first eiscat measurement of electron-gas temperature in the artificially heated d-region ionosphere

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2000
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Abstract
The ionospheric electron gas can be heated artificially by a powerful radio wave. According to our modeling, the maximum effect of this heating occurs in the D-region where the electron temperature can increase by a factor of ten. Ionospheric plasma parameters such as Ne, Te and Ti are measured by EISCAT incoherent scatter radar on a routine basis. However, in the D-region the incoherent scatter echo is very weak because of the low electron density. Moreover, the incoherent scatter spectrum from the D-region is of Lorentzian shape which gives less information than the spectrum from the E- and F-regions. These make EISCAT measurements in the D-region difficult. A combined EISCAT VHF-radar and heating experiment was carried out in November 1998 with the aim to measure the electron temperature increase due to heating. In the experiment the heater was switched on/off at 5 minute intervals and the integration time of the radar was chosen synchronously with the heating cycle. A systematic difference in the measured autocorrelation functions was found between heated and unheated periods.

Key words: Ionosphere (active experiments; plasma temperature and density; wave propagation)
Reference Key
kero2000annalesfirst Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors A. Kero, T. Bösinger, P. Pollari, E. Turunen, M. Rietveld
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Journal journal of food measurement and characterization
Year 2000
DOI
10.1007/s00585-000-1210-8
URL
https://www.ann-geophys.net/18/1210/2000/angeo-18-1210-2000.pdf
Keywords
cosmic physics sciencephysicsgeophysics

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