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Auteur Arturo Villiger |
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Affiner la recherche Interroger des sources externesOn the relation of GNSS phase center offsets and the terrestrial reference frame scale: a semi-analytical analysis / Oliver Montenbruck in Journal of geodesy, vol 96 n° 11 (November 2022)
Titre : On the relation of GNSS phase center offsets and the terrestrial reference frame scale: a semi-analytical analysis Type de document : Article/Communication Auteurs : Oliver Montenbruck, Auteur ; Peter Steigenberger, Auteur ; Arturo Villiger, Auteur ; Paul Rebischung Année de publication : 2022 Article en page(s) : n° 90 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] antenne GNSS
[Termes IGN] centre de phase
[Termes IGN] décalage d'horloge
[Termes IGN] hauteur (coordonnée)
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] orbitographie
[Termes IGN] phase
[Termes IGN] positionnement par GNSS
[Termes IGN] retard troposphérique zénithal
[Termes IGN] station GNSSRésumé : (auteur) Phase center offsets (PCOs) of global navigation satellites systems (GNSS) transmit antennas along the boresight axis introduce line-of-sight-dependent range changes in the modeling of GNSS observations that are strongly correlated with the estimated station heights. As a consequence, changes in the adopted PCOs impact the scale of GNSS-based realizations of the terrestrial reference frame (TRF). Vice versa, changes in the adopted TRF scale require corrections to the GNSS transmit antenna PCOs for consistent observation modeling. Early studies have determined an approximate value of α=−0.050 for the ratio of station height changes and satellite PCO changes in GPS orbit determination and phase center adjustment. However, this is mainly an empirical value and limited information is available on the actual PCO-scale relation and how it is influenced by other factors. In view of the recurring need to adjust the IGS antenna models to new ITRF scales, a semi-analytical model is developed to determine values of α for the four current GNSSs from first principles without a need for actual network data processing. Given the close coupling of satellite boresight angle and station zenith angle, satellite PCO changes are essentially compensated by a combination of station height, zenith troposphere delay, and receiver clock offset. As such, the value of α depends not only on the orbital altitude of the considered GNSS but also on the elevation-dependent distribution of GNSS observations and their weighting, as well as the elevation mask angle and the tropospheric mapping function. Based on the model, representative values of αGPS=−0.051, αGLO=−0.055, αGAL=−0.041, and αBDS-3=−0.046 are derived for GPS, GLONASS, Galileo, and BeiDou-3 at a 10∘ elevation cutoff angle. These values may vary by Δα≈0.003 depending on the specific model assumptions and data processing parameters in a precise orbit determination or precise point positioning. Likewise changes of about ±0.003 can be observed when varying the cutoff angle between 5∘ and 15∘. Numéro de notice : A2022-836 Affiliation des auteurs : UMR IPGP-Géod+Ext (2020- ) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-022-01678-x Date de publication en ligne : 09/11/2022 En ligne : https://doi.org/10.1007/s00190-022-01678-x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=102033
in Journal of geodesy > vol 96 n° 11 (November 2022) . - n° 90[article]
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 IGN] antenne Galileo
[Termes IGN] centre de phase
[Termes IGN] chambre anéchoïque
[Termes IGN] étalonnage d'instrument
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] métadonnées
[Termes IGN] positionnement par ITGB
[Termes IGN] positionnement par télémétrie laser sur satellite
[Termes IGN] réseau géodésique terrestre
[Termes IGN] robotRésumé : (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
in Journal of geodesy > vol 94 n° 9 (September 2020) . - n° 93[article]
Titre : IGS International GNSS Service technical report 2019 Type de document : Rapport Auteurs : Arturo Villiger, Éditeur scientifique ; Rolf Dach, Éditeur scientifique Editeur : Bern : Astronomical Institute Année de publication : 2020 Importance : 228 p. Format : 21 x 30 cm Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] Global Navigation Satellite SystemRésumé : (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 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 2019.Note de contenu : 1. Executive Groups
2. Analysis Centers
3. Data Centers
4. Working Groups, Pilot ProjectsNuméro de notice : 17622 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Rapport nature-HAL : Rapport DOI : 10.7892/boris.14400 En ligne : https://files.igs.org/pub/resource/pubs/2019_techreport.pdf Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=97121
Titre : IGS International GNSS Service technical report 2018 Type de document : Rapport Auteurs : Arturo Villiger, Éditeur scientifique ; Rolf Dach, Éditeur 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 IGN] Global Navigation Satellite SystemRésumé : (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 ProjectsNuméro 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 Documents numériques
en open access
IGS International GNSS Service technical report 2018Adobe Acrobat PDF
Titre : IGS International GNSS Service technical report 2017 Type de document : Rapport Auteurs : Arturo Villiger, Éditeur scientifique ; Rolf Dach, Éditeur 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 IGN] Global Navigation Satellite SystemRésumé : (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 GroupNuméro 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 ContientDocuments numériques
en open access
IGS International GNSS Service technical report 2017Adobe Acrobat PDF
