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Termes IGN > sciences naturelles > sciences de la Terre et de l'univers > géosciences > géophysique interne > géodésie > géodésie spatiale > système de positionnement par satellites > Global Positioning System
Global Positioning SystemSynonyme(s)Navigation system by timing and ranging gpsVoir aussi |
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Global sea-level rise and its relation to the terrestrial reference frame / Xavier Collilieux in Journal of geodesy, vol 85 n° 1 (January 2011)
[article]
Titre : Global sea-level rise and its relation to the terrestrial reference frame Type de document : Article/Communication Auteurs : Xavier Collilieux , Auteur ; Guy Wöppelmann , Auteur Année de publication : 2011 Article en page(s) : pp 9 - 22 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] niveau moyen des mers
[Termes IGN] propagation d'erreur
[Termes IGN] station GPSRésumé : (Auteur) We examined the sensitivity of estimates of global sea-level rise obtained from GPS-corrected long term tide gauge records to uncertainties in the International Terrestrial Reference Frame (ITRF) realization. A useful transfer function was established, linking potential errors in the reference frame datum (origin and scale) to resulting errors in the estimate of global sea level rise. Contrary to scale errors that are propagated by a factor of 100%, the impact of errors in the origin depends on the network geometry. The geometry of the network analyzed here resulted in an error propagation factor of 50% for the Z component of the origin, mainly due to the asymmetry in the distribution of the stations between hemispheres. This factor decreased from 50% to less than 10% as the geometry of the network improved using realistic potential stations that did not yet meet the selection criteria (e.g., record length, data availability). Conversely, we explored new constraints on the reference frame by considering forward calculations involving tide gauge records. A reference frame could be found in which the scatter of the regional sea-level rates was limited. The resulting reference frame drifted by 1.36 + 0.22 mm/year from the ITRF2000 origin in the Z component and by -0.44 + 0.22 mm/year from the ITRF2005 origin. A bound on the rate of global sea level rise of 1.2 to 1.6 mm/year was derived for the past century, depending on the origin of the adopted reference frame. The upper bound is slightly lower than previous estimates of 1.8 mm/year discussed in the IPCC fourth report. Numéro de notice : A2011-056 Affiliation des auteurs : IGN+Ext (1940-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-010-0412-4 Date de publication en ligne : 05/10/2010 En ligne : https://doi.org/10.1007/s00190-010-0412-4 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30837
in Journal of geodesy > vol 85 n° 1 (January 2011) . - pp 9 - 22[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 266-2011011 RAB Revue Centre de documentation En réserve L003 Disponible Mesoscale water cycle within the West African Monsoon / Christophe Peugeot in Atmospheric Science Letters, vol 12 n° 1 (January - March 2011)
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Titre : Mesoscale water cycle within the West African Monsoon Type de document : Article/Communication Auteurs : Christophe Peugeot, Auteur ; Françoise Guichard, Auteur ; Olivier Bock , Auteur ; Dominique Bouniol, Auteur ; Michel Chong, Auteur ; Aaron Boone, Auteur ; Bernard Cappelaere, Auteur ; Marielle Gosset, Auteur ; Lucas Besson, Auteur ; Yvon Lemaître, Auteur ; Luc Séguis, Auteur ; Abderrahim Zannou, Auteur ; Sylvie Galle, Auteur ; Jean-Luc Redelsperger, Auteur Année de publication : 2011 Projets : AMMA & AMMA-2 / Janicot, Serge Article en page(s) : pp 45 - 50 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] Afrique occidentale
[Termes IGN] Bénin
[Termes IGN] bilan hydrique
[Termes IGN] données météorologiques
[Termes IGN] évapotranspiration
[Termes IGN] modèle météorologique
[Termes IGN] mousson
[Termes IGN] Niger
[Termes IGN] précipitation
[Termes IGN] station GPSRésumé : (Auteur) We review the main studies on mesoscale water cycle from the African Monsoon Multidisciplinary Analysis (AMMA) project. The estimations of precipitation and evapotranspiration, which are the coupling terms between the atmosphere and the surface water cycles, are addressed. Advances in the evaluation of the various components of atmospheric and surface water budgets are reported, and the yearly surface budgets for the Benin and Niger AMMA mesoscale sites are given as examples. The major outcomes and limitations of atmosphere‐surface model coupling exercises are also reported. The paper concludes with suggestions on the research directions on which the community should make future efforts. Numéro de notice : A2011-595 Affiliation des auteurs : LAREG+Ext (1991-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : doi.org/10.1002/asl.309 Date de publication en ligne : 22/02/2011 En ligne : https://doi.org/10.1002/asl.309 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=91527
in Atmospheric Science Letters > vol 12 n° 1 (January - March 2011) . - pp 45 - 50[article]The distress alerting satellite system: Taking the search out of search and rescue / D. Affens in GPS world, vol 22 n° 1 (January 2011)
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Titre : The distress alerting satellite system: Taking the search out of search and rescue Type de document : Article/Communication Auteurs : D. Affens, Auteur ; R. Dreibelbis, Auteur ; J. Mentall, Auteur ; G. Theodorakos, Auteur Année de publication : 2011 Article en page(s) : pp 72 - 79 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] balise
[Termes IGN] constellation Galileo
[Termes IGN] constellation GLONASS
[Termes IGN] constellation GPS
[Termes IGN] image radar moirée
[Termes IGN] médecine humaine
[Termes IGN] positionnement par GNSS
[Termes IGN] secours d'urgenceRésumé : (Editeur) In 1997, a Canadian government study determined that an improved search and rescue system would be one based on medium-Earth orbit satellites, which can provide full global coverage, can determine beacon location, and would need fewer ground stations. This month's column examines the architecture of the GPS-based Distress Alerting Satellite System and takes a look at early test results. Numéro de notice : A2011-054 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30835
in GPS world > vol 22 n° 1 (January 2011) . - pp 72 - 79[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 067-2011011 RAB Revue Centre de documentation En réserve L003 Disponible An inter-comparison of zenith tropospheric delays derived from DORIS and GPS data / Olivier Bock in Advances in space research, vol 46 n° 12 (15/12/2010)
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Titre : An inter-comparison of zenith tropospheric delays derived from DORIS and GPS data Type de document : Article/Communication Auteurs : Olivier Bock , Auteur ; Pascal Willis , Auteur ; Maïté Lacarra, Auteur ; Pierre Bosser , Auteur Année de publication : 2010 Article en page(s) : pp 1648 - 1660 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] analyse comparative
[Termes IGN] analyse diachronique
[Termes IGN] antenne GPS
[Termes IGN] données DORIS
[Termes IGN] données GPS
[Termes IGN] erreur systématique
[Termes IGN] propagation troposphérique
[Termes IGN] station DORIS
[Termes IGN] station GPS
[Termes IGN] traitement du signal
[Termes IGN] variabilitéRésumé : (Auteur) Doppler Orbitography Radiopositioning Integrated by Satellite (DORIS) and Global Positioning System (GPS) techniques are similarly affected by propagation delays in the neutral atmosphere (troposphere) and hence make use of similar data processing strategies for reducing this effect. We compare Zenith Tropospheric Delays (ZTDs) estimated from 52 DORIS and GPS station pairs co-located at 35 sites over the 2005–2008 period. We find an overall systematic negative mean bias of -4 mm and a median bias of -2 mm, with a large site-to-site scatter and especially stronger biases over South America, potentially linked to remaining problems related to the South Atlantic Anomaly (SAA) in the current DORIS data processing. The standard deviation of ZTD differences is in the range 4–12 mm over the globe (8 mm on average), with larger values located in the southern hemisphere. The spatial variability of differences is consistent with previous work but remains largely unexplained. DORIS is shown to be much less sensitive to instrumental changes than GPS (only the switch from Alcatel to Starec antenna at Toulouse is detected as an offset of -4 mm in the ZTD time series). On the opposite, discontinuities and spurious annual signals are found in the GPS ZTD solutions. A discontinuity of +5 mm is found on 5 November 2006, linked to the switch from relative to absolute GPS antenna models used in the data processing. The use of modified GPS antennas (e.g. at GODE) or improved antenna models is shown to reduce the spurious annual signal (e.g. from 5 mm to 2 mm at METS). Overall, the agreement between both techniques is good, though DORIS shows a significantly larger random scatter. The high stability and good spatial and temporal coverage make DORIS a potential candidate technique for meteorology and climate studies as long as reasonable time averaging can be applied (e.g. differences are reduced from 8.6 to 2.4 mm with 5-day averages) and no real-time application is considered. This technique could be considered as a potential contributor to Global Geodetic Observing System (GGOS) for climatology. Numéro de notice : A2010-568 Affiliation des auteurs : IGN+Ext (1940-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.asr.2010.05.018 Date de publication en ligne : 21/05/2010 En ligne : https://doi.org/10.1016/j.asr.2010.05.018 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30760
in Advances in space research > vol 46 n° 12 (15/12/2010) . - pp 1648 - 1660[article]The celestial mechanics approach : theoretical foundations / Gerhard Beutler in Journal of geodesy, vol 84 n° 10 (October 2010)
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Titre : The celestial mechanics approach : theoretical foundations Type de document : Article/Communication Auteurs : Gerhard Beutler, Auteur ; Adrian Jäggi, Auteur ; L. Mervart, Auteur ; U. Meyer, Auteur Année de publication : 2010 Article en page(s) : pp 605 - 624 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] antenne GPS
[Termes IGN] champ de pesanteur terrestre
[Termes IGN] constellation GPS
[Termes IGN] mécanique orbitale
[Termes IGN] orbitographieRésumé : (Auteur) Gravity field determination using the measurements of Global Positioning receivers onboard low Earth orbiters and inter-satellite measurements in a constellation of satellites is a generalized orbit determination problem involving all satellites of the constellation. The celestial mechanics approach (CMA) is comprehensive in the sense that it encompasses many different methods currently in use, in particular so-called short-arc methods, reduced-dynamic methods, and pure dynamic methods. The method is very flexible because the actual solution type may be selected just prior to the combination of the satellite-, arc- and technique-specific normal equation systems. It is thus possible to generate ensembles of substantially different solutions - essentially at the cost of generating one particular solution. The article outlines the general aspects of orbit and gravity field determination. Then the focus is put on the particularities of the CMA, in particular on the way to use accelerometer data and the statistical information associated with it. Numéro de notice : A2010-417 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-010-0401-7 Date de publication en ligne : 24/08/2010 En ligne : https://doi.org/10.1007/s00190-010-0401-7 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30610
in Journal of geodesy > vol 84 n° 10 (October 2010) . - pp 605 - 624[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 266-2010101 SL Revue Centre de documentation Revues en salle Disponible Spoofing detection and mitigation with a moving handheld receiver / J. Nielsen in GPS world, vol 21 n° 9 (September 2010)PermalinkThe GPS assimilator: Upgrading receivers via benign spoofing / T. Humphreys in Inside GNSS, vol 5 n° 4 (June 2010)PermalinkThe origins of GPS and the pioneers who launched the system (part one of a two-part story) / B. Parkinson in GPS world, vol 21 n° 5 (May 2010)PermalinkGNSS update: towards operations / Huibert-Jan Lekkerkerk in Geoinformatics, vol 13 n° 3 (01/04/2010)PermalinkGlobal gravity field determination using the GPS measurements made onboard the low Earth orbiting satellite CHAMP / Lars Prange (2010)PermalinkShifting satellites: GNSS update / Huibert-Jan Lekkerkerk in Geoinformatics, vol 13 n° 1 (01/01/2010)PermalinkFinal results of the Italian "Rete Dinamica Nazionale" (RDN) of Istituto Geografico Militare Italiano (IGMI) and its alignment to ETRF2000 / L. Baroni in Bulletin of geodesy and geomatics BGG, vol 68 n° 3 (October 2009)PermalinkMonumentation of geodetic permanent GPS stations: processing of data download in the first year of observation / A. Cavinato in Geoinformatics, vol 12 n° 7 (01/10/2009)PermalinkSignal authentication: a secure civil GNSS for today / S. Lo in Inside GNSS, vol 4 n° 5 (September - October 2009)PermalinkLe marégraphe de Marseille : patrimoine et modernité / Alain Coulomb in XYZ, n° 118 (mars - mai 2009)Permalink