S.-R. Zhang, J. M. Holt, P. J. Erickson, L. P. Goncharenko, M. J. Nicolls, M. McCready, and J. Kelly. Ionospheric ion temperature climate and upper atmospheric long-term cooling. J. Geophys. Res. Space Physics, American Geophysical Union, issue 121, 2016 . R. Michell and M. Samara. Observability of NEIALs with the Sondrestrom and Poker Flat incoherent scatter radars. J. Atmos. Solar-Terr. Phys., pages 299-307, 2013 . M. C. Kelley, M. J. Nicolls, R. H. Varney, R. L. Collins, R. Doe, J. M. C. Plane, J. Thayer, M. Taylor, B. Thurairajah, and K. Mizutani. Radar, lidar, and optical observations in the polar summer mesosphere shortly after a space shuttle launch. J. Geophys. Res., volume 115, 2010 . L. R. Lyons, Y. Nishimura, Y. Shi, S. Zou, H.-J. Kim, V. Angelopoulos, C. Heinselman, M. J. Nicolls, and K.-H. Fornacon. Substorm triggering by new plasma intrusion: Incoherent-scatter radar observations. J. Geophys. Res., volume 115, 2010 . S.-R. Zhang, J. M. Holt, A. P. van Eyken, C. Heinselman, and M. McCready. IPY observations of ionospheric yearly variations from high- to middle-latitude incoherent scatter radars. J. Geophys. Res., volume 115, 2010 . L. R. Lyons, H.-J. Kim, X. Xing, S. Zou, D.-Y. Lee, C. Heinselman, M. J. Nicolls, V. Angelopoulos, D. Larson, J. McFadden, A. Runov, and K.-H. Fornacon. Evidence that solar wind fluctuations substantially affect global convection and substorm occurrence. J. Geophys. Res., volume 114, 2009 . J. D. Mathews, S. J. Briczinski, D. D. Meisel, and C. J. Heinselman. Radio and Meteor Science Outcomes From Comparisons of Meteor Radar Observations at AMISR Poker Flat, Sondrestrom, and Arecibo. Earth Moon Planet, volume 102, pages 365-372, 2008 .