Extension of atomic nitrogen measurements into the lower thermosphere

Details Extension of atomic nitrogen measurements into the lower thermosphere Extension of atomic nitrogen measurements into the lower thermosphere

Aug 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.3291e&link_type=abstract

Journal of Geophysical Research, vol. 82, Aug. 1, 1977, p. 3291-3294.

Physics

Atom Concentration, Midlatitude Atmosphere, Nitrogen Atoms, Satellite Observation, Thermosphere, Explorer 51 Satellite, Mass Spectroscopy, Nitric Oxide, Satellite-Borne Instruments, Vertical Distribution

Scientific paper

Special operating modes of the open source neutral mass spectrometer (OSS) on the Atmosphere Explorer C permit the measurement of odd nitrogen (N + NO) number densities between 180 and 450 km. By using optical measurements of NO concentrations from the ultraviolet nitric oxide experiment on AE-C, number densities of N are obtained. Altitude profiles for the midlatitude legs of three orbits in the late spring of 1974 are presented and compared with densities predicted by the AE-C (OSS) empirical N model at 375 km. Atomic nitrogen appeared to be in diffusive equilibrium at least above 200 km in each of the orbits studied. A typical number density of N at 200 km, 0900 LST, and 40 deg N latitude in late May 1974 is 30 million per cu cm.

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