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Determination of precise satellite orbits and geodetic parameters using satellite laser ranging / Krzysztof Sosnica (2015)

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Titre :	Determination of precise satellite orbits and geodetic parameters using satellite laser ranging
Type de document :	Rapport
Auteurs :	Krzysztof Sosnica, Auteur
Editeur :	Zurich : Schweizerischen Geodatischen Kommission / Commission Géodésique Suisse
Année de publication :	2015
Collection :	Geodätisch-Geophysikalische Arbeiten in der Schweiz, ISSN 0257-1722 num. 93
Importance :	257 p.
Format :	21 x 30 cm
ISBN/ISSN/EAN :	978-3-908440-38-3
Note générale :	bibliographie
Langues :	Anglais (eng)
Descripteur :	[Vedettes matières IGN] Géodésie spatiale [Termes IGN] Bernese [Termes IGN] données Ajisai [Termes IGN] données Lageos [Termes IGN] données Starlette [Termes IGN] données Stella [Termes IGN] géocentre [Termes IGN] Global Geodetic Observing System [Termes IGN] orbite basse [Termes IGN] perturbation orbitale [Termes IGN] repère de référence [Termes IGN] rotation de la Terre [Termes IGN] satellite de télémétrie [Termes IGN] télémétrie laser sur satellite
Index. décimale :	30.63 Télémétrie laser sur satellite, Télémétrie laser sur lune, VLBI
Résumé :	(auteur) The contribution of the SLR to the definition of the origin of reference frame (geocenter coordinates), the global scale (in both the geometric and dynamic sense), and low degree coefficients of the Earth's gravity field (especially the oblateness term) is essential, due to the high stability of satellite orbits and the exceptional precision of SLR observations, which are affected only by few error sources. Moreover, the SLR technique has a great contribution to a definition of the global terrestrial reference frame, estimation of the Earth rotation parameters and the time variable Earth's gravity field. The long time series of precise SLR observations allow validating many models, e.g., ocean tide models, Earth gravity field models, atmospheric pressure loading models, atmosphere and ocean induced time variable gravity field models, etc. We have shown that appropriate modeling of gravitational and non-gravitational forces is essential for orbit determination of geodetic satellites. Concerning the gravitational forces, the coefficient C20 couses the largest perturbations on LAGEOS satellites. The sensitivity of LAGEOS orbits dramatically decreases for higher degree geopotential coefficients, whereas low orbiting geodetic satellites are very sensitive to both, low- and medium-degree coefficients of the Earth's gravity field. The differences between the current ocean tide models have bigger impact on LAGEOS orbits than the differences between the current Earth gravity field models. The mean differences between solutions using various ocean tide models (max. 1.32 mm of RMS) are larger than the mean differences between orbit solutions using various Earth gravity field models (max. 1.16 mm of RMS). Insufficient quality of the S2 tide constituent causes large variations of the empirical orbit parameters of SLR geodetic satellites, as well as variations for different type satellites, e.g., GRACE. The atmospheric drag causes a secular decay of semi-major axes of low orbiting geodetic satellites, i.e., Starlette, Stella, and AJISAI, whereas the Yarkovsky and the Yarkovsky- Schach effects cause a secular decay of LAGEOS-1 and LAGEOS-2. The decay of the semi-major axis of LAGEOS-1 is smaller than the decay reported in many earlier papers due to the satellite's de-spinning effect. The decay is fiaL1 =
Note de contenu :	1 Introduction 1.1 Role of Satellite Laser Ranging in Science 1.2 Objectives and Methods 1.3 Structure 2 Satellite Geodesy 2.1 Reference Systems and Frames 2.2 Satellite Orbit Modeling 2.3 Parameter Estimation Using the Least-Squares Method 2.4 Global Navigation Satellite Systems (GNSS) 2.5 Satellite Laser Ranging 3 Gravitational Forces Acting on Geodetic Satellites 3.1 Solution Description 3.2 LAGEOS Sensitivity to Earth Gravity Field Models 3.3 LAGEOS Sensitivity to Ocean Tide Models 3.4 Discussion and Conclusions 4 Non-gravitational Forces Acting on Geodetic Satellites 4.1 Thermal effects 4.2 Earth Radiation Pressure 4.3 Atmospheric Drag 4.4 Discussion and Conclusions 5 Improving SLR Solutions 5.1 Impact of Loading Corrections on SLR Solutions 5.2 The Blue-Sky effect 5.3 Orbit Modeling of Low Orbiting Geodetic Satellites 5.4 Combined LAGEOS-LEO Solutions 5.5 Simultaneous Estimation of Gravity Field along with other Parameters 5.6 Time Variable Earth's Gravity Field From SLR 5.7 Discussion and Conclusions
Numéro de notice :	14914
Affiliation des auteurs :	non IGN
Thématique :	POSITIONNEMENT
Nature :	Rapport de recherche
DOI :	sans
En ligne :	https://www.sgc.ethz.ch/sgc-volumes/sgk-93.pdf
Format de la ressource électronique :	URL
Permalink :	https://documentation.ensg.eu/index.php?lvl=notice_display&id=76821

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
14914-01	30.63	Livre	Centre de documentation	Géodésie	Disponible

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IGN

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L'actu ! Horaires du CDOS

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2014 -2024 IGN

Centre de documentation
scientifique