Determination of the translational temperature of the high altitude terrestrial thermosphere from the rotational distribution of the 5.3 μm emission from NO(v=1)

Details Determination of the translational temperature of the high altitude terrestrial thermosphere from the rotational distribution of the 5.3 μm emission from NO(v=1) Determination of the translational temperature of the high altitude terrestrial thermosphere from the rotational distribution of the 5.3 μm emission from NO(v=1)

Oct 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.2407s&link_type=abstract

Geophysical Research Letters, Volume 24, Issue 19, p. 2407-2410

Physics

12

Atmospheric Composition And Structure: Airglow And Aurora, Atmospheric Composition And Structure: Thermosphere-Composition And Chemistry, Atmospheric Composition And Structure: Pressure, Density, And Temperature

Scientific paper

The rotational distribution of vibrationally excited nitric oxide produced by impacts with atomic oxygen is investigated using a quasiclassical trajectory approach. The present study confirms the earlier result that the nascent rotational distribution may be described by a Maxwell-Boltzmann (MB) distribution. It further shows that the temperature describing the nascent distribution is about 25% lower than the translational temperature and equals it after 3 to 5 collisions. Translational temperature as function of altitude is derived from the nighttime rotational distribution of the 5.3 μm emission observed by c_ryogenic i_nfrar_ed r_adi_ance for s_huttle (CIRRIS 1A) and compared with the mass spectrometer incoherent scatter (MSIS) model temperature. Because of the strong 5.3 μm emission this method has larger signal than the N+O radiative recombination currently used to determine the nighttime thermospheric temperatures.

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