Articles | Volume 14, issue 12
Ann. Geophys., 14, 1487–1495, 1996

Special issue: VIIIe EISCAT

Ann. Geophys., 14, 1487–1495, 1996

  31 Dec 1996

31 Dec 1996

First experiences of full-profile analysis with GUISDAP

M. S. Lehtinen1, A. Huuskonen2, and J. Pirttilä3 M. S. Lehtinen et al.
  • 1Geophysical Observatory, Sodankylä, FIN-99600, Sodankylä , Finland
  • 2Finnish Meterological Institute, Geophysical Research, P.O. Box 503, FIN-00101, Helsinki, Finland
  • 3University of Oulu, Department of Physical Sciences, FIN-90570, Oulu, Finland

Abstract. In this paper we summarize the theory behind full-profile analysis of IS measurements and report first practical experiences with the GUISDAP (Grand Unified Incoherent Scatter Design and Analysis Package) system designed to perform full-profile analysis of any IS measurements efficiently. By fitting whole plasma parameter profiles over the ionosphere, instead of point values of the parameters supposed to be approximately constant over small range intervals, full-profile analysis is free of underlying assumptions about the slow variation of the plasma parameters as a function of range. We define full-profile analysis as a mathematical inversion problem formalism and explain how it differs from the traditional gated analysis. Moreover, we study the bias introduced to traditional analysis results using realistic model ionospheres. By applying the full-profile method to data generated from the model ionospheres, we demonstrate that full-profile analysis is free from this kind of bias. Lastly, an example of analysis of real data by full-profile and gated analyses is shown.

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