%0 Journal Article
%T Statisticsoftheinterplanetarymagneticfieldsobservedat0.72AUand1AU
%A Li
%A Xiaoyu
%A Zhang
%A Tielong
%J 空间科学学报
%P 356-361
%D 2010
%X ThispaperpresentstheInterplanetaryMagneticField(IMF)observationsat0.72AUmeasuredbyVenusExpress(VEX)and1AUbyAdvancedCompositionExplorer(ACE)in2007.Thedistributionsofdailyaveragesof$B$arelognormalinbothlocations.Themultiscalestructureofthemagneticfieldfluctuationswasdescribedbystudyingtheincrementsof$B$overarangescalesfrom10minto21.3hours.AlltheProbabilityDistributionFunctions(PDFs)canbedescribedquantitativelybyTsallisdistributionfunction.Ontheeclipticplanefrom0.72AUto1AU,theentropyindexqincreaseswithdistanceoverallscales,indicatingtheintermittencyofturbulenceisgrowing.ThewidthsofthePDFsat0.72AUarelargerthanthoseat1AUatallscales,whichindicatingtheturbulenceat0.72AUismoreintensethanthatat1AU.Thishelpsusunderstandthenatureanddevelopmentofthemagneticfieldfluctuations.
%K IMF
%K Tsallisdistribution
%K Solarwindfluctuations
%U http://www.cjss.ac.cn/CN/abstract/abstract1485.shtml