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Defining a DORIS core network for Jason-1 precise orbit determination based on ITRF2000 : methods and realization / Pascal Willis in Journal of geodesy, vol 79 n° 6-7 (September - October 2005)
[article]
Titre : Defining a DORIS core network for Jason-1 precise orbit determination based on ITRF2000 : methods and realization Type de document : Article/Communication Auteurs : Pascal Willis , Auteur ; J.C. Ries, Auteur Année de publication : 2005 Article en page(s) : pp 370 - 378 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] Jason
[Termes IGN] orbitographie
[Termes IGN] point de liaison (géodésie)
[Termes IGN] positionnement par DORIS
[Termes IGN] station DORIS
[Termes IGN] système de référence géodésique
[Termes IGN] TOPEX-PoseidonRésumé : (Auteur) In view of the future adoption of the new precise orbit determination (POD) standards for the TOPEX/Poseidon and Jason-1 satellites, we propose a method to evaluate terrestrial reference frames for POD. We applied this method to the ITRF2000 realization of the DORIS network using local geodetic ties, plate motion models, the recent DORIS IGNO4DO2 cumulative solution and DORIS weekly time-series of coordinates. We propose to adopt a selection of the ITRF2000 realization based on specific criteria that we define here, and to extend it with ground stations for which we propose new coordinates and velocities. Only 13 out of 131 stations were considered to be inappropriate for POD activities. The result is a robust and well-distributed DORIS core network of 118 stations (DPOD2000) suitable for POD during the 1993-2008 period considered here. Numéro de notice : A2005-370 Affiliation des auteurs : IGN+Ext (1940-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-005-0475-9 Date de publication en ligne : 07/07/2005 En ligne : http://dx.doi.org/10.1007/s00190-005-0475-9 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27506
in Journal of geodesy > vol 79 n° 6-7 (September - October 2005) . - pp 370 - 378[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 266-05072 RAB Revue Centre de documentation Revues en salle Disponible 266-05071 RAB Revue Centre de documentation Revues en salle Disponible Doris satellite antenna maps derived from long-term residuals time series / Pascal Willis in Advances in space research, vol 36 n° 3 (March 2005)
[article]
Titre : Doris satellite antenna maps derived from long-term residuals time series Type de document : Article/Communication Auteurs : Pascal Willis , Auteur ; Shailen Desai, Auteur ; Willy I. Bertiger, Auteur ; Bruce J. Haines, Auteur ; Albert Auriol, Auteur Année de publication : 2005 Article en page(s) : pp 486 - 497 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] balise DORIS
[Termes IGN] DORIS
[Termes IGN] orbitographie
[Termes IGN] phase
[Termes IGN] récepteur DORIS
[Termes IGN] série temporelle
[Termes IGN] trajet multipleRésumé : (Auteur) Recent studies have shown that phase pattern models for the Jason1 GPS antenna significantly benefit GPSbased precise orbit determination (POD) for the satellite. We have used a similar technique to derive DORIS receiver antenna maps, using all available DORIS tracking data over long time periods (from 1993.0 to 2004.0). We demonstrate that the derived correction models are satellite specific. For a given satellite, yeartoyear estimations show clear systematic patterns. Some of these systematic patterns are attributable to the derivative of the multipath effects in the direction of the satellite velocity. For early SPOT data, the patterns can be explained by an offset in the TAI time tagging (typically 8 us). In a second step, we have applied the SPOT2 antenna correction models in precise orbit determination and in the positioning of ground beacons. Preliminary results on DORIS/SPOT2 show that application of the DORIS antenna maps lead to a slight improvement of the derived POD and geodetic results (typically less than 5%). Numéro de notice : A2005-603 Affiliation des auteurs : IGN+Ext (1940-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.asr.2005.03.095 Date de publication en ligne : 06/05/2005 En ligne : https://doi.org/10.1016/j.asr.2005.03.095 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33946
in Advances in space research > vol 36 n° 3 (March 2005) . - pp 486 - 497[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 38017-01 30.82 Tiré à part Centre de documentation Géodésie Disponible Effects of thermosphere total density pertubations on LEO Orbits during severe geomagnetic conditions (Oct-Nov 2003) using Doris and SLR data / Florent Deleflie in Advances in space research, vol 36 n° 3 (March 2005)
[article]
Titre : Effects of thermosphere total density pertubations on LEO Orbits during severe geomagnetic conditions (Oct-Nov 2003) using Doris and SLR data Type de document : Article/Communication Auteurs : Florent Deleflie, Auteur ; François Barlier, Auteur ; Yoaz E. Bar-Sever, Auteur ; L.J. Romans, Auteur ; Pascal Willis , Auteur Année de publication : 2005 Article en page(s) : pp 522 - 533 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] bruit blanc
[Termes IGN] données DORIS
[Termes IGN] filtrage du bruit
[Termes IGN] géomagnétisme
[Termes IGN] orbite basse
[Termes IGN] orbitographie
[Termes IGN] télémétrie laser sur satellite
[Termes IGN] tempête magnétique
[Termes IGN] thermosphèreRésumé : (Auteur) An exceptional solar activity event occurred at the end of October 2003. On October 29th, seven groups of sunspots were visible on the Sun's surface and the geomagnetic index Kp reached the extreme value of 9, leading to beautiful auroras, among other effects. Similar events also occurred in November 2003. These events have been an exceptional opportunity to estimate effects of the thermosphere total density perturbations in extreme conditions on a Low Earth Orbit (LEO orbit corresponding in this study at altitudes ranging from 800 km up to 1400 km). Specifically, we study the best way to get reliable geodetic products even during such solar events, and how well the thermosphere models (DTM78, DTM94, DTM2000, and MSIS86 models) allow us to accomplish this and to predict the observed perturbations on the orbital elements. Thus our analysis is twofold. First, we have computed orbits of satellites equipped with the onboard DORIS tracking system, at an altitude ranging from 800 to 1330 km and for periods of time including these exceptional events (October 2931 and November 20, 2003). We have computed 30hour arc orbits, estimating the drag coefficient parameter very frequently (every minute) using a tight randomwalk constraint or using a white noise reset in the Gipsy/Oasis software. We show that significant errors are obtained for the considered thermosphere models, but can be greatly improved. using a more sophisticated data processing. We also investigated how these proposed processing strategies affect the quality of the DORIS geodetic products. Significant improvements were found for weekly stations coordinates estimations as well as for polar motion determination.
In addition, we have investigated the global quality of the modeling of the variations of the mean orbital elements in using thermosphere models over long periods of time including such severe geomagnetic events. This original approach is based on averaging techniques implemented in the CODIOR software. We have analysed the continuous longterm evolution of the semimajor axis of the geodetic satellites Starlette, Stella and Ajisai tracked by the Satellite Laser Ranging (SLR) network. In this second part, we give: (i) a single global empirical coefficient per satellite, to validate the models over the whole duration of the orbital arc, including the exceptional solar activity events, and (ii) one coefficient per a period of about 2 months to quantify the seasonal differences between the models and the observations.
As a result of both investigations, we compare the capability of recent models of thermosphere to allow us to get reliable geodetic products and mean orbital elements variations over short and long periods of time as well as for the recent exceptional geomagnetic events. Different altitudes are considered: around 800900 km for the Stella and Starlette satellites tracked by laser ranging systems and SPOT tracked by DORIS; around also 13001400 km for the Ajisai satellite tracked by laser techniques and TOPEX and Jason also tracked by DORIS. It appears in our study that laser and DORIS data are complementary to probe the thermosphere, and to test the quality of thermosphere models in specific conditions for getting accurate geodetic products.Numéro de notice : A2005-611 Affiliation des auteurs : IGN+Ext (1940-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.asr.2005.03.029 Date de publication en ligne : 13/04/2005 En ligne : https://doi.org/10.1016/j.asr.2005.03.029 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33947
in Advances in space research > vol 36 n° 3 (March 2005) . - pp 522 - 533[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 38017-01 30.82 Tiré à part Centre de documentation Géodésie Disponible New moon rising / M. Bedford in GEO:connexion, vol 4 n° 3 (march 2005)
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Titre : New moon rising Type de document : Article/Communication Auteurs : M. Bedford, Auteur Année de publication : 2005 Article en page(s) : pp 51 - 53 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] coût
[Termes IGN] Galileo
[Termes IGN] orbitographie
[Termes IGN] valeur ajoutéeRésumé : (Documentaliste) L'article développe les objectifs et les moyens du système Galileo. Numéro de notice : A2005-095 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27233
in GEO:connexion > vol 4 n° 3 (march 2005) . - pp 51 - 53[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 062-05031 RAB Revue Centre de documentation En réserve L003 Disponible Terrestrial Reference Frames effects on global sea level rise determination from Topex-Poseidon altimetric data / Laurent Morel in Advances in space research, vol 36 n° 3 (March 2005)
[article]
Titre : Terrestrial Reference Frames effects on global sea level rise determination from Topex-Poseidon altimetric data Type de document : Article/Communication Auteurs : Laurent Morel, Auteur ; Pascal Willis , Auteur Année de publication : 2005 Article en page(s) : pp 358 - 368 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] altimétrie satellitaire par radar
[Termes IGN] données altimétriques
[Termes IGN] incertitude des données
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] niveau moyen des mers
[Termes IGN] orbitographie
[Termes IGN] repère de référenceRésumé : (Auteur) Over the past years, satellite altimetry has produced several significant improvements in our scientific understanding of the oceans. However, several results related to global or regional sea level changes still too often rely on the assumption that orbit errors coming from station coordinates adoption can be neglected in the total error budget. The goal of this paper is to specifically study this general assumption and to assess its limitation. In a first step, in the case of the TOPEX/Poseidon satellite, we first characterized orbital errors coming from the adoption of a specific Terrestrial Reference Frame using a MonteCarlobased simulation method using DORIS data. In a second step, we analysed the effect of these systematic orbital errors on the mean sea level derived from altimeter data. From these results, we derived linear transfer functions that can be used for several purposes like error budget estimation in altimetry or local tic specifications for the implementation of new tracking stations. These simulations show that the main source of errors comes from current imprecision in the Zaxis realization of the frame. A 10 mm error in the TZ realization can create a 1.2 mm of systematic errors in the derived mean sea level due to the NorthSouth asymmetric distribution of the oceans A over the world. Significant sea level rise could erroneously be attributed to a possible warming of the biosphere while they just come from systematic errors in the Terrestrial Reference Frame used to generate the satellite operational orbits. Finally, we assessed the accuracy of present Terrestrial Reference Frame realizations and derived a realistic error budget for this specific source of error. For the ITRF97 realization, a current precision of 3.0 mm in sea level and 0.37 mm/yr in sea level rise was obtained. These precisions should gradually improve with future Terrestrial Reference Frame realizations. Numéro de notice : A2005-602 Affiliation des auteurs : IGN+Ext (1940-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.asr.2005.05.113 Date de publication en ligne : 25/07/2005 En ligne : https://doi.org/10.1016/j.asr.2005.05.113 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33907
in Advances in space research > vol 36 n° 3 (March 2005) . - pp 358 - 368[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 38017-01 30.82 Tiré à part Centre de documentation Géodésie Disponible Calcul de l'allongement troposphérique via l'utilisation de cartes de l'ECMWF / Samuel Nahmani (2005)PermalinkComportement de l'oscillateur DORIS/Jason au passage de l'anomalie sud-atlantique / Pascal Willis in Comptes rendus : Géoscience, tome 336 n°9 (July 2004)PermalinkCelebrating a decade of the International GPS Service, Workshop & Symposium 2004 / Michael Meindl (2004)PermalinkGPS satellite surveying / Alfred Leick (2004)PermalinkImproved DORIS accuracy for precise orbit determination and geodesy / Pascal Willis (2004)PermalinkOne-centimeter orbit determination for Jason-1: New GPS-based strategies / Bruce J. Haines in Marine geodesy, vol 27 n°1-2 (January - June 2004)PermalinkNear real-time geocoding of SAR imagery with orbit error removal / A.J.E. Smith in International Journal of Remote Sensing IJRS, vol 24 n° 24 (December 2003)PermalinkInitial orbit determination results for Jason-1: Towards a 1 cm orbit / Bruce J. Haines in Navigation : journal of the Institute of navigation, vol 50 n° 3 (Fall 2003)PermalinkTopex-Jason combined GPS-DORIS orbit determination in the TanDEM phase / Pascal Willis in Advances in space research, vol 31 n° 8 (14/03/2003)PermalinkInstrument of GRACE: GPS augments gravity measurements / C. Dunn in GPS world, vol 14 n° 2 (February 2003)Permalink