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Satellite-Earth range measurements : Correction of the excess path length due to atmospheric water vapour by ground based microwave radiometry / Gunnar Elgered (1985)

Public Titre : Satellite-Earth range measurements : Correction of the excess path length due to atmospheric water vapour by ground based microwave radiometry Type de document : Rapport Auteurs : Gunnar Elgered, Auteur ; B. Ronnang, Auteur ; E. Winberg, Auteur ; J. Askne, Auteur Editeur : Göteborg [Suède] : Chalmers University of Technology Année de publication : 1985 Collection : Research report num. 147 Importance : 112 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Rayonnement électromagnétique [Termes IGN] hyperfréquence [Termes IGN] propagation ionosphérique [Termes IGN] propagation troposphérique [Termes IGN] radiomètre à hyperfréquence [Termes IGN] teneur en vapeur d'eau [Termes IGN] water vapour radiometer Index. décimale : 24.30 Rayonnement électromagnétique Résumé : (Auteur) This report deals with the excess delay of radio waves penetrating the neutral atmosphere of the earth, especially the delay due to water vapour, and reviews the state of the art of sounding techniques and instrumentation, in particular microwave radiometry. The physical background of the water vapour radiometer (WVR) method is presented and seven different types of WVR are described in detail. The expected accuracies of wet path delays vary with the local climate as well as with instrumental errors and the operating frequencies of the WVR. It is shown that errors in the wet path delay for zenith observations range from O.M to 0.9 cm rms for optimum WVR frequencies and instrumental errors of 0.5 K rms. Two different WVR designs - one with high accuracy and one with low cost (but less accurate) - are proposed for the ESA POPSAT system. Numéro de notice : 18239 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Rapport Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=41451

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18239-01	24.30	Livre	Centre de documentation	Physique	Disponible

Satellite Earth range measurements : correction of the excess path length due to atmospheric water vapour by ground based microwave radiometry / Gunnar Elgered (1985)

Public Titre : Satellite Earth range measurements : correction of the excess path length due to atmospheric water vapour by ground based microwave radiometry Type de document : Rapport Auteurs : Gunnar Elgered, Auteur ; E. Ronnang, Auteur ; E. Winberg, Auteur ; J. Askne, Auteur Editeur : Göteborg [Suède] : Chalmers University of Technology Année de publication : 1985 Collection : Research report num. 147 Importance : 112 p. Format : 21 x 30 cm Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement du signal [Termes IGN] atmosphère terrestre [Termes IGN] humidité de l'air [Termes IGN] hyperfréquence [Termes IGN] onde radioélectrique [Termes IGN] propagation troposphérique [Termes IGN] radiomètre à hyperfréquence [Termes IGN] vapeur d'eau Index. décimale : 24.20 Traitement du signal Résumé : (Auteur) This report deals with the excess delay of radio waves penetrating the neutral atmosphere of the earth, especially the delay due to water vapour, and reviews the state of the art of sounding techniques and instrumentation, in particular microwave radiometry. The physical background of the water vapour radiometer (WVR) method is presented and seven different types of WVR are described in detail. The expected accuracies of wet path delays vary with the local climate as well as with instrumental errors and the operating frequencies of the WVR. It is shown that errors in the wet path delay for zenith observations range from 0.4 to 0.9 cm rms for optimum WVR frequencies and instrumental errors of 0.5 K rms. Two different WVR designs - one with high accuracy and one with low cost (but less accurate) - are proposed for the ESA POPSAT system. Numéro de notice : 56389 Affiliation des auteurs : non IGN Thématique : IMAGERIE/POSITIONNEMENT Nature : Rapport Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=43781

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
56389-01	24.20	Livre	Centre de documentation	Physique	Disponible