Descripteur
Termes descripteurs IGN > sciences naturelles > sciences de la Terre et de l'univers > astronomie > système solaire > soleil > rayonnement solaire
rayonnement solaire |



Etendre la recherche sur niveau(x) vers le bas
Galileo and QZSS precise orbit and clock determination using new satellite metadata / Xingxing Li in Journal of geodesy, vol 93 n° 8 (August 2019)
![]()
[article]
Titre : Galileo and QZSS precise orbit and clock determination using new satellite metadata Type de document : Article/Communication Auteurs : Xingxing Li, Auteur ; Yongqiang Yuan, Auteur ; Jiande Huang, Auteur ; et al., Auteur Année de publication : 2019 Article en page(s) : pp 1123 - 1136 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes descripteurs IGN] Capacité opérationnelle totale
[Termes descripteurs IGN] centre de phase
[Termes descripteurs IGN] constellation Galileo
[Termes descripteurs IGN] données satellitaires
[Termes descripteurs IGN] GIOVE (satellite)
[Termes descripteurs IGN] horloge du satellite
[Termes descripteurs IGN] lacet
[Termes descripteurs IGN] métadonnées
[Termes descripteurs IGN] modèle d'orbite
[Termes descripteurs IGN] orbite précise
[Termes descripteurs IGN] orbitographie
[Termes descripteurs IGN] Quasi-Zenith Satellite System
[Termes descripteurs IGN] rayonnement solaire
[Termes descripteurs IGN] variance d'AllanRésumé : (auteur) During 2016–2018, satellite metadata/information including antenna parameters, attitude laws and physical characteristics such as mass, dimensions and optical properties were released for Galileo and QZSS (except for the QZS-1 optical coefficients). These metadata are critical for improving the accuracy of precise orbit and clock determination. In this contribution, we evaluate the benefits of these new metadata to orbit and clock in three aspects: the phase center offsets and variations (PCO and PCV), the yaw-attitude model and solar radiation pressure (SRP) model. The updating of Galileo PCO and PCV corrections, from the values estimated by Deutsches Zentrum für Luft- und Raumfahrt and Deutsches GeoForschungsZentrum to the chamber calibrations disclosed by new metadata, has only a slight influence on Galileo orbits, with overlap differences within only 1 mm. By modeling the yaw attitude of Galileo satellites and QZS-2 spacecraft (SVN J002) according to new published attitude laws, the residuals of ionosphere-free carrier-phase combinations can be obviously decreased in yaw maneuver seasons. With the new attitude models, the 3D overlap RMS in eclipse seasons can be decreased from 12.3 cm, 14.7 cm, 16.8 cm and 34.7 cm to 11.7 cm, 13.4 cm, 15.8 cm and 32.9 cm for Galileo In-Orbit Validation (IOV), Full Operational Capability (FOC), FOC in elliptical orbits (FOCe) and QZS-2 satellites, respectively. By applying the a priori box-wing SRP model with new satellite dimensions and optical coefficients, the 3D overlap RMS are 5.3 cm, 6.2 cm, 5.3 cm and 16.6 cm for Galileo IOV, FOCe, FOC and QZS-2 satellites, with improvements of 11.0%, 14.7%, 14.0% and 13.8% when compared with the updated Extended CODE Orbit Model (ECOM2). The satellite laser ranging (SLR) validation reveals that the a priori box-wing model has smaller mean biases of − 0.4 cm, − 0.4 cm and 0.6 cm for Galileo FOCe, FOC and QZS-2 satellites, while a slightly larger mean bias of − 1.0 cm is observed for Galileo IOV satellites. Moreover, the SLR residual dependencies of Galileo IOV and FOC satellites on the elongation angle almost vanish when the a priori box-wing SRP model is applied. As for satellite clocks, a visible bump appears in the Modified Allan deviation at integration time of 20,000 s for Galileo Passive Hydrogen Maser with ECOM2, while it almost vanishes when the a priori box-wing SRP model and new metadata are applied. The standard deviations of clock overlap can also be significantly reduced by using new metadata. Numéro de notice : A2019-383 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-019-01230-4 date de publication en ligne : 02/02/2019 En ligne : https://doi.org/10.1007/s00190-019-01230-4 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=93462
in Journal of geodesy > vol 93 n° 8 (August 2019) . - pp 1123 - 1136[article]Seasonal pattern in time series of variances of GPS residual errors Anova estimates / Darko Anđić in Geodetski vestnik, vol 63 n° 2 (June - August 2019)
![]()
[article]
Titre : Seasonal pattern in time series of variances of GPS residual errors Anova estimates Type de document : Article/Communication Auteurs : Darko Anđić, Auteur Année de publication : 2019 Article en page(s) : pp 260 - 271 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes descripteurs IGN] double différence
[Termes descripteurs IGN] positionnement par GPS
[Termes descripteurs IGN] propagation ionosphérique
[Termes descripteurs IGN] propagation troposphérique
[Termes descripteurs IGN] rayonnement solaire
[Termes descripteurs IGN] résidu
[Termes descripteurs IGN] série temporelle
[Termes descripteurs IGN] variance
[Termes descripteurs IGN] variation saisonnièreRésumé : (auteur) In this paper, which represents a continuation of the previous author's work, an inconstancy of GPS residual error ANOVA estimates and their variances are presented. For the purpose of the analysis, fixed solutions for all of the three coordinates, e (eastwards), n (northwards) and u (upwards), obtained by using ionosphere-free (L0) linear combination of double-difference phase observations in the processing of GPS data, were employed. The aim of the research was to consider the behaviour of variances of GPS residual error ANOVA estimates in time because there has not been any paper dealing with that issue so far. Herein, it turned out a seasonal pattern in related time series was present. In addition, it was concluded there was a difference in ANOVA estimate extreme values obtained when one considered daily data subsets compared to those obtained in the approach considering monthly data of the fixed solutions. GPS data collected at ending stations of a baseline of 40 km in length within a four-year period, involving the lowest and increased solar activity, were used in calculations. Numéro de notice : A2019-405 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.15292/geodetski-vestnik.2019.02.260-271 En ligne : http://dx.doi.org/10.15292/geodetski-vestnik.2019.02.260-271 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=93509
in Geodetski vestnik > vol 63 n° 2 (June - August 2019) . - pp 260 - 271[article]Réservation
Réserver ce documentExemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 139-2019021 SL Revue Centre de documentation Revues en salle Disponible Temporal and spatial high-resolution climate data from 1961 to 2100 for the German National Forest Inventory (NFI) / Helge Dietrich in Annals of Forest Science [en ligne], vol 76 n° 1 (March 2019)
![]()
[article]
Titre : Temporal and spatial high-resolution climate data from 1961 to 2100 for the German National Forest Inventory (NFI) Type de document : Article/Communication Auteurs : Helge Dietrich, Auteur ; Thilo Wolf, Auteur ; Tobias Kawohl, Auteur ; Jan Wehberg, Auteur ; Gerald Kändler, Auteur ; Tobias Mette, Auteur ; Arno Röder, Auteur ; ürgen Böhner, Auteur Année de publication : 2019 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes descripteurs IGN] Allemagne
[Termes descripteurs IGN] changement climatique
[Termes descripteurs IGN] données environnementales
[Termes descripteurs IGN] données météorologiques
[Termes descripteurs IGN] historique des données
[Termes descripteurs IGN] inventaire forestier étranger (données)
[Termes descripteurs IGN] largeur de bande
[Termes descripteurs IGN] modèle numérique de surface
[Termes descripteurs IGN] productivité
[Termes descripteurs IGN] rayonnement solaire
[Termes descripteurs IGN] régression géographiquement pondérée
[Termes descripteurs IGN] série temporelle
[Termes descripteurs IGN] station météorologique
[Vedettes matières IGN] Inventaire forestierRésumé : (auteur) The “NFI 2012 environmental data base climate” is part of the environmental database of the German National Forest Inventory. It contains climate information for 26,450 inventory points generated from gridded daily climate data for 1961–2100 at a spatial resolution of 250 m. Grids are based on DWD-Observations and REMO EURO-CORDEX climate projections. Access to the databases is provided via the URL: https://doi.org/10.3220/DATA/20180823-102429. Associated metadata are available at https://agroenvgeo.data.inra.fr/geonetwork/srv/fre/catalog.search#/metadata/d0789030-c94e-4883-8d38-2a7332c98673. Numéro de notice : A2019-043 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1007/s13595-018-0788-5 date de publication en ligne : 23/01/2019 En ligne : https://doi.org/10.1007/s13595-018-0788-5 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=92049
in Annals of Forest Science [en ligne] > vol 76 n° 1 (March 2019)[article]Simultaneous characterization of objects temperature and radiative properties through multispectral infrared thermography / Thibaud Toullier (2019)
![]()
Titre : Simultaneous characterization of objects temperature and radiative properties through multispectral infrared thermography Titre original : Caractérisation conjointe de la température et des propriétés radiatives des objets par thermographie infrarouge multispectrale Type de document : Thèse/HDR Auteurs : Thibaud Toullier, Auteur ; Laurent Mevel, Directeur de thèse ; Jean Dumoulin, Directeur de thèse Editeur : Rennes : Université de Rennes 1 Année de publication : 2019 Importance : 233 p. Format : 21 x 30 cm Note générale : bibliographie
Thèse de Doctorat Mathématique et Sciences et Technologies de l’Information et de la Communication, Spécialité Signal, Image, Vision, Université de Rennes 1Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes descripteurs IGN] construction
[Termes descripteurs IGN] contrôle thermique
[Termes descripteurs IGN] données météorologiques
[Termes descripteurs IGN] données multicapteurs
[Termes descripteurs IGN] estimation bayesienne
[Termes descripteurs IGN] filtre de Kalman
[Termes descripteurs IGN] image multibande
[Termes descripteurs IGN] image thermique
[Termes descripteurs IGN] méthode de Monte-Carlo par chaînes de Markov
[Termes descripteurs IGN] Python (langage de programmation)
[Termes descripteurs IGN] rayonnement solaire
[Termes descripteurs IGN] scène 3D
[Termes descripteurs IGN] surveillance d'ouvrage
[Termes descripteurs IGN] thermographieRésumé : (auteur) The latest technological improvements in low-cost infrared cameras have brought new opportunities for long-term infrastructures monitoring. The accurate measurement of surfaces' temperatures is facing the lack of knowledge of radiatives properties of the scene. By using multi-sensors instrumentation, the measurement model can be refined to get a better estimate of the temperature. To overcome a lack of sensors instrumentation, it is shown that online and free available climatic data can be used. Then, Bayesian methods to estimate simultaneously the emissivity and temperature have been developed and compared to literature's methods. A radiative exchange simulator of 3D scenes have been developed to compare those different methods on numerical data. This software uses the hardware acceleration as well as a GPGPU approach to reduce the computation time. As a consequence, obtained numerical results emphasized an advanced use of multi-spectral infrared thermography for the monitoring of structures. This simultaneous estimation enables to have an estimate of the temperature by infrared thermography with a known uncertainty. Note de contenu : Introduction
1- Context and problem positioning
2- Bibliographical study
3- In-situ long-term thermal monitoring of structures: environmental measurements bias compensation
4- Study and development of an infrared multispectral images simulator
5- Proposed and studied methods for the simultaneous estimation of temperature and emissivity
Conclusion and future workNuméro de notice : 25705 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Thèse française Note de thèse : Thèse de Doctorat : Signal, Image, Vision : Rennes 1 : 2019 En ligne : https://hal.archives-ouvertes.fr/tel-02389051 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=94850 A method of downscaling temperature maps based on analytical hillshading for use in species distribution modelling / Ángel M. Felicísimo in Cartography and Geographic Information Science, Vol 45 n° 4 (July 2018)
![]()
[article]
Titre : A method of downscaling temperature maps based on analytical hillshading for use in species distribution modelling Type de document : Article/Communication Auteurs : Ángel M. Felicísimo, Auteur ; Miguel A. Martín-Tardío, Auteur Année de publication : 2018 Article en page(s) : pp 329 - 338 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie thématique
[Termes descripteurs IGN] carte climatique
[Termes descripteurs IGN] carte thématique
[Termes descripteurs IGN] distribution spatiale
[Termes descripteurs IGN] estompage analytique
[Termes descripteurs IGN] image Landsat-8
[Termes descripteurs IGN] modèle numérique de terrain
[Termes descripteurs IGN] rayonnement solaire
[Termes descripteurs IGN] températureRésumé : (Auteur) Climate maps have been widely used for the construction of species distribution models. These maps derive from interpolation of data collected by meteorological stations. The sparse distribution of stations generates maps with coarse spatial resolution that are unable to detect microclimates or areas that can serve as plant or animal refuges. This work proposes a method for downscaling temperature maps using the solar radiation falling upon hillsides as predictor for the influence of relief on local variability. Solar irradiance is estimated from a digital elevation model of the study area using a routine based on analytical hillshading. Some examples of downscaling from 1 km to 25 m spatial resolution are shown. The results are compared with the surface temperature maps from Landsat 8 satellite imagery. Numéro de notice : A2018-134 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/15230406.2017.1338620 date de publication en ligne : 19/06/2017 En ligne : https://doi.org/10.1080/15230406.2017.1338620 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=89666
in Cartography and Geographic Information Science > Vol 45 n° 4 (July 2018) . - pp 329 - 338[article]Réservation
Réserver ce documentExemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 032-2018041 SL Revue Centre de documentation Revues en salle Disponible Use of LiDAR for calculating solar irradiance on roofs and façades of buildings at city scale: Methodology, validation, and analysis / Liang Cheng in ISPRS Journal of photogrammetry and remote sensing, vol 138 (April 2018)
PermalinkFactors affecting forest dynamics in the Iberian Peninsula from 1987 to 2012 : The role of topography and drought / Juan José Vidal-Macua in Forest ecology and management, vol 406 (15 December 2017)
PermalinkEstimating the solar transmittance of urban trees using airborne LiDAR and radiative transfer simulation / Haruki Oshio in IEEE Transactions on geoscience and remote sensing, vol 54 n° 9 (September 2016)
PermalinkThin cloud removal based on signal transmission principles and spectral mixture analysis / Meng Xu in IEEE Transactions on geoscience and remote sensing, vol 54 n° 3 (March 2016)
PermalinkEffet de l’exposition sur la richesse et la composition floristique des lisières forestières dans le Gâtinais oriental (Loiret) / Richard Chevalier in Revue forestière française [en ligne], vol 67 n° 5 (septembre 2015)
PermalinkCODE’s new solar radiation pressure model for GNSS orbit determination / D. Arnold in Journal of geodesy, vol 89 n° 8 (August 2015)
PermalinkEnhanced solar radiation pressure modeling for Galileo satellites / Olivier Montenbruck in Journal of geodesy, vol 89 n° 3 (March 2015)
PermalinkReducing the draconitic errors in GNSS geodetic products / C.J. Rodriguez-Solano in Journal of geodesy, vol 88 n° 6 (June 2014)
PermalinkAtmospheric water vapour sensing by means of differntial absorption spectrometry using solar and lunar radiation / Stefan Walter Münch (2014)
PermalinkPermalink