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Doris: from orbit determination for altimeter missions to geodesy / Pascal Willis in Comptes rendus : Géoscience, vol 338 n° 14-15 (November 2006)
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Titre : Doris: from orbit determination for altimeter missions to geodesy Type de document : Article/Communication Auteurs : Pascal Willis , Auteur ; Christian Jayles, Auteur ; Yoaz E. Bar-Sever, Auteur
Année de publication : 2006 Article en page(s) : pp 968 - 979 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] altimétrie satellitaire par radar
[Termes IGN] données DORIS
[Termes IGN] International DORIS Service
[Termes IGN] orbite basse
[Termes IGN] orbitographie
[Termes IGN] positionnement par DORIS
[Termes IGN] précision centimétrique
[Termes IGN] temps réelRésumé : (Auteur) In the late 1980s, the French Centre national d'études spatiales' (CNES), in conjunction with the Institut géographique national' (IGN) and the Groupe de recherche en géodésie spatiale' (GRGS) developed a new geodetic tracking system called DORIS for precise orbit determination of low Earth orbiting satellites for oceanographic missions. Since then, the number of applications has increased, leading recently to the creation of an International DORIS Service (IDS), making it a part of the Global Geodetic Observation System (GGOS) currently under development within the International Association of Geodesy (IAG). The goal of this paper is to present the current applications of the DORIS system for precise orbit determination as well as for geodesy, geophysics, Earth rotation or atmospheric sciences. Current accuracies are discussed as well as already planned improvements. In particular, recent improvements in on-board real time orbit showing 5-cm radial agreement with post-processed orbits are discussed. In addition, when using a 5-satellite constellation, 1-cm precision is achievable for station position as well as sub milli-arcsecond precision for polar motion. Copyright Elsevier Numéro de notice : A2006-659 Affiliation des auteurs : LAREG+Ext (1991-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueNat DOI : 10.1016/j.crte.2005.11.013 Date de publication en ligne : 24/01/2006 En ligne : https://doi.org/10.1016/j.crte.2005.11.013 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33631
in Comptes rendus : Géoscience > vol 338 n° 14-15 (November 2006) . - pp 968 - 979[article]Error analysis of weekly station coordinates in the DORIS network / Simon D.P. Williams in Journal of geodesy, vol 80 n° 8-11 (November 2006)
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Titre : Error analysis of weekly station coordinates in the DORIS network Type de document : Article/Communication Auteurs : Simon D.P. Williams, Auteur ; Pascal Willis , Auteur
Année de publication : 2006 Article en page(s) : pp 525 - 539 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] bruit blanc
[Termes IGN] bruit rose
[Termes IGN] calcul d'erreur
[Termes IGN] données DORIS
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] méthode du maximum de vraisemblance (estimation)
[Termes IGN] série temporelle
[Termes IGN] station DORIS
[Termes IGN] traitement du signalRésumé : (Auteur) Twelve years of DORIS data from 31 selected sites of the IGN/JPL (Institut Géographique National/Jet Propulsion Laboratory) solution IGNWD05 have been analysed using maximum likelihood estimation (MLE) in an attempt to understand the nature of the noise in the weekly station coordinate time-series. Six alternative noise models in a total of 12 different combinations were used as possible descriptions of the noise. The six noise models can be divided into two natural groups, temporally uncorrelated (white) noise and temporally correlated (coloured) noise. The noise can be described as a combination of variable white noise and one of flicker, first-order Gauss–Markov or power-law noise. The data set as a whole is best described as a combination of variable white noise plus flicker noise. The variable white noise, which is white noise with variable amplitude that is a function of the weekly formal errors multiplied by an estimated scale factor, shows a dependence on site latitude and the number of DORIS-equipped satellites used in the solution. The latitude dependence is largest in the east component due to the near polar orbit of the SPOT satellites. The amplitude of the flicker noise is similar in all three components and equal to about 20 mm/year1/4. There appears to be no latitude dependence of the flicker noise amplitude. The uncertainty in rates (site velocities) after 12 years is just under 1 mm/year. These uncertainties are around 3–4 times larger than if only variable white noise had been assumed, i.e., no temporally correlated noise. A rate uncertainty of 1 mm/year after 12 years in the vertical is similar to that achieved using Global Positioning System (GPS) data but it takes DORIS twice as long to reach 1 mm/year than GPS in the horizontal. The analysis has also helped to identify sites with either anomalous noise characteristics or large noise amplitudes, and tested the validity of previously proposed discontinuities. In addition, several new offsets were found in the time-series that should be used or at least flagged in future work. Copyright Springer Numéro de notice : A2006-534 Affiliation des auteurs : IGN (1940-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-006-0056-6 En ligne : http://doi.org/10.1007/s00190-006-0056-6 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28257
in Journal of geodesy > vol 80 n° 8-11 (November 2006) . - pp 525 - 539[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 266-06102 RAB Revue Centre de documentation En réserve L003 Disponible 266-06101 RAB Revue Centre de documentation En réserve L003 Disponible Estimating the noise in space-geodetic positioning: the case of DORIS / Karine Le Bail in Journal of geodesy, vol 80 n° 8-11 (November 2006)
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Titre : Estimating the noise in space-geodetic positioning: the case of DORIS Type de document : Article/Communication Auteurs : Karine Le Bail , Auteur
Année de publication : 2006 Article en page(s) : pp 541 - 565 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] bruit blanc
[Termes IGN] bruit rose
[Termes IGN] données DORIS
[Termes IGN] ENVISAT
[Termes IGN] filtrage du bruit
[Termes IGN] méthode du maximum de vraisemblance (estimation)
[Termes IGN] positionnement par DORIS
[Termes IGN] série temporelle
[Termes IGN] SPOT
[Termes IGN] station DORIS
[Termes IGN] TOPEX-Poseidon
[Termes IGN] traitement du signalRésumé : (Auteur) The noise spectrum in DORIS ground-station motion is investigated by means of the Allan variance method applied to the decomposition of the 3D signal into its principal components in the time domain. Sets of weekly position time-series from 1994 to 2005 derived by three IDS Analysis Centres (IGN-JPL, INASAN, and LEGOS-CLS) for 119 stations at 69 sites are considered. The observing satellites are SPOT-2, SPOT-3, SPOT-4, and SPOT-5, TOPEX/Poseidon, and ENVISAT. Annual and semi-annual perturbations, as well as the 117.3-day term associated with the TOPEX/Poseidon orbit, are found at most stations. Their amplitudes reach up to 19.3, 23.7, and 13.3 mm, respectively, for the three analysis centres (ACs). When corrected for these components and a linear drift, the time-series dominantly show white noise (WN) at the 10-45mm level the noise level is the highest in the East direction, probably in connection with the high orbit inclinations. The noise level is minimum for the high latitude stations, mostly and intensively observed by the SPOT satellites, and the determination of the noise type is unclear; longer observation spans would be needed to decide between interannual variations and flicker noise. The improvement in positioning due to the DORIS constellation extension from three to five satellites in 2002, and the network rejuvenation program initiated in 2000, results in a decrease of the noise level by a factor of 1.7 in a WN context, both before and after the changes. One example of the benefit of studying the signal in the time eigenspace domain is the detection of anomalously large WN in the East direction for station HBKB (Hartebeesthoek, Africa) that masks the above-mentioned improvement. Studying the projection on the local frame of the second and third time-eigenspace components, a noise excess is detected in the North direction for some of the ACs. Station stability derived from our time-series analysis confirms, in general, the expected performance based on the careful technical review of the station components (antenna, pillar, etc.). The respective merits of our noise qualification method, based on direct time-series analysis in the time-eigenspace domain without any a priori statistical model, in comparison with other methods, such as the selection of a mixed-noise model by maximum likelihood estimation, are discussed. Copyright Springer Numéro de notice : A2006-535 Affiliation des auteurs : IGN (1940-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-006-0088-y En ligne : https://doi.org/10.1007/s00190-006-0088-y Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28258
in Journal of geodesy > vol 80 n° 8-11 (November 2006) . - pp 541 - 565[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 266-06102 RAB Revue Centre de documentation En réserve L003 Disponible 266-06101 RAB Revue Centre de documentation En réserve L003 Disponible GPS time transfer: using precise point positioning for clock comparisons / François Lahaye in GPS world, vol 17 n° 11 (November 2006)
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Titre : GPS time transfer: using precise point positioning for clock comparisons Type de document : Article/Communication Auteurs : François Lahaye, Auteur ; D. Orgiazzi, Auteur ; P. Tavella, Auteur ; G. Cerretto, Auteur Année de publication : 2006 Article en page(s) : pp 44 - 49 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] analyse comparative
[Termes IGN] Global Positioning System
[Termes IGN] mesurage de pseudo-distance
[Termes IGN] phase GPS
[Termes IGN] positionnement ponctuel précis
[Termes IGN] récepteur bifréquence
[Termes IGN] récepteur GPS
[Termes IGN] temps atomique internationalRésumé : (Documentaliste) Les auteurs relatent les résultats d'une expérience menée avec la méthode de transfert de temps "Precise Point Positioning PPP" de post-traitement des données GPS par comparaison avec les mesures de transfert de temps et fréquence du satellite par 2 voies (Two-Way Satellite Time and Frequency Transfer TWSTFT). La méthode PPP permet une précision au niveau de la nano-seconde, sans avoir recours au réseau des stations. Numéro de notice : A2006-474 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28198
in GPS world > vol 17 n° 11 (November 2006) . - pp 44 - 49[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 067-06111 RAB Revue Centre de documentation En réserve L003 Disponible Practical satellite navigation: part 7 receiver installation / Huibert-Jan Lekkerkerk in Geoinformatics, vol 9 n° 7 (01/11/2006)
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Titre : Practical satellite navigation: part 7 receiver installation Type de document : Article/Communication Auteurs : Huibert-Jan Lekkerkerk, Auteur Année de publication : 2006 Article en page(s) : pp 54 - 55 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] antenne GPS
[Termes IGN] récepteur GPS
[Termes IGN] station de terrain mobileRésumé : (Auteur) In the previous article on Practical satellite naviation, installing the base was discussed. This is only part a full installation. Just as important is the installation of the mobile station, or rover. There is a distinct difference between installation on mobile platforms such as construction equipment and installation for land survey or GIS use, which will both be discussed in this article. Copyright GEOInformatics Numéro de notice : A2006-482 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28206
in Geoinformatics > vol 9 n° 7 (01/11/2006) . - pp 54 - 55[article] Voir aussiRéservation
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Code-barres Cote Support Localisation Section Disponibilité 262-06071 SL Revue Centre de documentation Revues en salle Disponible PermalinkReview Magellan promark-3: three GPS solutions in one / Huibert-Jan Lekkerkerk in Geoinformatics, vol 9 n° 7 (01/11/2006)
Permalinkvol 338 n° 14-15 - November 2006 - La Terre observée depuis l'espace (Bulletin de Comptes rendus : Géoscience) / Anny Cazenave
PermalinkThe international DORIS service: genesis and early achievements / Gilles Tavernier in Journal of geodesy, vol 80 n° 8-11 (November 2006)
PermalinkTwenty years of evolution for the DORIS permanent network: from its initial deployment to its renovation / Hervé Fagard in Journal of geodesy, vol 80 n° 8-11 (November 2006)
PermalinkGeodynamics of the Balkan Peninsula: monograph compiled in the frame of the project CERGOP-2 environment (Bulletin de Reports on geodesy) / G. Milev
Permalinkvol 17 n° 9 - September 2006 (Bulletin de GPS world)
PermalinkPhase wind-up analysis: assessing real-time kinematic performance / D. Kim in GPS world, vol 17 n° 9 (September 2006)
PermalinkReports on geodynamics of Central Europe: current status of geotectonic investigations in Central Europe (Bulletin de Reports on geodesy) / J. Liszkowski
PermalinkSystematic effects in absolute chamber calibration of GPS antennas / Philipp Zeimetz in Geomatica, vol 60 n° 3 (September 2006)
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