Simultaneous observations of the 2-day wave at London (43°N, 81°W) and Saskatoon (52°N, 107°W) near 91 km altitude during the two years of 1993 and 1994 T. Thayaparan, W. K. Hocking, J. MacDougall, A. H. Manson, C. E. Meek
Annales Geophysicae, Vol. 15, pp 1324-1339, 1997