{"title":"L'effet de la diffusion thermique sur la distribution de l'hélium dans l'hétérosphère","authors":"G. Kockarts","doi":"10.18758/A_022","DOIUrl":null,"url":null,"abstract":"The effect of thermal diffusion on the vertical distribution of helium in the heterosphere is discussed. It is shown that an increase in the helium concentration of 1 .4 to 2.4 at the thermopause level, due to thermal diffusion, leads to atmospheric densities explaining the observed drag of the satellite Echo 1.","PeriodicalId":296277,"journal":{"name":"Bulletin de la Classe des sciences","volume":"85 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2018-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin de la Classe des sciences","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.18758/A_022","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
The effect of thermal diffusion on the vertical distribution of helium in the heterosphere is discussed. It is shown that an increase in the helium concentration of 1 .4 to 2.4 at the thermopause level, due to thermal diffusion, leads to atmospheric densities explaining the observed drag of the satellite Echo 1.
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