Determination of atomic oxygen density and temperature of the thermosphere by remote sensing

Physics

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Atmospheric Density, Atmospheric Temperature, Oxygen Atoms, Remote Sensing, Thermosphere, Eigenvalues, Jacobi Matrix Method, Magnetic Dipoles

Scientific paper

Measurement of emission from the earth's atmosphere in the far infrared due to transitions between fine structure levels of the ground state (3P) of atomic oxygen at 63 microns, (3P1 to 3P2) and 147 microns (3P0 to 3P1) is proposed. These magnetic-dipole allowed transitions with long radiative lifetimes (about 3.2 h for the 63 micron transition and about 16.3 h for the 147 micron transition) are assumed to be in equilibrium with the local translational temperature. A one-dimensional onion-peel inversion of the limb emissions at 63 and 147 microns from a model atmosphere is shown to yield reasonable results for both the temperature and atomic oxygen density in the 90-250 km altitude range.

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