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Benefits of non-tidal loading applied at distinct levels in VLBI analysis / Matthias Glomsda in Journal of geodesy, vol 94 n° 9 (September 2020)  

Public [article]  inJournal of geodesy > vol 94 n° 9 (September 2020) . - n° 90 Titre : Benefits of non-tidal loading applied at distinct levels in VLBI analysis Type de document : Article/Communication Auteurs : Matthias Glomsda, Auteur ; Mathis Blossfeld, Auteur ; Manuela Seitz, Auteur ; et al., Auteur Année de publication : 2020 Article en page(s) : n° 90 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes descripteurs IGN] données ITGB [Termes descripteurs IGN] effet de charge [Termes descripteurs IGN] interférométrie à très grande base [Termes descripteurs IGN] pesanteur hors marée [Termes descripteurs IGN] retard troposphérique [Termes descripteurs IGN] série temporelle [Termes descripteurs IGN] surcharge hydrologique [Termes descripteurs IGN] surcharge océanique [Termes descripteurs IGN] transformation de Helmert Résumé : (auteur) In the analysis of very long baseline interferometry (VLBI) observations, many geophysical models are used for correcting the theoretical signal delay. In addition to the conventional models described by Petit and Luzum (eds) (IERS Conventions, 2010), we are applying different parts of non-tidal site loading, namely the atmospheric, oceanic, and hydrological ones. To investigate their individual contributions, these parts are considered both separately and combined to a total loading. The application of the corresponding site displacements is performed at two distinct levels of the geodetic parameter estimation process (observation and normal equation level), which turn out to give very similar results in many cases. To validate our findings internally, the site displacements are provided by two different data centres: the Earth-System-Modelling group at the Deutsches GeoForschungsZentrum in Potsdam (ESMGFZ, see Dill and Dobslaw, J Geophys Res Solid Earth, 2013. https://doi.org/10.1002/jgrb.50353ISTEX)] and the International Mass Loading Service [IMLS, see Petrov (The international mass loading service, 2015)]. We show that considering non-tidal loading is actually useful for mitigating systematic effects in the VLBI results, like annual signals in the station height time series. If the sum of all non-tidal loading parts is considered, the WRMS of the station heights and baseline lengths is reduced in 80–90% of all cases, and the relative improvement is about −3.5% on average. The main differences between our chosen providers originate from hydrological loading. Numéro de notice : A2020-540 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-020-01418-z date de publication en ligne : 31/08/2020 En ligne : https://doi.org/10.1007/s00190-020-01418-z Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=95741 [article]

GipsyX/RTGx, a new tool set for space geodetic operations and research / Willy I. Bertiger in Advances in space research, vol 66 n° 3 (1 August 2020)  

Public [article]  inAdvances in space research > vol 66 n° 3 (1 August 2020) . - pp 469 - 489 Titre : GipsyX/RTGx, a new tool set for space geodetic operations and research Type de document : Article/Communication Auteurs : Willy I. Bertiger, Auteur ; Yoaz E. Bar-Sever, Auteur ; A. Dorsey, Auteur ; Bruce J. Haines, Auteur ; N.R. Harvey, Auteur ; Dan Hemberger, Auteur ; Michael B. Heflin, Auteur ; Wenwen Lu, Auteur ; Mark Miller, Auteur ; Angelyn Moore, Auteur ; Dave Murphy, Auteur ; Paul Ries, Auteur ; L.J. Romans, Auteur ; Aurore E. Sibois, Auteur ; Ant Sibthorpe, Auteur ; Bela Szilagyi, Auteur ; Michele Vallisneri, Auteur ; Pascal Willis , Auteur Année de publication : 2020 Projets : 3-projet - voir note / Article en page(s) : pp 469 - 489 Note générale : bibliographie The research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes descripteurs IGN] données DORIS [Termes descripteurs IGN] données GNSS [Termes descripteurs IGN] données ITGB [Termes descripteurs IGN] données TLS (télémétrie) [Termes descripteurs IGN] filtre de Kalman [Termes descripteurs IGN] horloge atomique [Termes descripteurs IGN] horloge du satellite [Termes descripteurs IGN] logiciel d'orbitographie [Termes descripteurs IGN] positionnement ponctuel précis [Termes descripteurs IGN] série temporelle [Termes descripteurs IGN] temps réel [Termes descripteurs IGN] traitement de données GNSS Résumé : (auteur) GipsyX/RTGx is the Jet Propulsion Laboratory’s (JPL) next generation software package for positioning, navigation, timing, and Earth science using measurements from three geodetic techniques: Global Navigation Satellite Systems (GNSS), Satellite Laser Ranging (SLR), and Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS); with Very Long Baseline Interferometry (VLBI) under development. The software facilitates combined estimation of geodetic and geophysical parameters using a Kalman filter approach on real or simulated data in both post-processing and in real-time. The estimated parameters include station coordinates and velocities, satellite orbits and clocks, Earth orientation, ionospheric and tropospheric delays. The software is also capable of full realization of a dynamic terrestrial reference through analysis and combination of time series of ground station coordinates. Applying lessons learned from its predecessors, GIPSY-OASIS and Real Time GIPSY (RTG), GipsyX/RTGx was re-designed from the ground up to offer improved precision, accuracy, usability, and operational flexibility. We present some key aspects of its new architecture, and describe some of its major applications, including Real-time orbit determination and ephemeris predictions in the U.S. Air Force Next Generation GPS Operational Control Segment (OCX), as well as in JPL’s Global Differential GPS (GDGPS) System, supporting User Range Error (URE) of 5 cm RMS; precision post-processing GNSS orbit determination, including JPL’s contributions to the International GNSS Service (IGS) with URE in the 2 cm RMS range; Precise point positioning (PPP) with ambiguity resolution, both statically and kinematically, for geodetic applications with 2 mm horizontal, and 6.5 mm vertical repeatability for static positioning; Operational orbit and clock determination for Low Earth Orbiting (LEO) satellites, such as NASA’s Gravity Recovery and Climate Experiment (GRACE) mission with GRACE relative clock alignment at the 20 ps level; calibration of radio occultation data from LEO satellites for weather forecasting and climate studies; Satellite Laser Ranging (SLR) to GNSS and LEO satellites, DORIS-based and multi-technique orbit determination for LEO; production of terrestrial reference frames and Earth rotation parameters in support of JPL’s contribution to the International Terrestrial Reference Frame (ITRF). Numéro de notice : A2020-575 Affiliation des auteurs : UMR IPGP-Géod+Ext (2020- ) Thématique : INFORMATIQUE/POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.asr.2020.04.015 date de publication en ligne : 22/04/2020 En ligne : https://doi.org/10.1016/j.asr.2020.04.015 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=96369 [article]

Geodetic VLBI for precise orbit determination of Earth satellites: a simulation study / Grzegorz Klopotek in Journal of geodesy, vol 94 n° 6 (June 2020)  

Public [article]  inJournal of geodesy > vol 94 n° 6 (June 2020) Titre : Geodetic VLBI for precise orbit determination of Earth satellites: a simulation study Type de document : Article/Communication Auteurs : Grzegorz Klopotek, Auteur ; Thomas Hobiger, Auteur ; Rüdiger Haas, Auteur ; Toshimichi Otsubo, Auteur Année de publication : 2020 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes descripteurs IGN] constellation GNSS [Termes descripteurs IGN] données Galileo [Termes descripteurs IGN] données Lageos [Termes descripteurs IGN] données VGOS [Termes descripteurs IGN] géocentre [Termes descripteurs IGN] interférométrie à très grande base [Termes descripteurs IGN] méthode de Monte-Carlo [Termes descripteurs IGN] orbitographie [Termes descripteurs IGN] paramètres d'orientation de la Terre [Termes descripteurs IGN] quasar [Termes descripteurs IGN] rotation de la Terre Résumé : (auteur) Recent efforts of tracking low Earth orbit and medium Earth orbit (MEO) satellites using geodetic very long baseline interferometry (VLBI) raise questions on the potential of this novel observation concept for space geodesy. Therefore, we carry out extensive Monte Carlo simulations in order to investigate the feasibility of geodetic VLBI for precise orbit determination (POD) of MEO satellites and assess the impact of quality and quantity of satellite observations on the derived geodetic parameters. The MEO satellites are represented in our study by LAGEOS-1/-2 and a set of Galileo satellites. The concept is studied on the basis of 3-day solutions in which satellite observations are included into real schedules of the continuous geodetic VLBI campaign 2017 (CONT17) as well as simulated schedules concerning the next-generation VLBI system, known as the VLBI Global Observing System (VGOS). Our results indicate that geodetic VLBI can perform on a comparable level as other space-geodetic techniques concerning POD of MEO satellites. For an assumed satellite observation precision better than 14.1 mm (47 ps), an average 3D orbit precision of 2.0 cm and 6.3 cm is found for schedules including LAGEOS-1/-2 and Galileo satellites, respectively. Moreover, geocenter offsets, which were so far out of scope for the geodetic VLBI analysis, are close to the detection limit for the simulations concerning VGOS observations of Galileo satellites, with the potential to further enhance the results. Concerning the estimated satellite orbits, VGOS leads to an average precision improvement of 80% with respect to legacy VLBI. In absolute terms and for satellite observation precision of 14.1 mm (47 ps), this corresponds to an average value of 17 mm and 7 mm concerning the 3D orbit scatter and precision of geocenter components, respectively. As shown in this study, a poor satellite geometry can degrade the derived Earth rotation parameters and VLBI station positions, compared to the quasar-only reference schedules. Therefore, careful scheduling of both quasar and satellite observations should be performed in order to fully benefit from this novel observation concept. Numéro de notice : A2020-342 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-020-01381-9 date de publication en ligne : 11/06/2020 En ligne : https://doi.org/10.1007/s00190-020-01381-9 Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=95221 [article]

Combinatorial optimization applied to VLBI scheduling / A. Corbin in Journal of geodesy, vol 94 n°2 (February 2020)  

Public [article]  inJournal of geodesy > vol 94 n°2 (February 2020) Titre : Combinatorial optimization applied to VLBI scheduling Type de document : Article/Communication Auteurs : A. Corbin, Auteur ; B. Niedermann, Auteur ; Axel Nothnagel, Auteur ; et al., Auteur Année de publication : 2020 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes descripteurs IGN] analyse combinatoire (maths) [Termes descripteurs IGN] données VGOS [Termes descripteurs IGN] interférométrie à très grande base [Termes descripteurs IGN] positionnement par ITGB [Termes descripteurs IGN] programmation linéaire [Termes descripteurs IGN] retard troposphérique zénithal [Termes descripteurs IGN] station VLBI [Termes descripteurs IGN] téléscope [Termes descripteurs IGN] temps universel coordonné Résumé : (auteur) Due to the advent of powerful solvers, today linear programming has seen many applications in production and routing. In this publication, we present mixed-integer linear programming as applied to scheduling geodetic very-long-baseline interferometry (VLBI) observations. The approach uses combinatorial optimization and formulates the scheduling task as a mixed-integer linear program. Within this new method, the schedule is considered as an entity containing all possible observations of an observing session at the same time, leading to a global optimum. In our example, the optimum is found by maximizing the sky coverage score. The sky coverage score is computed by a hierarchical partitioning of the local sky above each telescope into a number of cells. Each cell including at least one observation adds a certain gain to the score. The method is computationally expensive and this publication may be ahead of its time for large networks and large numbers of VLBI observations. However, considering that developments of solvers for combinatorial optimization are progressing rapidly and that computers increase in performance, the usefulness of this approach may come up again in some distant future. Nevertheless, readers may be prompted to look into these optimization methods already today seeing that they are available also in the geodetic literature. The validity of the concept and the applicability of the logic are demonstrated by evaluating test schedules for five 1-h, single-baseline Intensive VLBI sessions. Compared to schedules that were produced with the scheduling software sked, the number of observations per session is increased on average by three observations and the simulated precision of UT1-UTC is improved in four out of five cases (6 μs average improvement in quadrature). Moreover, a simplified and thus much faster version of the mixed-integer linear program has been developed for modern VLBI Global Observing System telescopes. Numéro de notice : A2020-153 Affiliation des auteurs : non IGN Thématique : MATHEMATIQUE/POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-020-01348-w date de publication en ligne : 29/01/2020 En ligne : https://doi.org/10.1007/s00190-020-01348-w Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=94786 [article]

Systematic errors in SLR data and their impact on the ILRS products / Vincenza Luceri in Journal of geodesy, vol 93 n°11 (November 2019)  

Public [article]  inJournal of geodesy > vol 93 n°11 (November 2019) Titre : Systematic errors in SLR data and their impact on the ILRS products Type de document : Article/Communication Auteurs : Vincenza Luceri, Auteur ; M. Pirri, Auteur ; J. Rodriguez, Auteur ; et al., Auteur Année de publication : 2019 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes descripteurs IGN] acquisition de données [Termes descripteurs IGN] contrôle qualité [Termes descripteurs IGN] données TLS (télémétrie) [Termes descripteurs IGN] erreur systématique [Termes descripteurs IGN] interférométrie à très grande base [Termes descripteurs IGN] International Terrestrial Reference Frame [Termes descripteurs IGN] qualité des données [Termes descripteurs IGN] rétroréflecteur [Termes descripteurs IGN] station TLS (télémétrie) [Termes descripteurs IGN] télémétrie laser sur satellite Résumé : (auteur) The satellite laser ranging (SLR) technique has the potential to make extremely precise measurements to retroreflector arrays on orbiting satellites, with normal point range precision at a level of 1 mm for the core tracking stations of the International Laser Ranging Service (ILRS). The main limitation to achieving a similar level of range accuracy is the presence of uncorrected systematic errors, which can be attributed to various sources at the stations (e.g., calibration and/or synchronization procedures, hardware malfunctioning, nonlinearities in the time-of-flight measurement devices), as well as to modeling deficiencies, especially in the ability to refer the range measurements to the center of mass of the spacecraft. The ILRS has always been active in adopting rigorous procedures to detect and remove systematic errors from the data: a group of ILRS analysis centers routinely performs data quality control a few hours after data acquisition; the ILRS Analysis Standing Committee (ASC) is in charge of long-term monitoring and characterization of systematic errors in the observations used for the ILRS products; a Quality Control Board was established in 2015 to address SLR systems’ biases and other data issues. In particular, the ASC is devoting efforts on an investigation of an alternative approach whereby a simultaneous estimation of site coordinates and range biases provides station positions that are in principle free of systematic errors. Results using this approach have shown a significant impact on the realization of the TRF, in particular by reducing the existing scale offset between the VLBI and SLR solutions and reaching a closer agreement with the ITRF2014 scale. This paper outlines the work that continues to be done to improve these products and in particular focuses on new research to evaluate rigorously any impact on the strength of coordinate solutions and geophysical inferences when systematic range errors are determined simultaneously with reference frame parameters. Future procedures for handling systematic errors will be informed by the outcome of the current investigations. Numéro de notice : A2019-612 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-019-01319-w date de publication en ligne : 19/11/2019 En ligne : https://doi.org/10.1007/s00190-019-01319-w Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=94800 [article]

Troposphere delay modeling with horizontal gradients for satellite laser ranging / M. Drożdżewski in Journal of geodesy, vol 93 n°10 (October 2019)  

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Modeling the VLBI delay for Earth satellites / Frédéric Jaron in Journal of geodesy, vol 93 n°7 (July 2019)  

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Least-squares cross-wavelet analysis and its applications in geophysical time series / Ebrahim Ghaderpour in Journal of geodesy, vol 92 n° 10 (October 2018)  

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Geodetic VLBI with an artificial radio source on the Moon : a simulation study / Grzegorz Klopotek in Journal of geodesy, vol 92 n° 5 (May 2018)  

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Basic Earth's Parameters as estimated from VLBI observations / Ping Zhu in Geodesy and Geodynamics, vol 8 n° 6 (November 2017)  

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Application of ray-traced tropospheric slant delays to geodetic VLBI analysis / Armin Hofmeister in Journal of geodesy, vol 91 n° 8 (August 2017)  

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A global terrestrial reference frame from simulated VLBI and SLR data in view of GGOS / Susanne Glaser in Journal of geodesy, vol 91 n° 7 (July 2017)  

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Improving the modeling of the atmospheric delay in the data analysis of the Intensive VLBI sessions and the impact on the UT1 estimates / Tobias Nilsson in Journal of geodesy, vol 91 n° 7 (July 2017)  

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The extension of the parametrization of the radio source coordinates in geodetic VLBI and its impact on the time series analysis / Maria Karbon in Journal of geodesy, vol 91 n° 7 (July 2017)  

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On the consistency of the current conventional EOP series and the celestial and terrestrial reference frames / Santiago Belda in Journal of geodesy, vol 91 n° 2 (February 2017)  

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IERS annual report 2015 / Wolfgang R. Dick (2017)  

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Interferometry and Synthesis in Radio Astronomy / A.R. Thompson (2017)  

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Complex demodulation in monitoring earth rotation by VLBI: testing the algorithm by analysis of long periodic EOP components / Agata Wielgosz in Artificial satellites, vol 51 n° 4 (December 2016)  

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Determination of a terrestrial reference frame via Kalman filtering of very long baseline interferometry data / Benedikt Soja in Journal of geodesy, vol 90 n° 12 (December 2016)  

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Testing impact of the strategy of VLBI data analysis on the estimation of Earth Orientation Parameters and station coordinates / Agata Wielgosz in Reports on geodesy and geoinformatics, vol 101 (June 2016)  

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Caractérisation des signaux et des bruits des séries temporelles du géocentre et des paramètres de rotation de la Terre (EOP) / Bachir Gourine in Bulletin des sciences géographiques, n° 30 (2015 - 2016)

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Co-location of geodetic observation techniques in space / Benjamin Männel (2016)  

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The Fresnel–Fizeau effect and the atmospheric time delay in geodetic VLBI / S. M. Kopeikin in Journal of geodesy, vol 89 n° 8 (August 2015)  

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Determination of the local tie vector between the VLBI and GNSS reference points at Onsala using GPS measurements / Tong Ning in Journal of geodesy, vol 89 n° 7 (July 2015)  

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IERS annual report 2014 / Wolfgang R. Dick (2015)  

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Continental hydrology loading observed by VLBI measurements / David Eriksson in Journal of geodesy, vol 88 n° 7 (July 2014)  

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Earth orientation parameters estimated from VLBI during the CONT11 campaign / Tobias Nilsson in Journal of geodesy, vol 88 n° 5 (May 2014)  

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New VLBI2010 scheduling strategies and implications on the terrestrial reference frames / Jing Sun in Journal of geodesy, vol 88 n° 5 (May 2014)  

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IERS annual report 2012 / Wolfgang R. Dick (2014)  

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IERS annual report 2013 / Wolfgang R. Dick (2014)  

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International VLBI Service for Geodesy and Astrometry 2013 annual report / Karen D. Baver (2014)  

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Non-linear station motions in epoch and multi-year reference frames / Mathis Blossfeld in Journal of geodesy, vol 88 n° 1 (January 2014)  

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Quantifying the correlation between the MEI and LOD variations by decomposing LOD with singular spectrum analysis / Karine Le Bail (2014)  

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Recherche des sous-réseaux d’antennes VLBI et de radio‐sources extra‐galactiques par algorithmes génétiques / Serge Nyoka (2014) 

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Troposphere delays from space geodetic techniques, water vapor radiometers, and numerical weather models over a series of continuous VLBI campaigns / Kamil Teke in Journal of geodesy, vol 87 n° 10-12 (October - December 2013)  

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Automated and continual determination of radio telescope reference points with sub-mm accuracy: results from a campaign at the Onsala Space Observatory / Michael Lösler in Journal of geodesy, vol 87 n° 8 (August 2013)  

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Impact of seasonal station motions on VLBI UT1 intensives results / Zinovy Malkin in Journal of geodesy, vol 87 n° 6 (June 2013)  

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Earth System Mass Transport Mission (e.motion): A Concept for Future Earth Gravity Field Measurements from Space / Isabelle Panet in Surveys in Geophysics, vol 34 n° 2 (March 2013)  

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IERS annual report 2010 / Wolfgang R. Dick (2013)  

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IERS annual report 2011 / Wolfgang R. Dick (2013)  

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Sciences of geodesy, vol 2. Innovations and future developments / Guochang Xu (2013)

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Effects on the geodetic-VLBI observables due to polarization leakage in the receivers / A. Roy (2012) 

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IERS annual report 2008-2009 / Wolfgang R. Dick (2012)  

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Robust determination of station positions and Earth orientation parameters by VLBI intra-technique combination / S. Böckmann (2012) 

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Towards a combination of space-geodetic measurements / Arnaud Pollet (2012)  

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n° 32 - 01/11/2011 - Proceedings of the 10th NICT IVS TDC symposium, Kashima, February 23, 2011 (Bulletin de IVS NICT Technology Development Center News) / National institute of information & comm. techno. nict  

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VLBI2010 and GGOS / Shinobu Kurihara in IVS NICT Technology Development Center News, n° 32 (01/11/2011)

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High-resolution atmospheric angular momentum functions related to Earth rotation parameters during CONT08 / D. Gambis in Journal of geodesy, vol 85 n° 7 (July 2011)  

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Multi-technique comparison of troposphere zenith delays and gradients during CONT08 / Kamil Teke in Journal of geodesy, vol 85 n° 7 (July 2011)  

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Le repère céleste de références : définition et amélioration / Anonyme in Géomatique expert, n° 81 (01/07/2011)

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VLBI-derived troposphere parameters during CONT08 / Robert Heinkelmann in Journal of geodesy, vol 85 n° 7 (July 2011)  

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vol 85 n° 7 - July 2011 - CONT08 -continuous geodetic VLBI campaign 2008 August 12-26 2008 (Bulletin de Journal of geodesy) / Axel Nothnagel  

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Combinaison multi-techniques au niveau des observations : Quels avantages ? / Arnaud Pollet in Bulletin d'information scientifique et technique de l'IGN, n° 77 (avril 2011)

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Impact of a priori gradients on VLBI-derived terrestrial reference frames / Johannes Böhm (29/03/2011) 

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Combinaison de techniques de géodésie spatiale / Arnaud Pollet (2011)  

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International VLBI Service for Geodesy and Astrometry 2010 annual report / Dirk Behrend (2011)  

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Sub-daily parameter estimation in VLBI data analysis / Kamil Teke (2011) 

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The crustal dynamics data information system: a resource to support scientific analysis using space geodesy / Carey E. Noll in Advances in space research, vol 45 n° 12 (15/06/2010)

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Asymmetric tropospheric delays from numerical weather models for UT1 determination from VLBI Intensive sessions on the baseline Wettzell–Tsukuba / Johannes Böhm in Journal of geodesy, vol 84 n° 5 (May 2010)  

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International VLBI Service for Geodesy and Astrometry 2009 annual report / Dirk Behrend (2010)  

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Space-time reference systems for monitoring global change and for precise navigation / Axel Nothnagel (2010)

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Local effects of redundant terrestrial and GPS-based tie vectors in ITRF-like combinations / Claudio Abbondanza in Journal of geodesy, vol 83 n° 11 (November 2009)  

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Local effects of redundant terrestrial and GPS-based tie vectors in ITRF-like combinations / Claudio Abbondanza in Journal of geodesy, vol 83 n° 11 (November 2009)  

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IERS annual report 2007 / Wolfgang R. Dick (2009)  

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International VLBI Service for Geodesy and Astrometry 2008 annual report / Dirk Behrend (2009)  

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The impact of errors in polar motion and nutation on UT1 determinations from VLBI Intensive observations / Axel Nothnagel in Journal of geodesy, vol 82 n° 12 (December 2008)

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On the accuracy assessment of celestial reference frame realizations / Z. Malkin in Journal of geodesy, vol 82 n° 6 (June 2008)

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IERS annual report 2006 / Wolfgang R. Dick (2008)  

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International VLBI Service for Geodesy and Astrometry 2007 annual report / Dirk Behrend (2008)  

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Local ties, VLBI-GPS eccentricities and combination of geodetic reference frames / Claudio Abbondanza (2008) 

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Combined Earth orientation parameters based on homogeneous and continuous VLBI and GPS data / Daniela Thaller in Journal of geodesy, vol 81 n° 6-8 (June - August 2007)

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Indirect approach to invariant point determination for SLR and VLBI systems: an assessment / John Dawson in Journal of geodesy, vol 81 n° 6-8 (June - August 2007)

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The impact of radio source structure on European geodetic VLBI measurements / V. Tornatore in Journal of geodesy, vol 81 n° 6-8 (June - August 2007)

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A comparison of GPS, VLBI and model estimates of ocean tide loading displacements / I.D. Thomas in Journal of geodesy, vol 81 n° 5 (May 2007)

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International VLBI Service for Geodesy and Astrometry 2006 annual report / Dirk Behrend (2007)  

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Proccedings of the 18th European VLBI for geodesy and astrometry working meeting, Vienna, 12-13 April 2007 / Johannes Böhm (2007)

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Space geodetic techniques and the canadian spatial reference system evolution, status and possibilities / P. Heroux in Geomatica, vol 60 n° 2 (June 2006)

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Global combination from space geodetic techniques / D. Gambis (2006) 

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IERS annual report 2005 / Wolfgang R. Dick (2006)  

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International VLBI Service for Geodesy and Astrometry 2005 annual report / Dirk Behrend (2006)  

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Is there utility in rigorous combinations of VLBI and GPS Earth orientation parameters? / Jim Ray in Journal of geodesy, vol 79 n° 9 (December 2005)  

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Evaluation of co-location ties relating the VLBI and GPS reference frames / Jim Ray in Journal of geodesy, vol 79 n° 4-5 (July 2005)  

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IERS annual report 2003 / Wolfgang R. Dick (2005)  

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IERS annual report 2004 / Wolfgang R. Dick (2005)  

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International VLBI Service for Geodesy and Astrometry 2004 annual report / Dirk Behrend (2005)  

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La géodésie française et mondiale : une évolution considérable en 25 ans / Michel Kasser in XYZ, n° 100 (septembre - novembre 2004)

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Das stochastische Modell bei der VLBI-Auswertung / V. Tesmer (2004)

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Ein eingebettetes ExpertSystem zur Automatisierung der VLBI-Auswertung / W. Schwegmann (2004)

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International VLBI Service for Geodesy and Astrometry 2003 annual report / Nancy R. Vandenberg (2004)  

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Troposphärische Laufzeitverzögerungen in der VLBI / Johannes Böhm (2004) 

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IERS annual report 2002 / Wolfgang R. Dick (2003)  

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International VLBI Service for Geodesy and Astrometry 2002 annual report / N.R. Vandenberg (2003)  

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Satellite geodesy : foundations, methods and applications / Günter Seeber (2003)

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New trends for the realization of the international terrestrial reference system / Zuheir Altamimi in Advances in space research, vol 30 n° 2 (July 2002)  

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First precise results of VLBI observation of the baseline in Antarctic plate / Y. Fukuzaki in Bulletin of the Geographical survey institute, vol 48 (March 2002)

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General meeting proceedings [of] International VLBI Service for Geodesy and Astrometry / N.R. Vandenberg (2002)

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La géodésie / Jean-Louis Le Mouël (2002)

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IERS annual report 2001 / Wolfgang R. Dick (2002)  

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International VLBI Service for Geodesy and Astrometry 2001 annual report / N.R. Vandenberg (2002)  

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Vortrage beim 4. DFG-Rundgesprach im Rahmen des Forschungsvorhabens "Rotation der Erde" zum Thema "Wechselwirkungen im System Erde", Hollenstein/Wettzell, 8-9 Marz 2001 / Harald Schuh (2002)

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Geodesy / Wolfgang Torge (2001)

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IERS annual report 2000 / Wolfgang R. Dick (2001)  

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Participation à l'analyse des séries temporelles du système international de référence terrestre ITRS / G. Moujally (2001)

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Preliminary analysis of the ITRF2000 / Claude Boucher (01/10/2000)

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International VLBI Service for Geodesy and Astrometry General meeting, 21 - 24 février 2000, Kötzting, Allemagne / Nancy R. Vandenberg (2000)  

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Journées 2000 Systèmes de référence spatio-temporels, J 2000 / Nicole Capitaine (2000)

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Spatial reference systems for Europe / Claude Luzet (2000)

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Stabilité du repère de référence extragalactique / Karine Le Bail (2000)

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The impact of El Nino and other low-frequency signals on Earth rotation and global Earth systems parameters / D.A. Salstein (1999)

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On the Unification of Indonesian Local Height Systems / Khafid (1998)

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Report on the Second International Meeting of the Asia-Pacific Space Geodynamics Program / Michael Pearlman (1998)

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Results and analysis of the ITRF96 / Claude Boucher (1998)

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Advanced space technology in geodesy / Reiner Rummel (1997)

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Definition and realization of the International Celestial Reference System by VLBI astrometry of extragalactic objects / C. Ma (1997)

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Satellitengeodäsie und Langbasis-Interferometrie auf der Fundamentalstation Wettzell / K.H. Ilk (1997)

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1996 Analysis center workshop proceedings, March 19-21, 1996 / Ruth E. Neilan (1996)

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Analyse de repères célestes VLBI au moyen des harmoniques vectorielles / X. Oviedo (1996)

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Analyses préalables à l'ITRF 94 / Patrick Sillard (1996)

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Cours de géodésie spatiale / Françoise Duquenne (1996)

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Kilometric baseline space interferometry / Centre national d'études spatiales (1996)

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Report on the symposium of the IAG Subcommission for the European Reference Frame (EUREF) & Reports of the EUREF Technical Working Group, EUREF publication n° 5 / Erich Gubler (1996)

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The Geodetic Antarctic Project GAP95. German contributions to the SCAR 95 Epoch campaign / R. Dietrich (1996)

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Untersuchungen zu Erddeformationsmodellen für die Auswertung von geodätischen VLBI-Messungen / Rüdiger Haas (1996)

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Contributions in dynamics of the solid Earth and other planets / American Geophysical Union (1995)

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Earth orientation, reference frames and atmospheric excitation functions submitted for the 1994 IERS annual report / Pierre Charlot (1995)

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IERS annual report 1994 / L. Castrique (1995)

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ITRF Workshop / Claude Boucher (1995)

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Space geodesy techniques / R.T.K. Jaldehag (1995)

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Detection of atmospheric pressure loading using very long baseline interferometry measurements / T.M. Vandam in Journal of geophysical research : Solid Earth, vol 99 n° 3 (10/03/1994)

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Earth orientation, references frames and atmospheric excitation functions submitted for the 1993 IERS annual report / Pierre Charlot (1994)

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IERS annual report 1993 / Martine Feissel-Vernier (1994)

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Introduction à la géodésie spatiale, 2. 2ème partie DEA Astronomie fondamentale, mécanique céleste et géodésie / Pascal Willis (1994)

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NASA space geodesy program, GSFC data analysis 1993 / C. Ma (1994)

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Observations VLBI des pulsars millisecondes pour le raccordement des systèmes de référence célestes et la stabilité des échelles de temps / Gérard Petit (1994)

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Optimierung von Beobachtungsplänen in der Langbasisinterferometrie (VLBI) / H. Steufmehl (1994)

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Proceedings of the eighth international symposium on recent crustal movements (CRCM'93) / R. Shichi (1994)

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Results and analysis of the ITRF93 / Zuheir Altamimi (1994)

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Results from the search'92 campaign / J.O. Dickey (1994)

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Wegener 1994, Sixth [6th] general assembly meeting / International union of geodesy and geophysics (1994)

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Compte rendu de Congrès International Workshop for Reference Frame establishment and Technical development in Space Geodesy, IRIS '93 [International Radio Interferometric Surveying], Communications Research Laboratory / Zuheir Altamimi (1993)

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Earth orientation, reference frames and atmospheric excitation functions submitted for the 1992 IERS annual report / Pierre Charlot (1993)

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Einflüsse der Quellenstruktur in der Praxis der geodätischen VLBI / G. Zeppenfeld (1993)

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IERS annual report 1992 / Martine Feissel-Vernier (1993)

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IRIS'93 Tokyo / Geodetic society of Japan (1993)

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ITRF 92 and its associated velocity field / Claude Boucher (1993)

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Journées Luxembourgeoises de Géodynamique / C. Poitevin (1993)

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NASA space geodesy program GSFC data analysis 1992 / J.W. Ryan (1993)

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Proceedings of the 1993 IGS (International GPS Service for Geodynamics) workshop / Gerhard Beutler (1993)

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Proceedings of the 9th working meeting on European VLBI for Geodesy and Astrometry / J. Campbell (1993)

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Le système de référence terrestre de l'IERS / Zuheir Altamimi (01/06/1992)

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Geophysical surveying of the Western Mediterranean Basin / Gérard Petit (01/05/1992)

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The EUREF Terrestrial Reference System and its first realizations / Claude Boucher (04/03/1992)

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20ème assemblée générale de l'UGGI, symposium de l'UGGI et de l'AIG / Serge Botton (1992)

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Data analysis of geodetic VLBI organized by the communications research laboratory / T. Kondo (1992)

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Earth orientation, reference frames and atmospheric excitation functions submitted for the 1991 IERS annual report / Pierre Charlot (1992)

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A feasibility study of space VLBI for geodesy and geodynamics / M.N. Kulkarni (1992)

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IERS annual report 1991 / L. Castrique (1992)

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Introduction à la géodésie spatiale : Méthodes modernes en positionnement géodésique, mai 1991 / Pascal Willis (1992)

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ITRF 91 and its associated velocity field / Claude Boucher (1992)

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Orientation de la terre par mesure VLBI / A.M. Gontier (1992)

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Proceedings of the symposium refraction of transatmospheric signals in geodesy / J.C. DE Munck (1992)

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Propositions de recherches pour l'année 1993 / François Barlier (1992)

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The orientation of the planet Earth as observed by modern space techniques / Martine Feissel-Vernier (1992)

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Traitement de la campagne européenne de VLBI mobile 1989 / Noamen Rebaï (1992)

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Variations of short periodical oscillations of polar motion with periods ranging from 10-140 days / B. Kolaczek (1992)

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A parametrized solid Earth tide model and ocean tide loading effects for global geodetic baseline measurements / H. Scherneck in Geophysical journal international, vol 106 n° 3 (September 1991)  

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Preliminary results of the 1989 mobile VLBI European Campaign / Noamen Rebaï (13/06/1991)

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Analyse von Lasermessungen zum Mond im Rahmen einer post-Newton'schen Theorie / J. Muller (1991)

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Annual report for 1990 International Earth Rotation Service (IERS), 1. Annual report / International Earth Rotation and Reference Systems Service IERS (1991)

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Annual report for 1990 International Earth Rotation Service (IERS), 2. Earth orientation and reference frame determinations, atmospheric excitation functions, up to 1990, annex to the IERS annual report for 1990 / International Earth Rotation and Reference Systems Service IERS (1991)

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Compte-rendu de congrès, IERS Workshop1991 / Pascal Willis (1991)

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Crustal dynamics principal investigators' working group / Pascal Willis (1991)

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Proceedings of the AUG Chapman conference on geodetic VLBI / William E. Carter (1991)

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Proceedings of the working meeting on European VLBI for geodesy and astrometry / Survey department of rijkwaterst (1991)

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Radiointerferometrische Beobachtungen zur Bestimmung der Polbewegung unter Benutzung langer Nord-Süd-Basislinien / Axel Nothnagel (1991)

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Solid Earth science in the 1990s, 1. Volume 1 Program plan / National Aeronautics and Space Administration NASA (1991)

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Solid Earth science in the 1990s, 2. Volume 2 Panel reports / National Aeronautics and Space Administration NASA (1991)

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Solid Earth science in the 1990s, 3. Volume 3 Measurement techniques and technology / National Aeronautics and Space Administration NASA (1991)

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The IERS extragalactic celestial reference frame and its tie with Hipparcos / E.F. Arias (1991)

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Annual report for 1989 International Earth Rotation Service (IERS), 2. Earth orientation and reference frame determinations, atmospheric excitation functions, up to 1989, annex to the IERS annual report for 1989 / International Earth Rotation and Reference Systems Service IERS (1990)

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Choix des sites d'observations par VLBI mobile et GPS en méditerranée occidentale (campagne 1989-1990) / Noamen Rebaï (1990)

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Compte-rendu d'activité du GRGS pour l'année 1989 / Claude Boucher (1990)

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Earth rotation and coordinate reference frames, IAG symposium, Edinburgh, 1989 / Claude Boucher (1990)

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Estimability of geodetic parameters from space VLBI observables / J. Ádám (1990)

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Journées 1990 Systèmes de référence spatio-temporels, Colloque André Danjon / Nicole Capitaine (1990)

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A method to enhance the cross correlation of millisecond pulsars VLBI data observations of PSR1937+214 / J.F. Lestrade (1990)

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Physics of the Earth and the solar system / B. Bertotti (1990)

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Satellitengeodäsie / Monique Schneider (1990)

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Evolution du réseau géodésique national / Jean-Jacques Levallois (01/12/1989)

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First direct geodetic link between Europe, Africa and south-America with a multi station VLBI array / Gérard Petit in Bulletin géodésique, vol 63 n° 4 (décembre 1989)

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Annual report for 1988 International Earth Rotation Service (IERS), 2. Earth orientation and reference frame determinations, atmospheric excitation functions, up to 1988, annex to the IERS annual report for 1988 / International Earth Rotation and Reference Systems Service IERS (1989)

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Compte-rendu d'activité du GRGS pour l'année 1988 / Claude Boucher (1989)

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Crustal dynamics project data analysis 1988 / C. Ma (1989)

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Journées 1989 Systèmes de référence spatio-temporels, Astrométrie et relativité / Nicole Capitaine (1989)

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Measurement techniques and technology / Coofont program planning group (1989)

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On principles, methods and recent advances in studies towards a GPS-based control system for geodesy and geodynamics / D. Delikaraoglou (1989)

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Proceedings of the 7th working meeting on European VLBI for Geodesy and Astrometry / Antonio Rius (1989)

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Rezente Krustenbewegungen Seminar, 8.-9. Juni 1989 / N. Kersting (1989)

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Structure des sources radio extragalactiques dans les observations VLBI d'astrométrie et de géodynamique / Pierre Charlot (1989)

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La distance la plus précise jamais calculée par l'IGN / Gérard Petit in Bulletin d'information de l'Institut géographique national, n° 56 (décembre 1988)

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