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Processing of Raman lidar measurements for water vapor mixing ratio retrieval / Pierre Bosser (2008)
Titre : Processing of Raman lidar measurements for water vapor mixing ratio retrieval Type de document : Article/Communication Auteurs : Pierre Bosser , Auteur ; Olivier Bock , Auteur ; Christian Thom , Auteur ; Jacques Pelon, Auteur Editeur : International Coordination Group on Laser Atmospheric Studies Année de publication : 2008 Conférence : ILRC 2008, 24th International Laser Radar Conference 23/06/2008 27/06/2008 Boulder Colorado - Etats-Unis Importance : pp 1041 - 1044 Note générale : PAS DE DOCUMENT, NI D'URL, NI D'ACTES PAPIER CONSERVE Langues : Anglais (eng) Descripteur : [Termes IGN] lidar Raman
[Termes IGN] vapeur d'eauNuméro de notice : C2008-042 Affiliation des auteurs : LOEMI+Ext (1985-2011) Thématique : POSITIONNEMENT Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=103436 Rapport au Cospar 2008, Comité Mondial de la Recherche Spatiale, 37e Assemblée scientifique, la recherche spatiale en France, 13-20 juillet 2008 / Yves d' Escatha (2008)
Titre : Rapport au Cospar 2008, Comité Mondial de la Recherche Spatiale, 37e Assemblée scientifique, la recherche spatiale en France, 13-20 juillet 2008 Titre original : Report to Cospar 2008 World Committee for Space Research, 37th scientific Assembly, space science research in France, 13-20 July 2008 Type de document : Actes de congrès Auteurs : Yves d' Escatha, Éditeur scientifique ; Centre national d'études spatiales, Auteur Editeur : Paris, Toulouse, Kourou [France] : Centre National d'Etudes Spatiales CNES Année de publication : 2008 Conférence : COSPAR 2008, 37th scientific assembly of the World Committee for Space Research 13/07/2008 20/07/2008 Montréal Québec - Canada OA program & abstracts only Importance : 113 p. Format : 21 x 30 cm Langues : Anglais (eng) Français (fre) Descripteur : [Vedettes matières IGN] Technologies spatiales
[Termes IGN] astronomie
[Termes IGN] atmosphère terrestre
[Termes IGN] biosphère
[Termes IGN] climat
[Termes IGN] développement durable
[Termes IGN] géodynamique
[Termes IGN] magnétosphère
[Termes IGN] mécanique spatiale
[Termes IGN] océan
[Termes IGN] sciences de la matière
[Termes IGN] sciences de la Terre et de l'univers
[Termes IGN] soleil (étoile)
[Termes IGN] SPOT5
[Termes IGN] système solaireNuméro de notice : 15369 Affiliation des auteurs : non IGN Thématique : IMAGERIE/POSITIONNEMENT Nature : Actes DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=34760 Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 15369-01 CG2008 Livre Centre de documentation Congrès Exclu du prêt 15369-02 DEP-EXM Livre LASTIG Dépôt en unité Exclu du prêt Water vapour intercomparison effort in the frame of the convective and orographically-induced precipitation study / Rohini Bhawar (2008)
Titre : Water vapour intercomparison effort in the frame of the convective and orographically-induced precipitation study Type de document : Article/Communication Auteurs : Rohini Bhawar, Auteur ; Paolo di Girolamo, Auteur ; Cyrille Flamant, Auteur ; Dietrich Althausen, Auteur ; Andreas Behrendt, Auteur ; Alan Blyth, Auteur ; Olivier Bock , Auteur ; Pierre Bosser , Auteur ; et al., Auteur Editeur : International Coordination Group on Laser Atmospheric Studies Année de publication : 2008 Conférence : ILRC 2008, 24th International Laser Radar Conference 23/06/2008 27/06/2008 Boulder Colorado - Etats-Unis OA program & abstracts only Importance : pp 1017 - 1020 Note générale : PAS DE DOCUMENT, NI D'URL, NI D'ACTES PAPIER CONSERVE Langues : Anglais (eng) Descripteur : [Termes IGN] lidar Raman
[Termes IGN] vapeur d'eauNuméro de notice : C2008-047 Affiliation des auteurs : LOEMI+Ext (1985-2011) Thématique : POSITIONNEMENT Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=103437 Comparison of ground-based GPS precipitable water vapour to independent observations and NWP model reanalyses over Africa / Olivier Bock in Quarterly Journal of the Royal Meteorological Society, vol 133 n° 629 (Octobre 2007 part B)
[article]
Titre : Comparison of ground-based GPS precipitable water vapour to independent observations and NWP model reanalyses over Africa Type de document : Article/Communication Auteurs : Olivier Bock , Auteur ; Marie-Noëlle Bouin , Auteur ; Andrea Walpersdorf, Auteur ; Jean-Philippe Lafore, Auteur ; Serge Janicot, Auteur ; Françoise Guichard, Auteur ; Anna Agusti-Panareda, Auteur Année de publication : 2007 Article en page(s) : pp 2011 - 2027 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] Afrique (géographie physique)
[Termes IGN] analyse comparative
[Termes IGN] cohérence des données
[Termes IGN] mousson
[Termes IGN] vapeur d'eauRésumé : (auteur) This study aims at assessing the consistency between different precipitable water vapour (PWV) datasets over Africa (between 35°N and 10°S). This region is characterized by large spatial and temporal variability of humidity but also by the scarcity of its operational observing network, limiting our knowledge of the hydrological cycle. We intercompare data from observing techniques such as ground-based Global Positioning System (GPS), radiosondes, AERONET sun photometers and SSM/I, as well as reanalyses from European Centre for Medium-Range Weather Forecasts (ERA-40) and National Center for Environmental Prediction (NCEP2). The GPS data, especially, are a new source of PWV observation in this region. PWV estimates from nine ground-based GPS receivers of the international GPS network data are used as a reference dataset to which the others are compared. Good agreement is found between observational techniques, though dry biases of 12–14% are evidenced in radiosonde data at three sites. Reasonable agreement is found between the observational datasets and ERA-40 (NCEP2) reanalyses with maximum bias ⩽9% (14%) and standard deviation ⩽17% (20%). Since GPS data were not assimilated in the ERA-40 and NCEP2 reanalyses, they allow for a fully independent validation of the reanalyses. They highlight limitations in the reanalyses, especially at time-scales from sub-daily to periods of a few days. This work also demonstrates the high potential of GPS PWV estimates over Africa for the analysis of the hydrological cycle, at time-scales ranging between sub-diurnal to seasonal. Such observations can help studying atmospheric processes targeted by the African Monsoon Multidisciplinary Analysis project. Numéro de notice : A2007-690 Affiliation des auteurs : LAREG+Ext (1991-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1002/qj.185 Date de publication en ligne : 20/09/2007 En ligne : https://doi.org/10.1002/qj.185 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=102776
in Quarterly Journal of the Royal Meteorological Society > vol 133 n° 629 (Octobre 2007 part B) . - pp 2011 - 2027[article]Assessment of GPS data for meteorological applications over Africa: Study of error sources and analysis of positioning accuracy / Andrea Walpersdorf in Journal of Atmospheric and Solar-Terrestrial Physics, vol 69 n° 12 (August 2007)
[article]
Titre : Assessment of GPS data for meteorological applications over Africa: Study of error sources and analysis of positioning accuracy Type de document : Article/Communication Auteurs : Andrea Walpersdorf, Auteur ; Marie-Noëlle Bouin , Auteur ; Olivier Bock , Auteur ; Erik Doerflinger, Auteur Année de publication : 2007 Article en page(s) : pp 1312 - 1330 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] Afrique tropicale
[Termes IGN] données météorologiques
[Termes IGN] mousson
[Termes IGN] précision du positionnement
[Termes IGN] retard troposphérique zénithal
[Termes IGN] vapeur d'eauRésumé : (auteur) The aim of this study is to assess the availability and quality of data from the International GNSS Service (IGS) Global Positioning System (GPS) network in Africa, especially for retrieving zenith tropospheric delay (ZTD), from which precipitable water vapour (PWV) can be derived, in view of application to the African Monsoon Multidisciplinary Analysis (AMMA) project. Three major error sources for the GPS data analysis evaluating PWV in Africa are the accuracy of the satellite orbits, the correction for the radio delay induced by the ionosphere and the vertical site displacements due to ocean loading. The first part of this study examines these error sources and the validity of GPS data for meteorological applications in Africa in dedicated analyses spanning the year 2001. These analyses were performed using the IGS precise orbits. Weak degradation of baseline precision with increasing baseline lengths suggests that the average orbital error is not limiting the GPS analysis in Africa. The impact of the ionosphere has been evaluated during a maximum of solar activity in 2001. The loss of L2 data has actually been observed. It amounts to 2% on average for 2001, with maxima of 8% during magnetic storm events. A slight decrease in formal accuracy of ZTD seems to be related to the loss of L2 data at the end of the day. This indicates that scintillation effects are present in the GPS observations but however are not a major limitation. The impact of ocean loading is found to be significant on ZTD estimates (up to ±2 mm in equivalent PWV). The use of a proper ocean loading model eliminates this effect.
The second aspect of this study concerns the IGS analysis quality for the African stations. The accuracy has been assessed through position dispersion between individual solutions and the most recent version of the IGS combined solution IGb00, and residuals from the transformation of the IGS combined solution into the International Terrestrial Reference Frame 2005. The positioning performance of the IGS analysis is consistent with an accuracy in ZTD of ±6 mm (±1 mm in PWV), as requested for meteorological applications such as planned in AMMA.Numéro de notice : A2007-672 Affiliation des auteurs : LAREG+Ext (1991-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.jastp.2007.04.008 Date de publication en ligne : 08/05/2007 En ligne : https://doi.org/10.1016/j.jastp.2007.04.008 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=102771
in Journal of Atmospheric and Solar-Terrestrial Physics > vol 69 n° 12 (August 2007) . - pp 1312 - 1330[article]Spectral calibration and atmospheric correction of ultra-fine spectral and spatial resolution remote sensing data: Application to CASI-1500 data / L. Guanter in Remote sensing of environment, vol 109 n° 1 (12 July 2007)PermalinkLidar et applications en géophysique externe / P.H. Flamant in Revue Française de Photogrammétrie et de Télédétection, n° 186 (Juin 2007)PermalinkMultiscale analysis of precipitable water vapor over Africa from GPS data and ECMWF analyses / Olivier Bock in Geophysical research letters, vol 34 n° 9 (16 May 2007)PermalinkThe EU-Cloudmap project: cirrus and contrail cloud-top maps from satellites for weather forecasting climate change analysis / J.P. Muller in International Journal of Remote Sensing IJRS, vol 28 n° 9 (May 2007)PermalinkAtmospheric correction algorithm for MERIS above case-2 waters / Th. Schroeder in International Journal of Remote Sensing IJRS, vol 28 n°7-8 (April 2007)PermalinkHigher order ionospheric effects in precise GNSS positioning / M. Mainul Hoque in Journal of geodesy, vol 81 n° 4 (April 2007)PermalinkA data-mining approach to associating MISR smoke plume heights with MODIS fire measurements / D. Mazzoni in Remote sensing of environment, vol 107 n° 1-2 (15 March 2007)PermalinkCalibration errors on experimental slant total electron content (TEC) determined with GPS / L. Ciraolo in Journal of geodesy, vol 81 n° 2 (February 2007)PermalinkDiurnal Cycle of Water Vapor as Documented by a Dense GPS Network in a Coastal Area during ESCOMPTE IOP2 / Sophie Bastin in Journal of Applied Meteorology and Climatology, vol 46 n° 2 (February 2007)PermalinkEstimating atmospheric transmission and surface reflectance from a glint-contaminated spectral image / W. Philpot in IEEE Transactions on geoscience and remote sensing, vol 45 n° 2 (February 2007)Permalink