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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.5pt;font-family:"Times New Roman","serif";color:black'>This message is to encourage participation in the upcoming URSI General Assembly planned for 13-20 August in Istanbul, Turkey, and specifically to solicit papers for Special Session HG3 on Active Experiments in the Ionosphere and Magnetosphere. A detailed description of the session follows. More information on the conference can be found at </span><a href="http://www.ursigass2011.org/">http://www.ursigass2011.org/</a>. Thank you.<span style='font-size:10.5pt;font-family:"Times New Roman","serif";color:black'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.5pt;font-family:"Times New Roman","serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.5pt;font-family:"Times New Roman","serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.5pt;font-family:"Times New Roman","serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.5pt;font-family:"Times New Roman","serif";color:black'>HG3 – Active Experiments in the Ionosphere and Magnetosphere I<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.5pt;font-family:"Times New Roman","serif";color:black'>Thursday, August 18, 0800 – 0920; 0940 – 1200 (11 papers)<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.5pt;font-family:"Times New Roman","serif";color:black'>Conveners: Bo Thide </span><span style='font-size:10.5pt;font-family:"Times New Roman","serif";color:blue'>bt@irfu.se<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.5pt;font-family:"Times New Roman","serif";color:black'>Keith Groves </span><span style='font-size:10.5pt;font-family:"Times New Roman","serif";color:blue'>keith.groves@hanscom.af.mil<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.5pt;font-family:"Times New Roman","serif";color:black'>Controlled, active experiments have proven useful both for studies of the natural upper<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.5pt;font-family:"Times New Roman","serif";color:black'>atmosphere and magnetosphere through observations of the ionospheric response to HF induced<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.5pt;font-family:"Times New Roman","serif";color:black'>perturbations, for basic physics investigations exploiting the ionosphere as a large, natural plasma<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.5pt;font-family:"Times New Roman","serif";color:black'>laboratory-without-walls and for understanding fundamental wave propagation and wave-particle<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.5pt;font-family:"Times New Roman","serif";color:black'>interactions in the magnetosphere. This experimental diversity has attracted the attention and<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.5pt;font-family:"Times New Roman","serif";color:black'>participation of physicists from a wide range of disciplines. As a result, research exploiting active<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.5pt;font-family:"Times New Roman","serif";color:black'>experiments continues to be strongly motivated by its many applications in the fields of aeronomy,<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.5pt;font-family:"Times New Roman","serif";color:black'>space physics, plasma physics, and telecommunications science. This session solicits papers<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.5pt;font-family:"Times New Roman","serif";color:black'>addressing the nonlinear nature of HF radio wave-plasma interactions, their dependence on<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.5pt;font-family:"Times New Roman","serif";color:black'>specific radio wave properties, such as frequency, power, polarization and orientation with<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.5pt;font-family:"Times New Roman","serif";color:black'>respect to the geomagnetic field, and the physical processes responsible for their occurrence.<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.5pt;font-family:"Times New Roman","serif";color:black'>Presentations dealing with other active techniques, such as in situ radio frequency transmissions<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Times New Roman","serif";color:black'>and chemical releases, including rocket motor exhaust effects, are also welcome.</span><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Keith M. Groves<o:p></o:p></p><p class=MsoNormal>AFRL/RVBX cell: 1-617-549-7067<o:p></o:p></p><p class=MsoNormal>29 Randolph Road voice: 1-781-377-3137<o:p></o:p></p><p class=MsoNormal>Hanscom AFB, MA 01731 fax: 1-781-377-3550<o:p></o:p></p><p class=MsoNormal>keith.groves@hanscom.af.mil <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>