The Utility of NO 5.3 μm Radiation for Remote Sensing of Thermospheric Atomic Oxygen or Temperature

Details The Utility of NO 5.3 μm Radiation for Remote Sensing of Thermospheric Atomic Oxygen or Temperature The Utility of NO 5.3 μm Radiation for Remote Sensing of Thermospheric Atomic Oxygen or Temperature

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsa71a..04m&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #SA71A-04

Physics

0310 Airglow And Aurora, 0355 Thermosphere: Composition And Chemistry, 0394 Instruments And Techniques

Scientific paper

A major mechanism for vibrational excitation of NO in the thermosphere is collisional energy transfer from atomic oxygen, NO(ν ''=0) + O -> NO(ν '=1) + O. Emission from NO(ν '=1) produces the bright 5.3 μm band. At altitudes where this process dominates vibrational excitation during daylight or aurora, a relationship exists between atomic oxygen and ground state NO densities and temperature (due to the strong temperature dependence of the rate coefficient for vibrational excitation). Simultaneous measurements of ground state NO density, NO 5.3 μm volume emission rate, and either temperature or atomic oxygen density, would enable determination of the remaining quantity. This could provide a powerful remote sensing technique for temperature or atomic oxygen for altitudes where their determination is presently difficult. We will present a sensitivity analysis of this technique and discuss its limitations and range of applicability.

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