Accession Number : AD0451530


Title :   HF COMMUNICATION EFFECTS SIMULATION: THE IONOSPHERE ABOVE 100 KM, A SIMPLE MODEL.


Descriptive Note : Interim technical rept. 6,


Corporate Author : STANFORD RESEARCH INST MENLO PARK CA


Personal Author(s) : Whitten, R C ; Black, G ; Edmonds, R S ; Lorents, D C


Report Date : Aug 1964


Pagination or Media Count : 107


Abstract : A model of the quiet ionosphere in the altitude range 100 to 500 km for various conditions of solar activity is constructed. In order to carry out this program, a model atmosphere, i.e., profiles of temperature density, pressure, number density of the various constituents, and scale height, based on rocket and satellite measurements and on models developed by other investigators, is also developed. From the model atmosphere and from measurements of the intensities of solar ionizing radiations, ionization rate profiles are computed. Electron loss and diffusion processes and their associated rate constants are also treated, and the results are substituted into appropriately simplified forms of the continuity equation; the solutions yield the ionospheric model. E- and F-region irregularities are also discussed, and a model of electron collision frequencies in the altitude range 100 to 500 km is presented. (Author)


Descriptors :   *COMMUNICATION AND RADIO SYSTEMS , *ATMOSPHERE MODELS , HIGH FREQUENCY , IONOSPHERE , RECOMBINATION REACTIONS , UPPER ATMOSPHERE , DIURNAL VARIATIONS , WIND , IONIZATION , ATMOSPHERIC MOTION , ATMOSPHERIC TIDES , IONOSPHERIC DISTURBANCES , IONOSPHERIC PROPAGATION , ULTRAVIOLET RADIATION , DIFFUSION , TURBULENCE , SOLAR RADIATION , PHOTOELECTRIC EFFECT , GAS IONIZATION


Distribution Statement : APPROVED FOR PUBLIC RELEASE