Solar spectra have been recorded from 3.05 to 3.70µm by means of a balloon borne monochromator at an altitude of 35 km and for solar zenith distances from 75° to 95°. Absorptions due to CH4 and H2O are identified as well as 03 bands observed for the first time in the atmosphere. Upper limits for the stratospheric mixing ratios of NO2 and HCHO are deduced.
{"title":"Mesure de l'absorption stratosphérique du rayonnement solaire de 3,05 à 3,70 microns","authors":"M. Ackerman, D. Frimout","doi":"10.18758/A_066","DOIUrl":"https://doi.org/10.18758/A_066","url":null,"abstract":"Solar spectra have been recorded from 3.05 to 3.70µm by means of a balloon borne monochromator at an altitude of 35 km and for solar zenith distances from 75° to 95°. Absorptions due to CH4 and H2O are identified as well as 03 bands observed for the first time in the atmosphere. \u0000 Upper limits for the stratospheric mixing ratios of NO2 and HCHO are deduced.","PeriodicalId":296277,"journal":{"name":"Bulletin de la Classe des sciences","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124543072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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.
{"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":"https://doi.org/10.18758/A_022","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":0.0,"publicationDate":"2018-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127866380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The properties of the heterosphere are discussed in terms of the behaviour of scale heights and their gradients. The height variation of the mean molecular mass leads to important gradients of scale heights in the isothermal region of the heterosphere. An analysis of the atmospheric scale height H and the density scale height Hρ which increase with altitude shows that H ≥ Hρ everywhere. Their positive gradients β and βρ may have all possible values between 0 and 1.5. The gradient βρ is not less than β in the thermosphere, but may be greater or less than β in the isothermal region depending on the thermopause temperature.
{"title":"Le problème des hauteurs d'échelle et de leurs gradients dans l'hétérosphère","authors":"G. Kockarts","doi":"10.18758/A_026","DOIUrl":"https://doi.org/10.18758/A_026","url":null,"abstract":"The properties of the heterosphere are discussed in terms of the behaviour of scale heights and their gradients. The height variation of the mean molecular mass leads to important gradients of scale heights in the isothermal region of the heterosphere. An analysis of the atmospheric scale height H and the density scale height Hρ which increase with altitude shows that H ≥ Hρ everywhere. Their positive gradients β and βρ may have all possible values between 0 and 1.5. The gradient βρ is not less than β in the thermosphere, but may be greater or less than β in the isothermal region depending on the thermopause temperature.","PeriodicalId":296277,"journal":{"name":"Bulletin de la Classe des sciences","volume":"9 8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126183697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
An analysis of the various types of density variations in the mean thermosphère is made by using the orbital data of the satellites 1966-101 G, Secor 6 and ERS 16 obtained between November 1966 and June 1967.
{"title":"Les variations de la densité atmosphérique dans la thermosphère","authors":"J. Vercheval","doi":"10.3406/barb.1969.62465","DOIUrl":"https://doi.org/10.3406/barb.1969.62465","url":null,"abstract":"An analysis of the various types of density variations in the mean thermosphère is made by using the orbital data of the satellites 1966-101 G, Secor 6 and ERS 16 obtained between November 1966 and June 1967.","PeriodicalId":296277,"journal":{"name":"Bulletin de la Classe des sciences","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131916531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Sur l'apparence de certains satellites artificiels","authors":"J. Cox","doi":"10.3406/barb.1966.62706","DOIUrl":"https://doi.org/10.3406/barb.1966.62706","url":null,"abstract":"","PeriodicalId":296277,"journal":{"name":"Bulletin de la Classe des sciences","volume":"600 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1966-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123158491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Sur la variation de la rotation et de la nutation libre de la Terre","authors":"J. Cox, J. V. Mieghem","doi":"10.3406/barb.1966.62698","DOIUrl":"https://doi.org/10.3406/barb.1966.62698","url":null,"abstract":"","PeriodicalId":296277,"journal":{"name":"Bulletin de la Classe des sciences","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1966-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122210357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Résumé. — Dans cette note, nous montrons qu'un théorème de Riesz-Bourbaki sur les espaces vectoriels réticulés permet de retrouver et de préciser un résultat de Yosida-Hewitt sur les fonctions d'ensembles simplement additives.
{"title":"Sur la décomposition d'une fonction d'ensembles simplement additive","authors":"A. Ducamp","doi":"10.3406/barb.1966.62617","DOIUrl":"https://doi.org/10.3406/barb.1966.62617","url":null,"abstract":"Résumé. — Dans cette note, nous montrons qu'un théorème de Riesz-Bourbaki sur les espaces vectoriels réticulés permet de retrouver et de préciser un résultat de Yosida-Hewitt sur les fonctions d'ensembles simplement additives.","PeriodicalId":296277,"journal":{"name":"Bulletin de la Classe des sciences","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1966-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128404401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Effect of the atmosphere on the aspect and apparent trajectory of an artificial satellite.
大气对人造卫星的星向和视轨迹的影响。
{"title":"Absorption atmosphérique et trajectoire apparente d'un satellite artificiel","authors":"J. Cox, J. Hunaerts","doi":"10.3406/barb.1965.65348","DOIUrl":"https://doi.org/10.3406/barb.1965.65348","url":null,"abstract":"Effect of the atmosphere on the aspect and apparent trajectory of an artificial satellite.","PeriodicalId":296277,"journal":{"name":"Bulletin de la Classe des sciences","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1965-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132855095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The solar hypothesis and the climatic hypothesis do not seem to exclude necessarily one another.
太阳假说和气候假说似乎并不一定相互排斥。
{"title":"Sur l'explication des fluctuations de la Rotation de la Terre","authors":"J. Cox, J. V. Mieghem","doi":"10.3406/barb.1965.65318","DOIUrl":"https://doi.org/10.3406/barb.1965.65318","url":null,"abstract":"The solar hypothesis and the climatic hypothesis do not seem to exclude necessarily one another.","PeriodicalId":296277,"journal":{"name":"Bulletin de la Classe des sciences","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1965-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133936307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract : Profiles of Lyman lines have been computed for five model atmospheres representing main-sequence B-type stars. Interstellar lines have also been considered. (Author)
摘要:对代表主序b型恒星的5个模型大气进行了莱曼谱线的计算。星际线也被考虑过。(作者)
{"title":"The Lyman Lines in the Spectrum of Main Sequence Early-Type Stars","authors":"L. Houziaux","doi":"10.3406/barb.1965.65267","DOIUrl":"https://doi.org/10.3406/barb.1965.65267","url":null,"abstract":"Abstract : Profiles of Lyman lines have been computed for five model atmospheres representing main-sequence B-type stars. Interstellar lines have also been considered. (Author)","PeriodicalId":296277,"journal":{"name":"Bulletin de la Classe des sciences","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1965-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127586150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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