Variations in Mesospheric Neutral Densities from Rayleigh Lidar Observations at Utah State UniversityDavid L. Barton, Vincent B. Wickwar, Joshua P. Herron, Leda Sox and Luis A. NavarroEPJ Web of Conferences, 119 (2016) 13006DOI: https://doi.org/10.1051/epjconf/201611913006