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On the Construction and Use of a Simple Ionospheric Model
Author(s) -
Nisbet J. S.
Publication year - 1971
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs006i004p00437
Subject(s) - ionosphere , blanketing , sporadic e propagation , middle latitudes , electron density , longitude , latitude , atmospheric sciences , electron , ionosonde , altitude (triangle) , computational physics , physics , boundary layer , standard deviation , meteorology , mathematics , geophysics , astrophysics , statistics , geometry , astronomy , mechanics , stars , quantum mechanics
The parameters controlling the development of a simple model of the E and F regions of the ionosphere are discussed. Uses of such models in scientific investigations and engineering applications are given. A computer model is described that will provide estimates of the electron and ion densities in middle latitudes as a function of latitude, longitude, altitude, season, time, and solar activity. Statistical parameters for midlatitude blanketing sporadic E are presented. An analytic expression is used for the CIRA 1965 neutral atmospheric models. The F 1 region is treated using a photoequilibrium model with three ionic constituents and 62 ionizing radiation groups. The F 2 layer uses theoretical models arranged to fit boundary conditions of N m F 2 , H m F 2 and the electron density at 1000 km. Values of N m F 2 are obtained by using the CCIR atlas of ionospheric characteristics. The midlatitude sporadic E layer is treated by presenting three parameters of the layer: the probability of observing sporadic E with a blanketing frequency greater than 0.5 MHz, the average peak electron density when sporadic E is observed, and the standard deviation (assuming log normal distributions for the peak electron density). The restrictions on the model and the availability of data on suitable boundary conditions are discussed. Suggestions for further development of models of the ionosphere are given.