Satellite observations of the O I 1304, 1356 and 1641 A dayglow and the abundance of atomic oxygen in the thermosphere

Physics

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Abundance, Dayglow, Oxygen Atoms, Satellite Observation, Thermosphere, Monte Carlo Method, Satellite-Borne Instruments, Transition Probabilities, Ultraviolet Spectrometers

Scientific paper

The far ultraviolet spectrometer experiment on the S3-4 satellite made nadir-viewing observations of the atomic oxygen dayglow during the spring of 1978. Comparison of 27 orbits of O I 1304 A (3P-3S), 1356 A (3P-5S), and 1641 A (1D-3S) intensities shows important orbit-to-orbit variations. For four selected orbits of data, airglow intensities have been computed using the O abundance predicted by the MSIS-83 model atmosphere for the appropriate geophysical conditions. In general, the MSIS-83 empirical model reproduces the airglow rather well. To match the absolute magnitude of the airglow, the computed photoelectron flux was increased by 40 percent.

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