ANGEO Annales Geophysicae ANGEO Ann. Geophys. 1432-0576 Copernicus Publications Göttingen, Germany 10.5194/angeo-29-2169-2011 Dusty space plasma diagnosis using temporal behavior of polar mesospheric summer echoes during active modification Mahmoudian A. 1 Scales W. A. 1 Kosch M. J. 2 Senior A. 2 Rietveld M. 3 The Bradley Department of Electrical and Computer Engineering, Virginia Tech, USA Physics dept., Lancaster University, Lancaster LA1 4YB, UK EISCAT Scientific Association, Ramfjordmoen, 9027 Ramfjordbotn, Norway 29 11 2011 29 11 2169 2179 Copyright: © 2011 A. Mahmoudian et al. 2011 This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/3.0/ This article is available from https://angeo.copernicus.org/articles/29/2169/2011/angeo-29-2169-2011.html The full text article is available as a PDF file from https://angeo.copernicus.org/articles/29/2169/2011/angeo-29-2169-2011.pdf

The objective of this paper is to study the effect of different plasma and dust parameters on Polar Mesospheric Summer Echoes (PMSE) temporal behavior after turn-on and turn-off of radio wave heating and to use these responses to diagnose the properties of the dust layer. The threshold radar frequency and dust parameters for the enhancement or suppression of radar echoes after radio wave heating turn-on are investigated for measured mesospheric plasma parameters. The effect of parameters such as the electron temperature enhancement during heating, dust density, dust charge polarity, ion-neutral collision frequency, electron density and dust radius on the temporal evolution of electron irregularities associated with PMSE are investigated. The possible diagnostic information for various charged dust and background plasma quantities using the temporal behavior of backscattered radar power in active experiments is discussed. The computational results are used to make predictions for PMSE active modification experiments at 7.9, 56, 139, 224 and 930 MHz corresponding to existing radar facilities. Data from a 2009 VHF (224 MHz) experiment at EISCAT is compared with the computational model to obtain dust parameters in the PMSE.

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