Results 181 to 190 of about 3,254 (234)
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Calibrations of the Airglow Photometers and Spectrometers
Applied Optics, 1973When observations of the same source are made by several instruments, the sources of apparent discrepancies in the results of these measurements are likely to be (1) differences in the operational definitions of the terms involved in the calibration procedure and (2) various sources of errors in the execution of the step wise procedure of calibrating ...
B S, Dandekar, D J, Davis
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Proceedings of the IRE, 1959
A phenomenological description of the night airglow is presented, reviewing the historical background, and what is known about height, temporal and spatial variations in intensity, and movements. The very important relationship to aurora and evidence for latitude-seasonal effects are examined.
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A phenomenological description of the night airglow is presented, reviewing the historical background, and what is known about height, temporal and spatial variations in intensity, and movements. The very important relationship to aurora and evidence for latitude-seasonal effects are examined.
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Excitation of the Venus Night Airglow
Science, 1977The strongest spectral features in the Venus night airglow between 3000 and 8000 angstroms are identified as the Herzberg II (c 1 σ - u - X 3 σ - g ) bands of molecular oxygen.
G M, Lawrence, C A, Barth, V, Argabright
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Planetary and Space Science, 1959
Abstract Low dispersion, high speed spectra of the unilluminated portion of Venus show emission features at 4415 A and 4435 A which agree in position with those found by Kozyrev. Kozyrev's other emission bands are not corroborated by these spectra. A previously unreported emission band may be present at 4505 A.
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Abstract Low dispersion, high speed spectra of the unilluminated portion of Venus show emission features at 4415 A and 4435 A which agree in position with those found by Kozyrev. Kozyrev's other emission bands are not corroborated by these spectra. A previously unreported emission band may be present at 4505 A.
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Journal of Scientific Instruments, 1960
A simple, direct-reading and sensitive photometer which is easily transported and is independent of external power supplies is described. Details of the optical system and the electronic circuitry are given, and the performance of the apparatus is discussed.
B J O'Brien, G de la Harpe
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A simple, direct-reading and sensitive photometer which is easily transported and is independent of external power supplies is described. Details of the optical system and the electronic circuitry are given, and the performance of the apparatus is discussed.
B J O'Brien, G de la Harpe
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On the calibration of airglow photometers
Planetary and Space Science, 1966Abstract In a recent paper, Kulkarni and Sanders (1) discuss the laboratory calibration of a radio-activated phosphor suitable for use as a calibrating light source in nightglow photometers. In this paper, we consider various sources of error involved in the use of such a calibration source; in particular, the variation of its radiance with time ...
H.Virginia Blacker, M. Gadsden
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Journal of Photochemistry, 1984
Abstract This survey of excitation processes for singlet O 2 in planetary atmospheres is intended to provide an introduction to the following papers in which laboratory investigations and field measurements are discussed in more detail. The three singlet states, a 1 Δ g , b 1 Σ g + and c 1 Σ u − , contribute to features in the airglows of ...
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Abstract This survey of excitation processes for singlet O 2 in planetary atmospheres is intended to provide an introduction to the following papers in which laboratory investigations and field measurements are discussed in more detail. The three singlet states, a 1 Δ g , b 1 Σ g + and c 1 Σ u − , contribute to features in the airglows of ...
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Nitrogen oxides and the airglow
Journal of Atmospheric and Terrestrial Physics, 1955Abstract The chemospheric processes lead to various possibilities for description of the contribution of nitrogen oxides in the airglow. An excitation of the Vegard-Kaplan system is indicated when nitric oxide is formed by a three-body collision process involving molecular nitrogen.
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2005
The ionospheric glow is due to the desexcitation of neutral or ion molecules and atoms. Its computation requires the knowledge of a number of parameters including the production of the excited species. Several processes occur: resonant and fluorescent scattering, chemical reactions, recombination, photo-absorption or collisions.
Lilensten, Jean +5 more
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The ionospheric glow is due to the desexcitation of neutral or ion molecules and atoms. Its computation requires the knowledge of a number of parameters including the production of the excited species. Several processes occur: resonant and fluorescent scattering, chemical reactions, recombination, photo-absorption or collisions.
Lilensten, Jean +5 more
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