

Computer Science

Sound

5

Electron Impact, Emission Spectra, Forbidden Transitions, Oxygen Atoms, Remote Sensing, Ultraviolet Radiation, High Resolution, Planetary Atmospheres, Sounding Rockets, Spectral Resolution, Stellar Atmospheres, Upper Atmosphere

Scientific paper

Recent sounding rocket and satellite studies suggest that simultaneous measurements of the O I 989-A and 1304-A resonance lines and of the forbidden 1172.6-A and 1641.3-A transitions would form the basis of a useful remote sensing technique for measuring the O I density and optical opacity of a planetary or stellar atmosphere. Because the 1172.6-A and 1641.3-A emissions are weak lines and are emitted in a wavelength region rich in spectral features, it is important to determine whether typical flight instruments can make measurements with sufficient spectral purity so that the remote sensing observations will yield accurate results. A detailed, high-resolution study of the far UV emission features in the regions surrounding the atomic oxygen transitions at 1172.6 and 1641.3 A was made. These spectra, which were excited by electron impact on O2 and N2, are presented in an attempt to display some potential sources of interference in aeronomical measurements of these O I lines. Both atomic and molecular emissions are found, and the spectral resolution necessary to make unambiguous measurements is discussed.

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