Abstract
Abstract : Faraday rotation data from Satellite S-66 were accumulated at the Electronics Laboratory of the Military Research and Development Center, Bangkok, Thailand from November 1964 through June 1967, a period of intermediate sunspot number (sunspot minimum condition at 1964/1965 and sunspot maximum condition at 1968/1969). These data provide a means of improving ionospheric frequency predictions for regions in Thailand remote from Bangkok (i.e., where no ionosonde data are available). In this report, two methods of analysis-- involving rotation rate and total number of rotations--are applied to the Bangkok observations. The rotation-rate method is used to determine the electron content when the angle between the ray path and geomagnetic field is 90 degrees (transverse position). The total-rotations method is used to determine latitudinal variations of electron content of the equatorial ionosphere for the selected passes from a joint analysis of observations at three stations in Thailand--Songkhla, Bangkok, and Chiengmai. (Author)
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