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The 26 December 2004 tsunami measured by satellite altimetry / J. Gower in International Journal of Remote Sensing IJRS, vol 28 n° 13-14 (July 2007)
[article]
Titre : The 26 December 2004 tsunami measured by satellite altimetry Type de document : Article/Communication Auteurs : J. Gower, Auteur Année de publication : 2007 Article en page(s) : pp 2897 - 2913 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] altimétrie satellitaire par radar
[Termes IGN] Bengale, golfe du
[Termes IGN] données altimétriques
[Termes IGN] épicentre
[Termes IGN] image Envisat
[Termes IGN] Indien (océan)
[Termes IGN] Jason
[Termes IGN] océanographie spatiale
[Termes IGN] séisme
[Termes IGN] surface de la mer
[Termes IGN] TOPEX-Poseidon
[Termes IGN] tsunami
[Vedettes matières IGN] AltimétrieRésumé : (Auteur) The 26 December 2004 magnitude 9 earthquake off Sumatra provided the first examples of travelling tsunami waves in mid-ocean clearly detected by satellite altimetry. The earthquake was the largest since satellite altimetry started in the 1970s and gave peak-to-trough wave heights in mid-ocean of over a metre. The tsunami was detected by three of the four altimeters presently giving sea surface height information. Each detected the spreading front twice, as it moved south-westwards into the Indian Ocean and as it moved northwards into the Bay of Bengal. They also detected the disturbed region closer to the epicentre that expands with the slower velocities of higher-frequency waves. Although the plate rupture is estimated to extend over about 1300 km in a north/south direction, the satellite observations appear consistent with a smaller generation area towards the south of this rupture zone. Fronts observed in the Indian Ocean show a positive first crest. Those observed in the Bay of Bengal are of smaller amplitude and appear to show a first negative first crest (trough). The structure in the Indian Ocean front observed by Jason-1 suggests the possible presence of a shorter-wavelength negative component superimposed on the positive crest. Copyright Taylor & Francis Numéro de notice : A2007-335 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160601094484 En ligne : https://doi.org/10.1080/01431160601094484 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28698
in International Journal of Remote Sensing IJRS > vol 28 n° 13-14 (July 2007) . - pp 2897 - 2913[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 080-07081 RAB Revue Centre de documentation En réserve L003 Disponible Tidal analysis experiments with sun-synchronous satellite altimeter data / R.D. Ray in Journal of geodesy, vol 81 n° 4 (April 2007)
[article]
Titre : Tidal analysis experiments with sun-synchronous satellite altimeter data Type de document : Article/Communication Auteurs : R.D. Ray, Auteur Année de publication : 2007 Article en page(s) : pp 247 - 257 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] altimétrie satellitaire par radar
[Termes IGN] données altimétriques
[Termes IGN] image Envisat
[Termes IGN] image ERS
[Termes IGN] Indien (océan)
[Termes IGN] marée océanique
[Termes IGN] océanographie spatiale
[Termes IGN] orbite héliosynchrone
[Vedettes matières IGN] AltimétrieRésumé : (Auteur) The ERS-1, ERS-2 and Envisat series of satellite altimeters provide the only extensive datasets that could conceivably be usedto constrain ocean tide models in high latitudes. Their sun-synchronous sampling, however, severely limits theobservations of solar tides, especially the principal semidiurnal S2 constituent. The Munk–Cartwright response method is anatural choice when attempting to analyze sun-synchronous data. The present study examines various ways a response analysis might be implemented to extract tides from ERS data. Admittances expressed as simple linear or constant functions of frequency cansometimes improve estimates over standard parameterizations, especially if done in conjunction with a reasonably accurate priorsolution. Some form of regularization, such as ridge regression, is also shown to improve the estimates. The approach provesbeneficial in a test for the southern Indian Ocean tides. It offers some promise for regions otherwise void of usefulobservations. Copyright Springer Numéro de notice : A2007-185 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-006-0105-1 En ligne : https://doi.org/10.1007/s00190-006-0105-1 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28548
in Journal of geodesy > vol 81 n° 4 (April 2007) . - pp 247 - 257[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 266-07041 RAB Revue Centre de documentation En réserve L003 Disponible 266-07042 RAB Revue Centre de documentation En réserve L003 Disponible Assessment of long-range kinematic GPS positioning errors by comparison with airborne laser altimetry and satellite altimetry / X. Zhang in Journal of geodesy, vol 81 n° 3 (March 2007)
[article]
Titre : Assessment of long-range kinematic GPS positioning errors by comparison with airborne laser altimetry and satellite altimetry Type de document : Article/Communication Auteurs : X. Zhang, Auteur ; René Forsberg, Auteur Année de publication : 2007 Article en page(s) : pp 201 - 211 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] altimétrie satellitaire par radar
[Termes IGN] analyse comparative
[Termes IGN] Atlantique Nord
[Termes IGN] glace de mer
[Termes IGN] GPS en mode cinématique
[Termes IGN] Groenland
[Termes IGN] positionnement ponctuel précis
[Termes IGN] précision décimétrique
[Termes IGN] télémétrie laser aéroportéRésumé : (Auteur) Long-range airborne laser altimetry and laser scanning (LIDAR) or airborne gravity surveys in, for example, polar or oceanic areas require airborne kinematic GPS baselines of many hundreds of kilometers in length. In such instances, with the complications of ionospheric biases, it can be a real challenge for traditional differential kinematic GPS software to obtain reasonable solutions. In this paper, we will describe attempts to validate an implementation of the precise point positioning (PPP) technique on an aircraft without the use of a local GPS reference station. We will compare PPP solutions with other conventional GPS solutions, as well as with independent data by comparison of airborne laser data with “ground truth” heights. The comparisons involve two flights: A July 5, 2003, airborne laser flight line across the North Atlantic from Iceland to Scotland, and a May 24, 2004, flight in an area of the Arctic Ocean north of Greenland, near-coincident in time and space with the ICESat satellite laser altimeter. Both of these flights were more than 800 km long. Comparisons between different GPS methods and four different software packages do not suggest a clear preference for any one, with the heights generally showing decimeter-level agreement. For the comparison with the independent ICESat- and LIDAR-derived “ground truth” of ocean or sea-ice heights, the statistics of comparison show a typical fit of around 10 cm RMS in the North Atlantic, and 30 cm in the sea-ice region north of Greenland. Part of the latter 30 cm error is likely due to errors in the airborne LIDAR measurement and calibration, as well as errors in the “ground truth” ocean surfaces due to drifting sea-ice. Nevertheless, the potential of the PPP method for generating 10 cm level kinematic height positioning over long baselines is illustrated. Numéro de notice : A2007-184 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-006-0100-6 En ligne : https://doi.org/10.1007/s00190-006-0100-6 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28547
in Journal of geodesy > vol 81 n° 3 (March 2007) . - pp 201 - 211[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 266-07031 RAB Revue Centre de documentation En réserve L003 Disponible 266-07032 RAB Revue Centre de documentation En réserve L003 Disponible ICESat altimetry data product verification at White Sands Space Harbor / L.A. Magruder in IEEE Transactions on geoscience and remote sensing, vol 45 n° 1 (January 2007)
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Titre : ICESat altimetry data product verification at White Sands Space Harbor Type de document : Article/Communication Auteurs : L.A. Magruder, Auteur ; C.E. Webb, Auteur ; T.J. Urban, Auteur ; et al., Auteur Année de publication : 2007 Article en page(s) : pp 147 - 155 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] altimétrie satellitaire par radar
[Termes IGN] contrôle altimétrique
[Termes IGN] détection du signal
[Termes IGN] données altimétriques
[Termes IGN] données ICEsat
[Termes IGN] ICEsat
[Termes IGN] Nouveau-Mexique (Etats-Unis)
[Termes IGN] signal laser
[Vedettes matières IGN] AltimétrieRésumé : (Auteur) Three unique techniques have been developed to validate the Ice, Cloud, and Land Elevation Satellite (ICESat) mission altimetry data product and implemented at White Sands Space Harbor (WSSH) in New Mexico. One specific technique at WSSH utilizes zenith-pointed sensors to detect the laser on the surface and enable geolocation determination of the altimeter footprint that is independent of the data product generation. The system of detectors also registers the laser light time of arrival, which is related to the data product time tag. Several overflights of the WSSH have validated these time tags to less than 3+ 1 us. The ground-based detector system also verified the laser illuminated spot geolocation to 10.6 m (3.5 arcsec) + 4.5 m on one occasion, which is consistent with the requirement of 3.5 m (1ó). A third technique using corner cube retroreflector signatures in the altimeter echo waveforms was also shown to provide an assessment of the laser spot geolocation. Although the accuracy of this technique is not equal to the other methodologies, it does offer position determination for comparison to the spacecraft altimetry data product. In addition, elevation verifications were made using the comparison of the ICESat elevation products at WSSH to those acquired with an airborne light detection and ranging. The elevation comparisons show an agreement to within + 34 cm (+ 6.7 cm under best conditions) which indicate no significant errors associated with the pointing knowledge of the altimeter. Copyright IEEE Numéro de notice : A2007-077 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2006.885070 En ligne : https://doi.org/10.1109/TGRS.2006.885070 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28442
in IEEE Transactions on geoscience and remote sensing > vol 45 n° 1 (January 2007) . - pp 147 - 155[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-07011 RAB Revue Centre de documentation En réserve L003 Disponible 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]PermalinkDetermination of evolution of the altimetric mean level of western mediterranean from the Jason-1 Data: comparison with analysis of the tidal gauge measurements / M. Haddad in Bulletin des sciences géographiques, n° 18 (octobre 2006)PermalinkComparison of space borne radar altimetry and airborne laser altimetry over sea ice in the Fram Strait / K.A. Giles in International Journal of Remote Sensing IJRS, vol 27 n°15-16 (August 2006)PermalinkFloodplain water storage in the Negro river basin estimated from microwave remote sensing of inundation area and water levels / Frédéric Frappart in Remote sensing of environment, vol 99 n° 4 (15/12/2005)PermalinkTerrestrial 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)PermalinkAmélioration du champ de pesanteur et du géoïde autour de la Corse par gravimétrie aéroportée / Henri Duquenne in XYZ, n° 101 (décembre 2004 - février 2005)PermalinkMonitoring river and lake levels from space / J. Benveniste in ESA bulletin, n° 117 (February 2004)PermalinkPermalinkLa Terre vue de l'espace / Anny Cazenave (2004)PermalinkJason-1, le satellite mesureur des océans / Pascal Bonnefond in XYZ, n° 90 (mars - mai 2002)Permalink