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Topographie opérationnelle / Michel Brabant (2011)
Titre : Topographie opérationnelle : mesures, calculs, dessins, implantations Type de document : Guide/Manuel Auteurs : Michel Brabant, Auteur ; Béatrice Patizel, Collaborateur ; Armelle Piègle, Collaborateur ; Hélène Müller, Collaborateur Mention d'édition : 3e édition Editeur : Paris : Eyrolles Année de publication : 2011 Collection : Blanche BTP Importance : 396 p. Format : 17 x 24 cm ISBN/ISSN/EAN : 978-2-212-12847-5 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Topographie
[Termes IGN] carte Top 25
[Termes IGN] dessin cartographique
[Termes IGN] erreur systématique
[Termes IGN] implantation d'un objet
[Termes IGN] levé à grande échelle
[Termes IGN] lever des détails
[Termes IGN] lever souterrain
[Termes IGN] lever tachéométrique
[Termes IGN] mesurage d'angles
[Termes IGN] mesurage de distances
[Termes IGN] nivellement direct
[Termes IGN] nivellement indirect
[Termes IGN] plan
[Termes IGN] positionnement par GNSS
[Termes IGN] précision des mesures
[Termes IGN] système de coordonnées
[Termes IGN] système de référence géodésique
[Termes IGN] théodoliteIndex. décimale : 32.00 Topographie - généralités Résumé : (Editeur) Dans ce nouveau manuel volontairement opérationnel et abondamment illustré, on trouvera notamment la description précise des instruments de mesure et un exposé détaillé des méthodes de travail, avec calculs, dessins et techniques d'implantation. Destiné à la formation des topographes, il permettra aussi aux praticiens confirmés, de l'opérateur à l'ingénieur, d'actualiser leurs connaissances. Note de contenu : - Connaissances de base
- Mesures des angles
- Mesures des distances
- Nivellement
- Localisation terrestre
- Positionnement satellitaire
- Levé des détails et implantations
- Travaux topographiques spécifiques
- Calculs topométriques
- Dessins et plansNuméro de notice : 20572 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Manuel Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=46817 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20572-01 32.00 Livre Centre de documentation Topographie Disponible 20572-02 DEP-RECG Livre Marne-la-Vallée Dépôt en unité Exclu du prêt DORIS/Jason-2: Better than 10 cm on-board orbits available for near-real-time altimetry / Christian Jayles in Advances in space research, vol 46 n° 12 (15/12/2010)
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Titre : DORIS/Jason-2: Better than 10 cm on-board orbits available for near-real-time altimetry Type de document : Article/Communication Auteurs : Christian Jayles, Auteur ; J.P. Chauveau, Auteur ; F. Rozo, Auteur Année de publication : 2010 Article en page(s) : pp 1497 - 1512 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Techniques orbitales
[Termes IGN] altimétrie
[Termes IGN] DIODE (détermination d'orbite)
[Termes IGN] données DORIS
[Termes IGN] Jason
[Termes IGN] orbitographie
[Termes IGN] précision centimétrique
[Termes IGN] temps réel
[Termes IGN] trajectographie par DORISRésumé : (Auteur) DIODE (DORIS Immediate Orbit on-board Determination) is a real-time on-board orbit determination software, embedded in the DORIS receiver. The purpose of this paper is to focus on DIODE performances. After a description of the recent DORIS evolutions, we detail how compliance with specifications are verified during extensive ground tests before the launch, then during the in-flight commissioning phase just after the launch, and how well they are met in the routine phase and today. Future improvements are also discussed for Jason-2 as well as for the next missions. The complete DORIS ground validation using DORIS simulator and new DORIS test equipments has shown prior to the Jason-2 flight that every functional requirement was fulfilled, and also that better than 10 cm real-time DIODE orbits would be achieved on-board Jason-2. The first year of Jason-2 confirmed this, and after correction of a slowly evolving polar motion error at the end of the commissioning phase, the DIODE on-board orbits are indeed better than the 10 cm specification: in the beginning of the routine phase, the discrepancy was already 7.7 cm Root-Mean-Square (RMS) in the radial component as compared to the final Precise Orbit Ephemerides (POE) orbit. Since the first day of Jason-2 cycle 1, the real-time DIODE orbits have been delivered in the altimetry fast delivery products. Their accuracy and their 100% availability make them a key input to fairly precise Near-Real-Time Altimetry processing. Time-tagging is at the microsecond level. In parallel, a few corrections (quaternion problem) and improvements have been gathered in an enhanced version of DIODE, which is already implemented and validated. With this new version, a 5 cm radial accuracy is achieved during ground validation over more than Jason-2 first year (cycles 1–43, from July 12th, 2008 to September 11th, 2009). The Seattle Ocean Surface Topography Science Team Meeting (OSTST) has recommended an upload of this v4.02 version on-board Jason-2 in order to take benefit from more accurate real-time orbits. For the future, perhaps the most important point of this work is that a 9 mm consistency is observed on-ground between simulated and adjusted orbits, proving that the DORIS measurement is very precisely and properly modelled in the DIODE navigation software. This implies that improvement of DIODE accuracy is still possible and should be driven by enhancement of the physical models: forces and perturbations of the satellite movement, Radio/Frequency phenomena perturbing measurements. A 2-cm accuracy is possible with future versions, if analysis and model improvements continue to progress. Numéro de notice : A2010-563 Affiliation des auteurs : non IGN Thématique : IMAGERIE/POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.asr.2010.04.030 En ligne : https://doi.org/10.1016/j.asr.2010.04.030 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30755
in Advances in space research > vol 46 n° 12 (15/12/2010) . - pp 1497 - 1512[article]Towards development of a consistent orbit series for TOPEX, Jason-1, and Jason-2 / Franck G. Lemoine in Advances in space research, vol 46 n° 12 (15/12/2010)
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Titre : Towards development of a consistent orbit series for TOPEX, Jason-1, and Jason-2 Type de document : Article/Communication Auteurs : Franck G. Lemoine, Auteur ; Nikita P. Zelensky, Auteur ; Douglas S. Chinn, Auteur ; Marek Ziebart, Auteur ; Despina E. Pavlis, Auteur ; David D. Rowlands, Auteur ; Brian D. Beckley, Auteur ; Scott B. Luthcke, Auteur ; Pascal Willis , Auteur ; et al., Auteur Année de publication : 2010 Article en page(s) : pp 1513 - 1540 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] cohérence des données
[Termes IGN] données altimétriques
[Termes IGN] données DORIS
[Termes IGN] force de gravitation
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] Jason
[Termes IGN] niveau moyen des mers
[Termes IGN] orbitographie
[Termes IGN] série temporelle
[Termes IGN] surcharge océanique
[Termes IGN] télémétrie laser sur satellite
[Termes IGN] TOPEX-PoseidonRésumé : (Auteur) The TOPEX/Poseidon, Jason-1 and Jason-2 set of altimeter data now provide a time series of synoptic observations of the ocean that span nearly 17 years from the launch of TOPEX in 1992. The analysis of the altimeter data including the use of altimetry to monitor the global change in mean sea level requires a stable, accurate, and consistent orbit reference over the entire time span. In this paper, we describe the recomputation of a time series of orbits that rely on a consistent set of reference frames and geophysical models. The recomputed orbits adhere to the IERS 2003 standards for ocean and earth tides, use updates to the ITRF2005 reference frame for both the SLR and DORIS stations, apply GRACE-derived models for modeling of the static and time-variable gravity, implement the University College London (UCL) radiation pressure model for Jason-1, use improved troposphere modeling for the DORIS data, and apply the GOT4.7 ocean tide model for both dynamical ocean tide modeling and for ocean loading. The new TOPEX orbits have a mean SLR fit of 1.79 cm compared to 2.21 cm for the MGDR-B orbits. These new TOPEX orbits agree radially with independent SLR/crossover orbits at 0.70 cm RMS, and the orbit accuracy is estimated at 1.5–2.0 cm RMS over the entire TOPEX time series. The recomputed Jason-1 orbits agree radially with the Jason-1 GDR-C orbits at 1.08 cm RMS. The GSFC SLR/DORIS dynamic and reduced-dynamic orbits for Jason-2 agree radially with independent orbits from the CNES and JPL at 0.70–1.06 cm RMS. Applying these new orbits, and using the latest altimeter corrections for TOPEX, Jason-1, and Jason-2 from September 1992 to May 2009, we find a global rate in mean sea level of 3.0 + 0.4 mm/yr. Numéro de notice : A2010-564 Affiliation des auteurs : IGN+Ext (1940-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.asr.2010.05.007 Date de publication en ligne : 13/05/2010 En ligne : https://doi.org/10.1016/j.asr.2010.05.007 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30756
in Advances in space research > vol 46 n° 12 (15/12/2010) . - pp 1513 - 1540[article]On improving precision of GPS-derived height times series at GEONET stations / H. Munekane in Bulletin of the GeoSpatial Information authority of Japan, vol 58 (December 2010)
[article]
Titre : On improving precision of GPS-derived height times series at GEONET stations Type de document : Article/Communication Auteurs : H. Munekane, Auteur Année de publication : 2010 Article en page(s) : pp 39 - 46 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] altitude
[Termes IGN] Japon
[Termes IGN] positionnement par GPS
[Termes IGN] réseau géodésique local
[Termes IGN] série temporelle
[Termes IGN] station permanenteRésumé : (Auteur) This paper summarizes the effect of various noises on GEONET height times series and demonstrates how the state-of-art analysis technique can improve its quality with the results evaluated by simulations and actual observations. Three factors that may affect the GPS-derived height time series are investigated: 1) mismodeling of atmospheric delays; 2) load deformation by the atmosphere; and 3) load deformation by the ocean. It is found that : 1) the use of the conventional mapping functions that are used in the current GEONET routine analysis may introduce spurious annual height variations up to 3 mm, and these spurious signals can be considerably mitigated with the use of mapping functions based on numerical weather models; 2) annual height variations caused by the atmospheric loading are up to 3 mm ; and 3) the annual variations caused by oceanic loading deformation get larger toward the south, reaching 3 mm in the Nansei Islands. It confirmed that when corrections are applied in the GPS analysis of GEONET data, the annual height variations of GEONET stations are largely reduced. Hence, it may now be possible to detect even these small movements related to the earthquake/volcanic activities that were formally obscured by the annual height noises, offering a hope that more accurate disaster prevention information could be provided. Numéro de notice : A2010-580 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans En ligne : https://www.gsi.go.jp/common/000058372.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30771
in Bulletin of the GeoSpatial Information authority of Japan > vol 58 (December 2010) . - pp 39 - 46[article]The combination of GNSS-levelling data and gravimetric (quasi-) geoid heights in the presence of noise / R. Klees in Journal of geodesy, vol 84 n° 12 (December 2010)
[article]
Titre : The combination of GNSS-levelling data and gravimetric (quasi-) geoid heights in the presence of noise Type de document : Article/Communication Auteurs : R. Klees, Auteur ; I. Prutkin, Auteur Année de publication : 2010 Article en page(s) : pp 731 - 749 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] altitude normale
[Termes IGN] altitude orthométrique
[Termes IGN] bruit (théorie du signal)
[Termes IGN] champ de pesanteur local
[Termes IGN] collocation par moindres carrés
[Termes IGN] données GNSS
[Termes IGN] géoïde gravimétrique
[Termes IGN] hauteur ellipsoïdale
[Termes IGN] matrice de covariance
[Termes IGN] nivellement par GPS
[Termes IGN] problème des valeurs limites
[Termes IGN] Suisse
[Termes IGN] varianceRésumé : (Auteur) We propose a methodology for the combination of a gravimetric (quasi-) geoid with GNSS-levelling data in the presence of noise with correlations and/or spatially varying noise variances. It comprises two steps: first, a gravimetric (quasi-) geoid is computed using the available gravity data, which, in a second step, is improved using ellipsoidal heights at benchmarks provided by GNSS once they have become available. The methodology is an alternative to the integrated processing of all available data using least-squares techniques or least-squares collocation. Unlike the corrector-surface approach, the pursued approach guarantees that the corrections applied to the gravimetric (quasi-) geoid are consistent with the gravity anomaly data set. The methodology is applied to a data set comprising 109 gravimetric quasi-geoid heights, ellipsoidal heights and normal heights at benchmarks in Switzerland. Each data set is complemented by a full noise covariance matrix. We show that when neglecting noise correlations and/or spatially varying noise variances, errors up to 10% of the differences between geometric and gravimetric quasi-geoid heights are introduced. This suggests that if high-quality ellipsoidal heights at benchmarks are available and are used to compute an improved (quasi-) geoid, noise covariance matrices referring to the same datum should be used in the data processing whenever they are available. We compare the methodology with the corrector-surface approach using various corrector surface models. We show that the commonly used corrector surfaces fail to model the more complicated spatial patterns of differences between geometric and gravimetric quasi-geoid heights present in the data set. More flexible parametric models such as radial basis function approximations or minimum-curvature harmonic splines perform better. We also compare the proposed method with generalized least-squares collocation, which comprises a deterministic trend model, a random signal component and a random correlated noise component. Trend model parameters and signal covariance function parameters are estimated iteratively from the data using non-linear least-squares techniques. We show that the performance of generalized least-squares collocation is better than the performance of corrector surfaces, but the differences with respect to the proposed method are still significant. Numéro de notice : A2010-559 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-010-0406-2 Date de publication en ligne : 29/08/2010 En ligne : https://doi.org/10.1007/s00190-010-0406-2 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30751
in Journal of geodesy > vol 84 n° 12 (December 2010) . - pp 731 - 749[article]Réservation
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