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- W2076520558 abstract "A great variety of atmospheric phenomena on the Earth can be observed in the 300 to 4000 A region. These include simple absorption; Rayleigh scattering; resonance fluorescence from atoms, molecules, and ions; electron impact excitation; recombination radiation; chemiluminescence; and emissions from precipitating ions and neutrals. Observations at these wavelengths from space have been carried out primarily with grating spectrometers and scanning filter photometers. A difficulty with instruments of this type is that they view only a small part of the Earth at any one time and as a result it is difficult to separate temporal and spatial observations. A description of the Earth as it might appear if viewed from a distant spacecraft with imaging capability is extrapolated from available localized data for several optical phenomena. Discussed are variations in reflected sunlight due to ozone absorption, resonant-scattering by geocoronal atoms, resonant-scattering by ions in the plasmasphere, excitation of ultraviolet emissions by electrons in the dayglow and aurora, and the tropical ultraviolet arcs caused by O+ recombination. Particular emphasis is placed on the expected temporal and spatial variability. It is concluded that significant new information could be gathered by ultraviolet-sensitive television systems placed in high Earth orbit, either synchronous or polar." @default.
- W2076520558 created "2016-06-24" @default.
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- W2076520558 date "1981-01-01" @default.
- W2076520558 modified "2023-09-27" @default.
- W2076520558 title "Earth as viewed in the ultraviolet" @default.
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- W2076520558 doi "https://doi.org/10.1016/0273-1177(81)90226-x" @default.
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