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- W331133376 abstract "The possible use of satellite ultraviolet measurements to deduce the ionospheric electron-density profile (EDP) on a global basis is discussed. During 1984 comparisons were continued between the hybrid daytime ionospheric model and the experimental observations. These comparison studies indicate that: (1) the essential features of the EDP and certain UV emissions can be modelled, (2) the models are sufficiently sensitive to input parameters to yield poor agreement with observations when typical input values are used, (3) reasonable adjustments of the parameters can produce excellent agreement between theory and data for either EDP or airglow but not both; and (4) the qualitative understanding of the relationship between two input parameters (solar flux and neutral densities) and the model EDP and airglow features were verified. The development of a hybrid dynamic model for the nighttime midlatitude ionosphere was initiated. This model is similar to the daytime hybrid model, but uses the sunset EDP as an initial value and calculates the EDP as a function of time through the night. In addition, a semi-empirical model was developed, based on the assumption that the nighttime EDP is always well described by a modified Chapman function. This model has great simplicity and allows the EDP more » to be inferred in a straightforward manner from optical observations. Comparisons with data are difficult, however, because of the low intensity of the nightglow. « less" @default.
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- W331133376 date "1985-04-26" @default.
- W331133376 modified "2023-09-27" @default.
- W331133376 title "Determination of ionospheric electron-density profiles from satellite uv (ultraviolet) emission measurements, Fiscal Year 1984. Environmental research papers, February 1984-February 1985" @default.
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