Showing papers by "Charles Swenson published in 2003"
06 Jan 2003
12 citations
01 Jan 2003
TL;DR: In this paper, an improved control theory model of the instrument is derived and analyzed for a variety of ionospheric conditions, and the results are compared with theoretical results in terms of calibration measurements.
Abstract: AbstmctThe fundaJDental parameter for the Earth's ionosphere, a space plasma, is its density. This density can be determined in-situ from its resonant frequency properties, which can be stimulated by an antenna operating at RF frequencies immersed in the plasDla. The resonant conditions are observed through the antenna's impedance characteristics. Innovations in the Utah State University plasma impedance probe, an instruDlent used for making these Dleasurements are discussed. An improved control theory model of the instrument is derived and analyzed for a variety of ionospheric conditions. Calibration measurements are compared with theoretical results.
11 citations