${session.getAttribute("locale")} 5 A comparison of diurnal and seasonal variations in polar cap ionospheric velocity determined from a digital ionosonde model and the IZMEM electric potential model Wed 09 Dec 2015 23:28:21 EST ]]> Co-located DPS-4 and CADI ionosonde measurements of E- and F-region ionospheric drift at a southern polar cap station Wed 09 Dec 2015 19:25:35 EST ]]> Polar cap digital ionosonde observations of E-region Bragg scatter during intense lacuna conditions Thu 10 Dec 2015 00:47:41 EST ]]>