Author: I. L. Kofsky Publisher: ISBN: Category : Languages : en Pages : 169
Book Description
The data base on column intensity and spatial-temporal irregularity structure of 2 1/2 - 7 micrometers infrared auroral airglow radiations is reviewed, and models of occurrence of sky background clutter in sensor fields are specified. Probabilities and geographic location of auroral particle fluxes, energy conversion efficiencies and relaxation times after excitation, chemiluminescence and fluorescence spectrums of the important radiating species N0, C02, N2 and N0+ (at approx
Author: Joseph W. Chamberlain Publisher: Elsevier ISBN: 1483222535 Category : Science Languages : en Pages : 723
Book Description
International Geophysics Series, Volume 2: Physics of the Aurora and Airglow explores certain physical aspects of aurora and airglow. This volume is composed of 13 chapters and begins with surveys of the theory and spectroscopic and photometric analyses of radiation from the upper atmosphere. The subsequent chapters treat the geographic distribution of aurora and its physical processes in the atmosphere. Other chapters examine the theory of hydrogen emission in aurora, resonance scattering by atmospheric sodium, the excitation of the oxygen red lines in the airglow, and an atlas of the auroral spectrum. A chapter focuses on the analysis of twilight observations for emission heights. The concluding chapters discuss the theory of day airglow, as well as the spectral photometry and excitation of the nightglow. This book is of value to geophysicists, theoreticians, and scientists of the allied fields of geophysics.
Author: E. Ray Huppi Publisher: ISBN: Category : Auroras Languages : en Pages : 96
Book Description
Infrared auroral backgrounds in the 3 micron region were measured with a filtered radiometer from a KC-135 aircraft. The measurements of temporal and spatial variations in the infrared were compared with simultaneous measurements of 3914A and 5577A visible radiation. Auroral measurements were obtained during dark and sunlit conditions. Frequency analysis shows the 3 micron and 5577A to be delayed and filtered relative to the prompt 3914A N2(+) emission. The ratio of 3 micron to 3914A emission varies by about a factor of 3 and appears to be a function of peak electron deposition altitude.
Author: J. R. Winick Publisher: ISBN: Category : Atmospheric physics Languages : en Pages : 244
Book Description
A first principles scientific model for predicting the spectral radiance from the auroral thermosphere seen by an earthlimb observer is described. This model, and the resulting Auroral Atmospheric Radiance Code (AARC), describe the energy deposition in the thermosphere by primary auroral electrons and the ensuing effects. The latter include electron production and production of nonequilibrium concentrations of vibrationally and electronically excited states, by photochemical means, and by energy transfer. Relaxation of the states by collisions and radiation is described, and the transmission of the infrared radiation emitted from these states is treated. Currently, the model considers four radiators: the nitric oxide vibrational fundamental and first overtone at 2.8 and 5.3 micro the NO+ fundamental at 4.3 mirco, and the CO2 asymmetric- stretch (NU -3 mode) emission at 4.3 micro. The prompt optically optically thin emitters (NO and NO+) are treated in terms of stored, precalculated tables of efficiencies (photons per ion-pair).
Author: Ernest Ray Huppi Publisher: ISBN: Category : Airglow Languages : en Pages : 36
Book Description
Two systems designed to enable the spectral measurement of the airglow in the 2 to 4 micron region have been developed. Both systems are designed for use in high-altitude aircraft. This eliminates the problem of strong thermal emission of the lower atmosphere which is encountered when making airglow measurements in the 2 to 4 micron region from the ground. In the first system the entire measurement apparatus, including the interferometer-spectrometer, is cooled in order to eliminate unwanted thermal emission. The second system incorporates the use of a cold chopper mounted outside the aircraft. This technique allows the interferometer-spectrometer to be maintained at normal temperatures.
Author: I. L. Kofsky
Author: Joseph W. Chamberlain
Author: E. Ray Huppi
Author: J. R. Winick
Author: Joseph Wyan Chamberlain
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Author: Akademii︠a︡ nauk SSSR. Mezhduvedomstvennyĭ geofizicheskiĭ komitet. IV razdel programmy MGG.
Author: Billy Murray McCormac
Author: Ernest Ray Huppi