Journal of geodesy . vol 80 n° 12Paru le : 01/12/2006 ISBN/ISSN/EAN : 0949-7714 |
[n° ou bulletin]
[n° ou bulletin]
|
Réservation
Réserver ce documentExemplaires(2)
Code-barres | Cote | Support | Localisation | Section | Disponibilité |
---|---|---|---|---|---|
266-06111 | RAB | Revue | Centre de documentation | En réserve L003 | Disponible |
266-06112 | RAB | Revue | Centre de documentation | En réserve L003 | Disponible |
Dépouillements
Ajouter le résultat dans votre panierThermal re-emission effects on GPS satellites / J. Duha in Journal of geodesy, vol 80 n° 12 (December 2006)
[article]
Titre : Thermal re-emission effects on GPS satellites Type de document : Article/Communication Auteurs : J. Duha, Auteur ; G.B. Afonso, Auteur ; et al., Auteur Année de publication : 2006 Article en page(s) : pp 665 - 674 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] albedo
[Termes IGN] émission thermique
[Termes IGN] modèle mathématique
[Termes IGN] orbitographie
[Termes IGN] perturbation orbitale
[Termes IGN] photon
[Termes IGN] rayonnement solaire
[Termes IGN] satellite GPSRésumé : (Auteur) Highly precise satellite-derived coordinates depend on accurate orbit predictions, which cannot be achieved with purely empirical models. Global positioning system (GPS) satellites undergo several periodic perturbing forces that have to be modeled and understood. In this scenario, small non-gravitational forces can no longer be neglected when the purpose of the orbital analysis is to obtain accurate results (Vilhena de Moraes 1994). Together with solar radiation pressure, thermal re-emission effects due to solar heating and Earth albedo are the two most important non-gravitational effects. While solar radiation pressure is widely understood, our knowledge about thermal re-emission effects on GPS satellites is in its infancy. Few models have been proposed in recent years and despite the interest of the scientific community, there is a lack of detailed results concerning the magnitude and the behavior of such forces. The aim of this work is to provide a thermal re-emission force model for GPS satellites, simple enough to minimize the problem of modeling a satellite of complex shape with several components on its surface, but accurate enough to provide an estimate of the magnitude and the behavior of these forces, as well as to provide some input to the present knowledge about photon thrust on GPS satellites. Some results of this work point to the fact that thermal re-emission effects are good candidates to partially explain the Y-bias for GPS satellites. Copyright Springer Numéro de notice : A2006-538 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-006-0060-x En ligne : https://doi.org/10.1007/s00190-006-0060-x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28261
in Journal of geodesy > vol 80 n° 12 (December 2006) . - pp 665 - 674[article]Réservation
Réserver ce documentExemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 266-06111 RAB Revue Centre de documentation En réserve L003 Disponible 266-06112 RAB Revue Centre de documentation En réserve L003 Disponible The ellipsoidal correction to the Stokes kernel for precise geoid determination / M. Najafi-Alamdari in Journal of geodesy, vol 80 n° 12 (December 2006)
[article]
Titre : The ellipsoidal correction to the Stokes kernel for precise geoid determination Type de document : Article/Communication Auteurs : M. Najafi-Alamdari, Auteur Année de publication : 2006 Article en page(s) : pp 675 - 689 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] anomalie de pesanteur
[Termes IGN] ellipsoïde (géodésie)
[Termes IGN] formule de Stokes
[Termes IGN] géoïde terrestre
[Termes IGN] modèle de géopotentiel
[Termes IGN] problème des valeurs limitesRésumé : (Auteur) Solving the geodetic boundary-value problem (GBVP) for the precise determination of the geoid requires proper use of the fundamental equation of physical geodesy as the boundary condition given on the geoid. The Stokes formula and kernel are the result of spherical approximation of this fundamental equation, which is a violation of the proper relation between the observed quantity (gravity anomaly) and the sought function (geoid). The violation is interpreted here as the improper formulation of the boundary condition, which implies the spherical Stokes kernel to be in error compared with the proper kernel of integral transformation. To remedy this error, two correction kernels to the Stokes kernel were derived: the first in both closed and spectral forms and the second only in spectral form. Contributions from the first correction kernel to the geoid across the globe were [-0.867 m, +1.002 m] in the low-frequency domain implied by the GRIM4-S4 purely satellite-derived geopotential model. It is a few centimeters, on average, in the high-frequency domain with some exceptions of a few meters in places of high topographical relief and sizable geological features in accordance with the EGM96 combined geopotential model. The contributions from the second correction kernel to the geoid are [-0.259 m, +0.217 m] and [-0.024 m, +0.023 m] in the low- and high-frequency domains, respectively. Copyright Springer Numéro de notice : A2006-539 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-006-0050-z En ligne : https://doi.org/10.1007/s00190-006-0050-z Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28262
in Journal of geodesy > vol 80 n° 12 (December 2006) . - pp 675 - 689[article]Réservation
Réserver ce documentExemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 266-06111 RAB Revue Centre de documentation En réserve L003 Disponible 266-06112 RAB Revue Centre de documentation En réserve L003 Disponible