Yau, Andrew W.; Abe, Takumi; Peterson, W. K. (2007-11-01). "The polar wind: Recent observations". Journal of Atmospheric and Solar-Terrestrial Physics. Recent Advances in the Polar Wind Theories and Observations. 69 (16): 1936–1983. Bibcode:2007JASTP..69.1936Y. doi:10.1016/j.jastp.2007.08.010. ISSN1364-6826.. Quote, "All three ion species are supersonic by the time they reach 7000 km, the ion Mach number of H+ , He+ , and O + being 1.5, 1.5, and 5, respectively, at this altitude and increasing to 4.6, 2.5, and 3.5 at 50,500 km"
Yau, Andrew W.; Abe, Takumi; Peterson, W. K. (2007-11-01). "The polar wind: Recent observations". Journal of Atmospheric and Solar-Terrestrial Physics. Recent Advances in the Polar Wind Theories and Observations. 69 (16): 1936–1983. Bibcode:2007JASTP..69.1936Y. doi:10.1016/j.jastp.2007.08.010. ISSN1364-6826.. Quote, "All three ion species are supersonic by the time they reach 7000 km, the ion Mach number of H+ , He+ , and O + being 1.5, 1.5, and 5, respectively, at this altitude and increasing to 4.6, 2.5, and 3.5 at 50,500 km"
Yau, Andrew W.; Abe, Takumi; Peterson, W. K. (2007-11-01). "The polar wind: Recent observations". Journal of Atmospheric and Solar-Terrestrial Physics. Recent Advances in the Polar Wind Theories and Observations. 69 (16): 1936–1983. Bibcode:2007JASTP..69.1936Y. doi:10.1016/j.jastp.2007.08.010. ISSN1364-6826.. Quote, "All three ion species are supersonic by the time they reach 7000 km, the ion Mach number of H+ , He+ , and O + being 1.5, 1.5, and 5, respectively, at this altitude and increasing to 4.6, 2.5, and 3.5 at 50,500 km"
Yau, Andrew W.; Abe, Takumi; Peterson, W. K. (2007-11-01). "The polar wind: Recent observations". Journal of Atmospheric and Solar-Terrestrial Physics. Recent Advances in the Polar Wind Theories and Observations. 69 (16): 1936–1983. Bibcode:2007JASTP..69.1936Y. doi:10.1016/j.jastp.2007.08.010. ISSN1364-6826.. Quote, "All three ion species are supersonic by the time they reach 7000 km, the ion Mach number of H+ , He+ , and O + being 1.5, 1.5, and 5, respectively, at this altitude and increasing to 4.6, 2.5, and 3.5 at 50,500 km"