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GPS water vapor project associated to the ESCOMPTE programme: description and first results of the field experiment / Olivier Bock in Physics and chemistry of the Earth (A/B/C), vol 29 n° 2-3 ([01/03/2004])
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Titre : GPS water vapor project associated to the ESCOMPTE programme: description and first results of the field experiment Type de document : Article/Communication Auteurs : Olivier Bock , Auteur ; Erik Doerflinger, Auteur ; F. Masson, Auteur ; Andrea Walpersdorf, Auteur ; J. Van-Baelen, Auteur ; Jérôme Tarniewicz , Auteur ; et al., Auteur Année de publication : 2004 Article en page(s) : pp 149 - 157 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] analyse comparative
[Termes IGN] lidar Raman
[Termes IGN] radiosondage
[Termes IGN] tomographie par GPS
[Termes IGN] vapeur d'eauRésumé : (auteur) A dense network of 17 dual frequency GPS receivers has been operated for two weeks during June 2001 within a 20 km × 20 km area around Marseille, France, as part of the ESCOMPTE field campaign ([Cros et al., 2004. The ESCOMPTE program: an overview. Atmos. Res. 69, 241–279]; http://medias.obs-mip.fr/escompte). The goal of this GPS experiment was to provide GPS data allowing for tomographic inversions and their validation within a well-documented observing period (the ESCOMPTE campaign). Simultaneous water vapor radiometer, solar spectrometer, Raman lidar and radiosonde data are used for comparison and validation. In this paper, we highlight the motivation, issues and describe the GPS field experiment. Some first results of integrated water vapor retrievals from GPS and the other sensing techniques are presented. The strategies for GPS data processing and tomographic inversions are discussed. Numéro de notice : A2004-490 Affiliation des auteurs : IGN+Ext (1940-2011) Thématique : POSITIONNEMENT Nature : Article DOI : 10.1016/j.pce.2004.01.014 En ligne : https://doi.org/10.1016/j.pce.2004.01.014 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=103037
in Physics and chemistry of the Earth (A/B/C) > vol 29 n° 2-3 [01/03/2004] . - pp 149 - 157[article]Raman lidar for external GPS path delay calibration devoted to high accuracy height determination / Jérôme Tarniewicz in Physics and chemistry of the Earth (A/B/C), vol 27 n° 4-5 ([01/03/2002])
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Titre : Raman lidar for external GPS path delay calibration devoted to high accuracy height determination Type de document : Article/Communication Auteurs : Jérôme Tarniewicz , Auteur ; Olivier Bock , Auteur ; Jacques Pelon, Auteur ; Christian Thom , Auteur Année de publication : 2002 Article en page(s) : pp 329 - 333 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] étalonnage d'instrument
[Termes IGN] lidar RamanRésumé : (auteur) A scanning Raman lidar for the external correction of the wet path delay of GPS data is under development. Simulations of lidar signal returns for nighttime and daytime operations at 355 and 532 nm show that a millimeter precision on wet path delay is achievable. A simple inversion method to retrieve water vapor and nitrogen concentration profiles is presented. An absolute calibration procedure for instrumental factor and atmospheric transmission is discussed. Numéro de notice : A2002-248 Affiliation des auteurs : LOEMI+Ext (1985-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/S1474-7065(02)00008-6 Date de publication en ligne : 28/03/2002 En ligne : https://doi.org/10.1016/S1474-7065(02)00008-6 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=103205
in Physics and chemistry of the Earth (A/B/C) > vol 27 n° 4-5 [01/03/2002] . - pp 329 - 333[article]The effect of inhomogeneities in the lower atmosphere on coordinates determined from GPS measurements / Olivier Bock in Physics and chemistry of the Earth (A/B/C), vol 27 n° 4-5 ([01/03/2002])
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Titre : The effect of inhomogeneities in the lower atmosphere on coordinates determined from GPS measurements Type de document : Article/Communication Auteurs : Olivier Bock , Auteur ; Jérôme Tarniewicz , Auteur ; Christian Thom , Auteur ; Jacques Pelon, Auteur Année de publication : 2002 Article en page(s) : pp 323 - 328 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] données GPS
[Termes IGN] lidar Raman
[Termes IGN] retard troposphérique
[Termes IGN] zone homogèneRésumé : (auteur) A scanning Raman lidar for the external correction of the wet path delay of GPS data is under development. Simulations of lidar signal returns for nighttime and daytime operations at 355 and 532 nm show that a millimeter precision on wet path delay is achievable. A simple inversion method to retrieve water vapor and nitrogen concentration profiles is presented. An absolute calibration procedure for instrumental factor and atmospheric transmission is discussed. Numéro de notice : A2002-375 Affiliation des auteurs : LOEMI+Ext (1985-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/S1474-7065(02)00007-4 Date de publication en ligne : 28/03/2002 En ligne : https://doi.org/10.1016/S1474-7065(02)00007-4 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=103208
in Physics and chemistry of the Earth (A/B/C) > vol 27 n° 4-5 [01/03/2002] . - pp 323 - 328[article]Study of external path delay correction techniques for high accuracy height determination with GPS / Olivier Bock in Physics and chemistry of the Earth, Part A: Solid Earth and Geodesy, vol 26 n° 3 ([01/03/2001])
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Titre : Study of external path delay correction techniques for high accuracy height determination with GPS Type de document : Article/Communication Auteurs : Olivier Bock , Auteur ; Jérôme Tarniewicz , Auteur ; Christian Thom , Auteur ; Jacques Pelon, Auteur ; Michel Kasser , Auteur Année de publication : 2001 Article en page(s) : pp 165 - 171 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] lidar Raman
[Termes IGN] précision du positionnement
[Termes IGN] résidu
[Termes IGN] retard ionosphèrique
[Termes IGN] retard troposphérique
[Termes IGN] teneur en vapeur d'eau
[Termes IGN] traitement de données GNSSRésumé : (auteur) For specific applications such as permanent GPS network calibration and national leveling network surveying, a vertical accuracy of ∼1 mm for observing durations of a few hours to a few days at maximum in 10–100-km baselines would be required. To achieve a 1-mm accuracy in height determinations with differential-GPS measurements, path delay must be corrected with an accuracy of ∼0.3 mm. This level of accuracy is not achievable with standard GPS data analysis procedures. External correction from a water vapor remote sensing technique is therefore necessary. Microwave radiometers, which have been most extensively used for this purpose, solar spectrometers, DIAL and Raman lidars are considered in this paper. The principle and performance of these techniques is reviewed in the context of wet path delay retrieving. Namely, we evaluate the errors arising during the conversion of raw measurements to wet path delay, using retrieval coefficients or standard profiles. It is shown that changes in temperature profiles can produce errors of up to 1 cm in wet path delay with microwave radiometers. Similarly, mismodeled temperature profiles can produce errors of 2–3 mm in wet path delay with DIAL and Raman lidars. Raman lidar offers the possibility to retrieve the temperature profile from total air density. Assuming that absolute concentrations of water vapor and dry gases can be retrieved, the accuracy would be unbiased. In addition, Raman lidar would also allow for the correction of hydrostatic path delay without requiring the use of mapping functions. This might reduce the residual errors due to horizontal pressure and temperature gradients. This technique will therefore be investigated in more details in a future study. Numéro de notice : A2001-261 Affiliation des auteurs : LOEMI+Ext (1985-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/S1464-1895(01)00041-2 Date de publication en ligne : 07/05/2001 En ligne : https://doi.org/10.1016/S1464-1895(01)00041-2 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=103207
in Physics and chemistry of the Earth, Part A: Solid Earth and Geodesy > vol 26 n° 3 [01/03/2001] . - pp 165 - 171[article]