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Auteur Felix Perozans |
Documents disponibles écrits par cet auteur (2)
Ajouter le résultat dans votre panier Affiner la recherche Interroger des sources externesGRGS numerical simulations for a GRASP-like mission: A way to reach the GGOS goal for terrestrial reference frame / Arnaud Pollet in Journal of geodesy, vol 97 n° 5 (May 2023)
Titre : GRGS numerical simulations for a GRASP-like mission: A way to reach the GGOS goal for terrestrial reference frame Type de document : Article/Communication Auteurs : Arnaud Pollet Année de publication : 2023 Article en page(s) : n° 45 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] International DORIS Service
[Termes IGN] mission spatiale
[Termes IGN] orbitographie
[Termes IGN] positionnement par ITGB
[Termes IGN] positionnement par télémétrie laser sur satellite
[Termes IGN] repère de référenceRésumé : (auteur) In 2009, the geoscience community has fixed an objective of 1 mm accuracy and 0.1 mm/yr stability for the terrestrial reference frame (TRF) realization (Global Geodetic Observing System, GGOS, Meeting the Requirements of a Global Society on a Changing Planet in 2020, Plag and Pearlman in Global geodetic observing system: meeting the requirements of a global society on a changing planet in 2020. Springer, Berlin, 2009. https://doi.org/10.1007/978-3-642-02687-4). This accuracy and stability are needed for diversified studies like climate change, tectonic sciences and more generally any geoscience requiring the use of an accurate and precise TRF. Unfortunately, they are still not reached by the last International Terrestrial Reference Frame. To reach this goal, the use of “multi-technique” satellites as “space-ties” has been studied since 2011 and a few proposals have been made in response to different space agency calls: the Geodetic Reference Antenna in Space (GRASP) mission—NASA Earth Venture 2 call, Eratosthenes-GRASP (E-GRASP)—ESA Earth Explorer 9 (EE9) call, MOBILE—ESA EE10 call, MARVEL—CNES Séminaire de Prospective Scientifique 2019). In this article, we present the numerical simulations carried out by the French Groupe de Recherche de Géodésie Spatiale (GRGS) for the E-GRASP proposal in response to the ESA EE-9 call and their improvements carried out afterwards. These simulations aim to answer three different questions:
Is it possible to reach the GGOS requirements for the TRF with the measurements of a GRASP-like satellite like E-GRASP alone?
If it is possible, which level of accuracy for the positioning of the on-board antennas is needed?
What is the minimal lifetime of a E-GRASP mission to reach the GGOS requirements?
The results of these simulations show that a E-GRASP satellite can allow us to reach, after five years, an accuracy close to 1 mm and a stability better than 0.1 mm/yr for the TRF. However, it is necessary to ensure a positioning better than 1 mm for the on-board antennas. We therefore encourage the new ESA GENESIS mission proposal, accepted during the ESA last Ministerial meeting on 23rd November 2022, which takes up the concept of a GRASP-type satellite.Numéro de notice : A2023-227 Affiliation des auteurs : UMR IPGP-Géod+Ext (2020- ) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-023-01730-4 Date de publication en ligne : 15/05/2023 En ligne : https://doi.org/10.1007/s00190-023-01730-4 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=103247
in Journal of geodesy > vol 97 n° 5 (May 2023) . - n° 45[article]
Titre : U-SBAS: A universal multi-SBAS standard to ensure compatibility, interoperability and interchangeability Type de document : Article/Communication Auteurs : Mohamed Sahmoudi, Auteur ; Jean-Luc Issler, Auteur ; Felix Perozans, Auteur ; Youssef Tawk, Auteur ; Aleksandar Jovanovic, Auteur ; Cyril Botteron, Auteur ; Pierre-André Farine, Auteur ; Landry René, Auteur ; Véronique Dehant, Auteur ; Alessandro Caporali, Auteur ; Serge Reboul, Auteur ; Pascal Willis Editeur : New York : Institute of Electrical and Electronics Engineers IEEE Année de publication : 2010 Conférence : NAVITEC 2010, 5th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing 08/12/2010 10/12/2010 Noordwijk Pays-Bas Proceedings IEEE Importance : 18 p. Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] interopérabilité
[Termes IGN] standard
[Termes IGN] système d'extensionRésumé : (auteur) Several regional augmentation GNSS systems (like SBAS) are already fully operational and other are under development with new frequencies and signals on the way. Therefore, it becomes imperative to guarantee for all GNSS users the compatibility, interoperability and interchangeability between all these systems. The goal is to ensure that the user's multi-mode receiver can choose and mix signals from different GNSS and SBAS systems to achieve more availability, accuracy and robustness. Attaining that objective will require agreements on frequency plans and signal designs, as well as other details including means to ensure interoperability of system times and geodetic reference systems. This paper suggests a Universal-SBAS (U-SBAS) standard, compatible with all the existing and planned regional GNSS systems (and their evolutions) in the world, like IRNSS, QZSS, PCW, BEIDOU-1, WAAS, EGNOS, SDCM, GAGAN, MSAS. The proposed worldwide multimodal U-SBAS standard carries additional channels (signals and messages) to cover the non-aeronautical specific Safety-of-Life (SoL) services, and also High Precision Positioning Services (HPPS), Position Velocity Time (PVT), authentication services, safety services, scientific application services, High Precision Timing Services (HPTS), etc. U-SBAS is designed to be fully interoperable with the current SBAS standards and to allow significant performance and service improvements in operational, scientific and/or security areas. Finally usage examples of the proposed standard are given for different types of applications such as science, aviation, precise point positioning, timing, security, robust positioning, maritime and reflectometry. Numéro de notice : C2010-074 Affiliation des auteurs : LAREG+Ext (1991-2011) Thématique : POSITIONNEMENT Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1109/NAVITEC.2010.5708076 En ligne : https://doi.org/10.1109/NAVITEC.2010.5708076 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=102057
