%0 Journal Article
%T VariationsofThermosphereDensityBasedonJointAnalysisofIn-SituMeasurementDataFromShenzhouSpacecrafts
%A SUN
%A Lilin
%A QIN
%A Guotai
%A ZHU
%A Guangwu
%J 空间科学学报
%P 216-222
%D 2012
%X BasedonthemeasurementsmadebyAtmosphericDensityDetectors(ADDs)onboardChinesespacecraftShenzhou2-4,thevariationsofthermospheredensityarerevealed.Duringthequietperiod,thedensityatspacecraftaltitudeof330～410kmexhibitedadominantdiurnalvariation,withhighvalueondaysideandlowvalueonnightside.Theratioofthediurnalmaximumdensitytotheminimumrangedfrom1.7to2.0.Theratioshowsapositivecorrelationwiththelevelofsolaractivityandanegativecorrelationwiththelevelofgeomagneticactivity.Whenageomagneticdisturbancecomes,theatmosphericdensityatthealtitudeof330～410kmdisplayedaglobalenhancement.Forastronggeomagneticdisturbance,theatmosphericdensityincreasedbyabout56%,andreacheditsmaximumabout6～7hoursafterthegeomagneticdisturbancepeak.Thedensityasymmetrywasalsoobservedbothinthesouthernandnorthernhemisphereduringthegeomagneticdisturbancepeak.
%K Thermosphere
%K Atmosphericdensity
%K Solaractivity
%K Geomagneticdisturbance
%U http://www.cjss.ac.cn/CN/abstract/abstract1813.shtml