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GNSS scale determination using calibrated receiver and Galileo satellite antenna patterns / Arturo Villiger in Journal of geodesy, vol 94 n° 9 (September 2020)  

Public [article]  inJournal of geodesy > vol 94 n° 9 (September 2020) . - n° 93 Titre : GNSS scale determination using calibrated receiver and Galileo satellite antenna patterns Type de document : Article/Communication Auteurs : Arturo Villiger, Auteur ; Rolf Dach, Auteur ; Stefan Schaer, Auteur ; et al., Auteur Année de publication : 2020 Article en page(s) : n° 93 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux [Termes descripteurs IGN] antenne Galileo [Termes descripteurs IGN] centre de phase [Termes descripteurs IGN] chambre anéchoïque [Termes descripteurs IGN] étalonnage d'instrument [Termes descripteurs IGN] International Terrestrial Reference Frame [Termes descripteurs IGN] métadonnées [Termes descripteurs IGN] positionnement par ITGB [Termes descripteurs IGN] positionnement par télémétrie laser sur satellite [Termes descripteurs IGN] réseau géodésique terrestre [Termes descripteurs IGN] robot Résumé : (auteur) The reference frame of a global terrestrial network is defined by the origin, the orientation and the scale. The origin of the ITRF2014 is defined by the ILRS long-term solution, the orientation by no-net rotation conditions w.r.t. the previous reference frame (ITRF2008), and the scale by the mean values from global VLBI and SLR solution series (Altamimi et al. in J Geophys Res Solid Earth 121:6109–6131, 2016). With the release of the Galileo satellite antenna phase center offsets (PCO) w.r.t. the satellites center of mass (GSA in Galileo IOV and FOC satellite metadata, 2019) and the availability of new ground antenna calibrations for GNSS receivers, based on anechoic chamber measurements or on robot calibrations, GNSS global network solutions qualify to contribute to the scale determination of terrestrial networks, as well. Our analysis is based on global multi-GNSS solutions of the years 2017 and 2018 and may be seen as “proof of concept” for the contribution of GNSS data to the scale determination of the terrestrial reference frame. In a first step, the currently used Galileo PCO estimations (Steigenberger et al. in J Geod 90:773–785, 2016) are compared to the released PCO values, which show discrepancies on the decimeter-level. Eventually, the published Galileo PCOs are used in an experimental solution as known values. GNSS-specific PCOs are estimated, as well, for GPS and GLONASS, together with the “standard” parameters set up in global GNSS solutions. From the estimated network coordinates, a time series of daily scale parameters of the terrestrial network is extracted, which shows an offset of the order of 1 ppb (parts per billion, corresponding to a height difference of 6.4 mm on the Earth’s surface) w.r.t. to the ITRF2014 network and an annual variation with an amplitude of about 0.3 ppb. Numéro de notice : A2020-539 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-020-01417-0 date de publication en ligne : 05/09/2020 En ligne : https://doi.org/10.1007/s00190-020-01417-0 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=95739 [article]

IGS International GNSS Service technical report 2018 / Arturo Villiger (2019)    

Public Titre : IGS International GNSS Service technical report 2018 Type de document : Rapport Auteurs : Arturo Villiger, Editeur scientifique ; Rolf Dach, Editeur scientifique Editeur : Bern : Astronomical Institute Année de publication : 2019 Importance : 228 p. Format : 21 x 30 cm Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes descripteurs IGN] Global Navigation Satellite System Résumé : (Editeur) Applications of the Global Navigation Satellite Systems (GNSS) to Earth Sciences are numerous. The International GNSS Service (IGS), a voluntary federation of government agencies, universities and research institutions, combines GNSS resources and expertise to provide the highest–quality GNSS data, products, and services in order to support high–precision applications for GNSS–related research and engineering activities. This IGS Technical Report 2018 includes contributions from the IGS Governing Board, the Central Bureau, Analysis Centers, Data Centers, station and network operators, working groups, pilot projects, and others highlighting status and important activities, changes and results that took place and were achieved during 2018. This report is available in full-resolution electronic version at http://ftp.aiub.unibe.ch/users/villiger/2018_techreport.pdf. Note de contenu : 1. Executive Groups 2. Analysis Centers 3. Data Centers 4. Working Groups, Pilot Projects Numéro de notice : 17113 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Rapport DOI : 10.7892/boris.130408 En ligne : http://ftp.aiub.unibe.ch/users/villiger/2018_techreport.pdf Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=93307

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IGS International GNSS Service technical report 2017 / Arturo Villiger (2018)    

Public Titre : IGS International GNSS Service technical report 2017 Type de document : Rapport Auteurs : Arturo Villiger, Editeur scientifique ; Rolf Dach, Editeur scientifique Editeur : Bern : Astronomical Institute Année de publication : 2018 Importance : 228 p. Format : 21 x 30 cm Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes descripteurs IGN] Global Navigation Satellite System Résumé : (Editeur) Applications of the Global Navigation Satellite Systems (GNSS) to Earth Sciences are numerous. The International GNSS Service (IGS), a federation of government agencies, universities and research institutions, plays an increasingly critical role in support of GNSS–related research and engineering activities. This Technical Report includes contributions from the IGS Governing Board, the Central Bureau, Analysis Centers, Data Centers, station and network operators, working groups, pilot projects, and others highlighting status and important activities, changes and results that took place and were achieved during 2017. Note de contenu : 1. Executive Groups - Governing Board / G. Johnston - Central Bureau 2. Analysis Centers Analysis Center Coordinator, - Center for Orbit Determination in Europe (CODE) - Natural Resources Canada (NRCan) - European Space Operations Center (ESOC) - GeoForschungsZentrum (GFZ) - Geodetic Observatory Pecný (GOP), No report submitted - Centre National d’Etudes Spatiales/Collecte Localisation satellites (CNES/CLS) - Jet Propulsion Laboratory (JPL) - Massachusetts Institute of Technology (MIT) No report submitted - National Geodetic Survey (NGS) - Scripps Institution of Oceanography (SIO) No report submitted - United States Naval Observatory (USNO) - University of Wuhan (WHU) - EUREF Permanent Network (EPN) - SIRGAS 3. Data Centers - Infrastructure Committee - Crustal Dynamics Data Information System (CDDIS) - Scripps Institution of Oceanography (SIO), No report submitted - Institut National de l’Information Géographique et Forestière (IGN), No report submitted - Korean Astronomy and Space Science Institute (KASI) No report submitted 4. Working Groups, Pilot Projects - Antenna Working Group 133 - Bias and Calibration Working Group - Clock Products Working Group - Data Center Working Group - Ionosphere Working Group - Multi–GNSS Working Group - Space Vehicle Orbit Dynamics Working Group, No report submitted - Real–Time Service - Reference Frame Working Group - RINEX Working Group - Tide Gauge Benchmark Monitoring Project - Troposphere Working Group Numéro de notice : 17516 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Rapport En ligne : http://ftp://igs.org/pub/resource/pubs/2017_techreport.pdf Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=90518

Contient

• IGS International GNSS Service technical report 2017. IGS Reference frame working group technical report 2017 / Paul Rebischung (2018) 

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IGS International GNSS Service technical report 2016 / Arturo Villiger (2017)    

Public Titre : IGS International GNSS Service technical report 2016 Type de document : Rapport Auteurs : Arturo Villiger, Editeur scientifique ; Rolf Dach, Editeur scientifique Editeur : Bern : Astronomical Institute Année de publication : 2017 Importance : 209 p. Format : 21 x 30 cm Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes descripteurs IGN] Global Navigation Satellite System Résumé : (Editeur) Applications of the Global Navigation Satellite Systems (GNSS) to Earth Sciences are numerous. The International GNSS Service (IGS), a federation of government agencies, universities and research institutions, plays an increasingly critical role in support of GNSS–related research and engineering activities. This Technical Report includes contributions from the IGS Governing Board, the Central Bureau, Analysis Centers, Data Centers, station and network operators, working groups, pilot projects, and others highlighting status and important activities, changes and results that took place and were achieved during 2016. Note de contenu : 1. Executive Groups - Governing Board / G. Johnston - Central Bureau / R. Neilan, S. Fisher, G. Walia, D. Maggert, and A. Craddock 2. Analysis Centers Analysis Center Coordinator, - Center for Orbit Determination in Europe (CODE) - Natural Resources Canada (NRCan) - European Space Operations Center (ESOC) - GeoForschungsZentrum (GFZ) - Geodetic Observatory Pecný (GOP), No report submitted - Centre National d’Etudes Spatiales/Collecte Localisation satellites (CNES/CLS) - Jet Propulsion Laboratory (JPL) - Massachusetts Institute of Technology (MIT) No report submitted - National Geodetic Survey (NGS) - Scripps Institution of Oceanography (SIO) No report submitted - United States Naval Observatory (USNO) - University of Wuhan (WHU) - EUREF Permanent Network (EPN) - SIRGAS 3. Data Centers - Infrastructure Committee - Crustal Dynamics Data Information System (CDDIS) - Scripps Institution of Oceanography (SIO), No report submitted - Institut National de l’Information Géographique et Forestière (IGN), No report submitted - Korean Astronomy and Space Science Institute (KASI) No report submitted 4. Working Groups, Pilot Projects - Antenna Working Group 133 - Bias and Calibration Working Group - Clock Products Working Group - Data Center Working Group - Ionosphere Working Group - Multi–GNSS Working Group - Space Vehicle Orbit Dynamics Working Group, No report submitted - Real–Time Service - Reference Frame Working Group - RINEX Working Group - Tide Gauge Benchmark Monitoring Project - Troposphere Working Group Numéro de notice : 17515 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Rapport En ligne : http://ftp://igs.org/pub/resource/pubs/2016_techreport.pdf Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=90517

Contient

• IGS International GNSS Service technical report 2016. IGS Reference frame working group technical report 2016 / Paul Rebischung (2017) 

Documents numériques

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Improvement of the kinematic model of Switzerland (Swiss 4D 2) / Arturo Villiger (2014)  

Public Titre : Improvement of the kinematic model of Switzerland (Swiss 4D 2) Type de document : Thèse/HDR Auteurs : Arturo Villiger, Auteur Editeur : Zurich : Schweizerischen Geodatischen Kommission / Commission Géodésique Suisse Année de publication : 2014 Collection : Geodätisch-Geophysikalische Arbeiten in der Schweiz, ISSN 0257-1722 num. 90 Importance : 130 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-908440-36-9 Note générale : Bibliographie Doctoral Thesis Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale [Termes descripteurs IGN] collocation par moindres carrés [Termes descripteurs IGN] déformation de la croute terrestre [Termes descripteurs IGN] positionnement par GNSS [Termes descripteurs IGN] réseau géodésique local [Termes descripteurs IGN] Suisse [Termes descripteurs IGN] tectonique des plaques [Termes descripteurs IGN] tension Résumé : (Auteur) Switzerland is a region with relatively low seismicity compared to other lithospheric subduction zones. However, from historic earthquakes it is known that events with large magnitudes, above 6, have occurred. A major task was to extract the tectonic pattern of the velocity field based on Global navigation Satellite Systems (GNSS) campaign type data (CHTRF 2010 solution) given the fact that the noise level and local influences are within the same order of magnitude as the deformation occurring. The introduction of the adaptive least-squares collocation (ALSC) and its enhancement to determine the tectonically driven deformation field allowed to extract a reliable kinematic model for Switzerland. The final solution consists of the velocity field and its derivative, the strain rate field. Due to the relatively high density of measurement points, re-measured three or more times, the field could be retrieved from the data set. The horizontal velocities are mostly below 1 mm/yr and the uplift rates, determined from precise levelling, between 0 and 1.5 mm/yr. The deformation rates deduced amount to 25 nstrain/yr. The thin plate model allowed to estimate also the vertical strain rate which was not possible to retrieve by the collocation technique alone. This is due to the lack of missing measurements within the crust since all levelling and GNSS measurements are performed on the surface. The comparison of the strain rate field with seismological data showed a good accordance. The horizontal strain field confirms a compression of 15 nstrain/yr perpendicular to the Alpine chain. In the canton Valais seismic recordings observed extensional stress regimes. The collocation technique could reproduce the extension and retrieved a strain rate of 20 nstrain/yr. At the boundary of the study area uncertainties exists because of missing data outside Switzerland. This is a particular problem in the city of Basel, which lies at the southern end of the Upper Rheingraben. The 3-D strain rate tensor, using the thin plate model, has shown mostly similar fault plane solutions as the one obtained from earthquake analysis. The same is valid for the strain rate energy compared with the seismic energy released by earthquakes. The highest strain energy density is found in the eastern and western part of the Swiss Alps. This project has been funded by swisstopo and the Geodesy and Geodynamics Lab, ETH Zurich. The work which was carried out for the project COGEAR was financed by the Competence Center Environment and Sustainability of the ETH Domain (CCES). Note de contenu : 1 Introduction 1.1 Scope of work 1.2 Research tasks 1.3 Tectonic setting 1.4 Geodetic strain determination in Switzerland 2 Data and data analysis 2.1 Data sources 2.2 Regional effects 2.3 Local effects 2.4 Multipath 2.5 Uplift rates from GNSS and levelling 3 Block detection 3.1 Automatic block detection using a genetic algorithm 3.2 Manual block definition based on geological information 3.3 Conclusion 4 Adaptive least-squares collocation: Theory 4.1 Theory 4.2 Dilatation 4.3 Parameter estimation 4.4 Thin plate model 4.5 Strain energy density 4.6 Fault planes from strain 5 Adaptive least-squares collocation: Results 5.1 Generic example 5.2 CHTRF 2010 6 Comparison of the strain rate field with geophysical findings 6.1 Kinematic Model of Switzerland 6.2 Strain Energy 6.3 Strain rate tensor comparison 6.4 Comparison with seismic findings 6.5 Comparison with world wide models 7 Dense GNSS network for small scale tectonic analysis in the Canton of Valais 7.1 Introduction 7.2 GNSS network 8 Conclusion and outlook Numéro de notice : 15849 Affiliation des auteurs : non IGN Autre URL associée : URL ETH Zurich Thématique : POSITIONNEMENT Nature : Thèse étrangère DOI : 10.3929/ethz-a-010163325 En ligne : http://e-collection.library.ethz.ch/view/eth:8673 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=75687

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