The Martian ionosphere in light of the Viking observations

摘要: A theoretical model has been constructed in which the ion density and electron temperature distributions are calculated by solving coupled continuity-momentum equations energy equations. The latest experimental results from Viking 1 2 landers used to vary some of parameters order obtain agreement between results. It is found that solar EUV radiation alone not able maintain observed high temperatures. was also established coupling gas insufficient account for measured temperatures even presence very large Direct heat input gas, probably due wind-ionosphere interactions, can result values reasonable with observations. densities present agree well observations chemically controlled region, but at higher altitudes, dynamic transport processes need be invoked achieve consistency among values.