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Validating a new GNSS-based sea level instrument (CalNaGeo) at Senetosa Cape / Pascal Bonnefond in Marine geodesy, vol 45 n° 2 (March 2022)  

Public [article]  inMarine geodesy > vol 45 n° 2 (March 2022) . - pp 121 - 150 Titre : Validating a new GNSS-based sea level instrument (CalNaGeo) at Senetosa Cape Type de document : Article/Communication Auteurs : Pascal Bonnefond, Auteur ; Olivier Laurain, Auteur ; Pierre Exertier, Auteur ; et al., Auteur Année de publication : 2022 Article en page(s) : pp 121 - 150 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale [Termes IGN] altimétrie satellitaire par radar [Termes IGN] carte bathymétrique [Termes IGN] Corse [Termes IGN] étalonnage d'instrument [Termes IGN] geoïde marin [Termes IGN] hauteurs de mer [Termes IGN] instrument de géodésie [Termes IGN] marégraphe [Termes IGN] niveau de la mer [Termes IGN] positionnement par GNSS [Termes IGN] positionnement ponctuel précis [Termes IGN] surface de la mer Résumé : (auteur) The geodetic Corsica site was set up in 1998 in order to perform altimeter calibration of the TOPEX/Poseidon (T/P) mission and subsequently, Jason-1, OSTM/Jason-2, Jason-3 and more recently Sentinel-6 Michael Freilich (launched on November, 21 2020). The aim of the present study held in June 2015 is to validate a recently developed GNSS-based sea level instrument (called CalNaGeo) that is designed with the intention to map Sea Surface Heights (SSH) over large areas. This has been undertaken using the well-defined geodetic infrastructure deployed at Senetosa Cape, and involved the estimation of the stability of the waterline (and thus the instantaneous separation of a GNSS antenna from water level) as a function of the velocity at which the instrument is towed. The results show a largely linear relationship which is approximately 1 mm/(m/s) up to a maximum practical towing speed of ∼10 knots (∼5 m/s). By comparing to the existing “geoid” map, it is also demonstrated that CalNaGeo can measure a sea surface slope with a precision better than 1 mm/km (∼2.5% of the physical slope). Different processing techniques are used and compared including GNSS Precise Point Positioning (PPP, where the goal is to extend SSH mapping far from coastal GNSS reference stations) showing an agreement at the 1-2 cm level. Numéro de notice : A2022-212 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1080/01490419.2021.2013355 Date de publication en ligne : 28/12/2021 En ligne : https://doi.org/10.1080/01490419.2021.2013355 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=100046 [article]

GENESIS: Co-location of Geodetic Techniques in Space / Pacôme Delva (2022)  

Public Titre : GENESIS: Co-location of Geodetic Techniques in Space Type de document : Article/Communication Auteurs : Pacôme Delva, Auteur ; Zuheir Altamimi , Auteur ; Alejandro Blazquez, Auteur ; Mathis Blossfeld, Auteur ; Johannes Böhm , Auteur ; Pascal Bonnefond, Auteur ; et al., Auteur ; Laurent Métivier , Auteur Editeur : Ithaca [New York - Etats-Unis] : ArXiv - Université Cornell Année de publication : 2022 Projets : 1-Pas de projet / Note générale : bibliographie auteurs : Pacome Delva, Zuheir Altamimi, Alejandro Blazquez, Mathis Blossfeld, Johannes Böhm, Pascal Bonnefond, Jean-Paul Boy, Sean Bruinsma, Grzegorz Bury, Miltiadis Chatzinikos, Alexandre Couhert, Clement Courde, Rolf Dach, Veronique Dehant, Simone Dell’Agnello, Gunnar Elgered, Werner Enderle, Pierre Exertier, Susanne Glaser, Rudiger Haas, Wen Huang, Urs Hugentobler17, Adrian J¨aggi11, Ozgur Karatekin12, Frank G. Lemoine18, Christophe Le Poncin-Lafitte, Susanne Lunz, Benjamin Mannel, Flavien Mercier, Laurent Metivier, Benoıt Meyssignac, Jurgen Muller, Axel Nothnage, Felix Perosanz, Roelof Rietbroek, Markus Rothacher, Hakan Sert, Krzysztof Sosnica, Paride Testani, Javier Ventura-Traveset, Gilles Wautelet, and Radoslaw Zajde Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux [Termes IGN] co-positionnement [Termes IGN] état de l'art [Termes IGN] International Terrestrial Reference Frame [Termes IGN] mission spatiale [Termes IGN] station de mesure Résumé : (auteur) Improving and homogenizing time and space reference systems on Earth and, more directly, realizing the Terrestrial Reference Frame (TRF) with an accuracy of 1mm and a long-term stability of 0.1mm/year are relevant for many scientific and societal endeavors. The knowledge of the TRF is fundamental for Earth and navigation sciences. For instance, quantifying sea level change strongly depends on an accurate determination of the geocenter motion but also of the positions of continental and island reference stations, as well as the ground stations of tracking networks. Also, numerous applications in geophysics require absolute millimeter precision from the reference frame, as for example monitoring tectonic motion or crustal deformation for predicting natural hazards. The TRF accuracy to be achieved represents the consensus of various authorities which has enunciated geodesy requirements for Earth sciences. Today we are still far from these ambitious accuracy and stability goals for the realization of the TRF. However, a combination and co-location of all four space geodetic techniques on one satellite platform can significantly contribute to achieving these goals. This is the purpose of the GENESIS mission, proposed as a component of the FutureNAV program of the European Space Agency. The GENESIS platform will be a dynamic space geodetic observatory carrying all the geodetic instruments referenced to one another through carefully calibrated space ties. The co-location of the techniques in space will solve the inconsistencies and biases between the different geodetic techniques in order to reach the TRF accuracy and stability goals endorsed by the various international authorities and the scientific community. The purpose of this white paper is to review the state-of-the-art and explain the benefits of the GENESIS mission in Earth sciences, navigation sciences and metrology. Numéro de notice : P2022-007 Affiliation des auteurs : UMR IPGP-Géod+Ext (2020- ) Thématique : POSITIONNEMENT Nature : Preprint nature-HAL : Préprint DOI : 10.48550/arXiv.2209.15298 Date de publication en ligne : 30/09/2022 En ligne : https://doi.org/10.48550/arXiv.2209.15298 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=101792

Laser ranging data analysis for a colocation campaign of French Transportable Laser Ranging System (FTLRS) in Tahiti / Xiaoni Wang in Journal of geodesy, vol 89 n° 1 (January 2015)  

Public [article]  inJournal of geodesy > vol 89 n° 1 (January 2015) . - pp 1 - 11 Titre : Laser ranging data analysis for a colocation campaign of French Transportable Laser Ranging System (FTLRS) in Tahiti Type de document : Article/Communication Auteurs : Xiaoni Wang, Auteur ; Pascal Bonnefond, Auteur ; Pierre Exertier, Auteur ; David Coulot , Auteur ; Richard Biancale, Auteur ; Jean-Michel Lemoine, Auteur ; Jean-Claude Poyard, Auteur ; Clément Courde, Auteur ; Jean-Pierre Barriot, Auteur ; François Barlier, Auteur Année de publication : 2015 Article en page(s) : pp 1 - 11 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux [Termes IGN] analyse comparative [Termes IGN] co-positionnement [Termes IGN] données DORIS [Termes IGN] données GPS [Termes IGN] données Lageos [Termes IGN] données Starlette [Termes IGN] données TLS (télémétrie) [Termes IGN] International Terrestrial Reference Frame [Termes IGN] point de liaison (géodésie) [Termes IGN] Tahiti [Termes IGN] télémétrie laser transportable Résumé : (auteur) Tahiti is a unique geodetic site located in the south Pacific Ocean where few observatories exist nearby. The American mobile station MOBLAS-8 was installed in Tahiti in 1998, and GPS and DORIS systems were also deployed in its vicinity in order to develop this site into one of the fundamental colocated sites of the International Terrestrial Reference Frame. In order to make a new estimate of the colocation differences between the different techniques, a campaign of the French Transportable Laser Ranging System (FTLRS) was conducted in Tahiti between April and October 2011. The FTLRS was deployed close to the existing equipment. Observations for LAGEOS 1, LAGEOS 2 and Starlette were studied, and the solutions to the local ties between FTLRS, MOBLAS-8, DORIS and GPS were evaluated. Our results of the geodetic local-ties between laser stations and GPS agree well with the measurements made by the Institut National de l’Information Géographique et Forestière (IGN) during the campaign, with differences less than 2 mm in the vertical direction. The laser station range biases as a function of satellites are also presented, −3 (±2) mm for MOBLAS-8 and 3 (±3) mm for FTLRS, respectively. In addition, we investigated the role of time bias (ranging from a few hundreds of nanoseconds to one microsecond) given by the Time Transfer by Laser Link experiment, which shows a limited impact on the present SLR analysis. We also compared the coordinates of the three available techniques at Tahiti, i.e., laser, GPS and DORIS. We found the accuracy of laser solutions still needs to be improved, so that the SLR at Tahiti could contribute more effectively to the tracking of satellites and thus to the international reference frame. This study is useful in evaluating the SLR and other space techniques in order to prepare the deployment of new equipment in Tahiti in the near future. Numéro de notice : A2015-230 Affiliation des auteurs : IGN+Ext (2012-2019) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-014-0755-3 En ligne : https://doi.org/10.1007/s00190-014-0755-3 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76064 [article]

Encyclopedia of Solid Earth Geophysics. Satellite Laser Ranging / David Coulot (2011)  

Public Titre de série : Encyclopedia of Solid Earth Geophysics Titre : Satellite Laser Ranging Type de document : Chapitre/Contribution Auteurs : David Coulot , Auteur ; Florent Deleflie, Auteur ; Pascal Bonnefond, Auteur ; Pierre Exertier, Auteur ; Olivier Laurain, Auteur ; Bertrand de Saint-Jean , Auteur Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2011 Langues : Anglais (eng) Descripteur : [Termes IGN] télémétrie laser sur satellite Résumé : (auteur) [introduction] The Satellite Laser Ranging (SLR) technique was born in 1964, with the first returns obtained from the satellite Beacon Explorer B. Since the launch of the first dedicated laser satellite Starlette in 1975 (Schutz et al., 1993; Barlier and Lefebvre, 2001), SLR has provided range measurements which have been the foundations of, not only precise orbit computations, but also major geodetic products, fundamental for many Geosciences applications. [...] Numéro de notice : H2011-010 Affiliation des auteurs : LAREG+Ext (1991-2011) Autre URL associée : vers HAL Thématique : POSITIONNEMENT Nature : Chapître / contribution nature-HAL : ChOuvrScient DOI : 10.1007/978-90-481-8702-7_98 Date de publication en ligne : 27/08/2014 En ligne : https://doi.org/10.1007/978-90-481-8702-7_98 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=101484

Satellite Laser Ranging biases and terrestrial reference frame scale factor / David Coulot (2009)  

Public contenu dans Observing our changing Earth / Michael G. Sideris (2009)   Titre : Satellite Laser Ranging biases and terrestrial reference frame scale factor Type de document : Article/Communication Auteurs : David Coulot , Auteur ; Philippe Berio, Auteur ; Pascal Bonnefond, Auteur ; Pierre Exertier, Auteur ; D. Féraudy, Auteur ; Olivier Laurain, Auteur ; Florent Deleflie, Auteur Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2009 Collection : International Association of Geodesy Symposia, ISSN 0939-9585 num. 133 Conférence : IAG 2007, International Association of Geodesy General Assembly Perugia Italie Proceedings Springer Importance : pp 39 - 46 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux [Termes IGN] données TLS (télémétrie) [Termes IGN] erreur systématique [Termes IGN] facteur d'échelle [Termes IGN] International Terrestrial Reference Frame [Termes IGN] repère de référence Résumé : (auteur) We examine the impact of the strategy adopted regarding range biases on Satellite Laser Ranging data processing results. More especially, we test the stability of the weekly Terrestrial Reference Frame scale factors computed w.r.t. ITRF2000 according to the two different strategies which are studied in this paper. In the first approach, range biases are not considered in the data processing. In the second approach, we use a temporal de-correlation method to rigorously estimate all station range biases. The first approach provides weekly scale factors with a piece-wise behavior. More precisely, the time series exhibit a drift of − 2.5 ± 0.2 mm/yr between 2001.0 and 2006.0 and provide a RMS of 5.2 mm. The second approach, which makes the most physical sense, really provides regular weekly scale factors. Indeed, between 2001.0 and 2006.0, these series exhibit a drift of − 0.7 ± 0.2 mm/yr and the RMS of the whole time series is 3.7 mm. Moreover, less discontinuities are detected in the station position residual time series provided by the second approach than in those produced with the first approach. Numéro de notice : C2009-029 Affiliation des auteurs : LAREG+Ext (1991-2011) Thématique : POSITIONNEMENT Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1007/978-3-540-85426-5_5 En ligne : https://doi.org/10.1007/978-3-540-85426-5_5 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=90692

Multi-technique monitoring of ocean tide loading in Northern France / Muriel Llubes in Comptes rendus : Géoscience, vol 340 n° 6 (June 2010)  

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FTLRS Ajaccio campaigns : operations and positioning analysis over 2002/2005 / F. Pierron (2008)    

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Contribution of laser ranging to Earth's sciences / Pierre Exertier in Comptes rendus : Géoscience, vol 338 n° 14-15 (November 2006)  

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OCA/GEMINI-GRGS becoming an official ILRS analysis center / Florent Deleflie (2006)    

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Positioning of the French Transportable Laser Ranging System (FTLRS) in Corsica over the 2002 and 2005 campaigns / Bachir Gourine (2006)    

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FTLRS support to the Gavdos project: tracking and positioning / Philippe Berio (2004) 

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The role of Laser ranging for calibrating Jason-1: The Corsica tracking campaign / Pierre Exertier in Marine geodesy, vol 27 n°1-2 (January - June 2004)  

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Calibrating the Jason-1 measurement system: Initial initial results from the Corsica and harvest verification experiments / Pascal Bonnefond in Advances in space research, vol 32 n° 11 (December 2003)  

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Absolute calibration of Jason-1 and TOPEX/Poseidon altimeters in Corsica / Pascal Bonnefond in Marine geodesy, vol 26 n°3-4 (July - December 2003)  

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Leveling the sea surface using a GPS-catamaran / Pascal Bonnefond in Marine geodesy, vol 26 n°3-4 (July - December 2003)  

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