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Network adjustment in surveying engineering: linear goal programming versus least squares / S. Alp in SaLIS Surveying and land information science, vol 70 n° 1 (Spring 2010)
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Titre : Network adjustment in surveying engineering: linear goal programming versus least squares Type de document : Article/Communication Auteurs : S. Alp, Auteur ; E. Yavuz, Auteur ; N. Ersoy, Auteur Année de publication : 2010 Article en page(s) : pp 29 - 37 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] compensation de coordonnées
[Termes IGN] méthode des moindres carrés
[Termes IGN] programmation linéaireRésumé : (Auteur) In engineering, especially in surveying engineering, network adjustment is made to find out the definite values of the unknowns and the measurements. Generally, the least squares method is used for vertical network adjustment. In this study, the linear goal programming method is proposed as an alternative method to the least squares method for network adjustment. The linear goal programming method is explained with an example, and the results are compared. The results found by using these two methods are similar. This study confirms that linear goal programming methods can be used in vertical network adjustment. Copyright SaLIS Numéro de notice : A2010-159 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83712
in SaLIS Surveying and land information science > vol 70 n° 1 (Spring 2010) . - pp 29 - 37[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 121-2010011 RAB Revue Centre de documentation En réserve L003 Disponible Relation between the Italian and European height systems / Alessandro Caporali in Bulletin of geodesy and geomatics BGG, vol 69 n° 1 (March 2010)
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Titre : Relation between the Italian and European height systems Type de document : Article/Communication Auteurs : Alessandro Caporali, Auteur ; F. Cauli, Auteur ; R. Maseroli, Auteur Année de publication : 2010 Article en page(s) : pp 59 - 71 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] altitude normale
[Termes IGN] conversion altimétrique
[Termes IGN] European vertical GPS reference network
[Termes IGN] Italie
[Termes IGN] réseau de nivellement
[Termes IGN] réseau permanent EUREF
[Termes IGN] Rete Dinamica Nazionale
[Termes IGN] Sardaigne
[Termes IGN] Sicile
[Termes IGN] système de référence altimétrique
[Termes IGN] système de référence local
[Termes IGN] transformation de coordonnéesRésumé : (Auteur) The availability at continental scale of a gravimetric quasi geoid model such as EGG08 (European Gravimetric Geoid 2008) and of geodetic networks such as the European Permanent Network of EUREF and its national densifications have the potential to bridge national height networks. The offset and tilts which have traditionally affected the national vertical networks can be calibrated and the resulting continent-wide vertical network represents a common height datum. The relation between the Italian vertical datum, defined in terms of nodal points of fist order leveling lines, and the European EVRS datum is addressed here, on the basis of normal heights from geopotential numbers and of ellipsoidal heights from GEOTRAV GPS/leveling points re-adjusted on the new Rete Dinamica Nazionale consistently with the ETRF2000 frame. Because of the different reference tide gauges, the Continental Italy, Sicily and Sardinia points are analyzed separately. It is shown that these three vertical datums have offsets relative to the EUVN of - 86 + 1, -156 + 1 and - 353 + 2 mm respectively. Continental Italy and Sicily also exhibit a small but non negligible tilt in the east and north direction respectively. Once these offsets and tilts are accounted for, the leveling data fit the values predicted by the GPS and EGG08 data to less than 10 cm rms, consistently with the level of accuracy of the EGG08 quasi geoid. Our result provide those transformation formulas which are necessary to convert normal heights in the national datum into normal heights in the European datum, consistently with the INSPIRE specifications. Numéro de notice : A2010-589 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=77987
in Bulletin of geodesy and geomatics BGG > vol 69 n° 1 (March 2010) . - pp 59 - 71[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 013-2010011 RAB Revue Centre de documentation En réserve L003 Disponible Impact of loading effects on determination of the International Terrestrial Reference Frame / Xavier Collilieux in Advances in space research, vol 45 n° 1 ([04/01/2010])
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Titre : Impact of loading effects on determination of the International Terrestrial Reference Frame Type de document : Article/Communication Auteurs : Xavier Collilieux , Auteur ; Zuheir Altamimi , Auteur ; David Coulot , Auteur ; Tonie M. van Dam, Auteur ; Jim Ray, Auteur Année de publication : 2010 Article en page(s) : pp 144 - 154 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] effet de charge
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] modèle linéaire
[Termes IGN] série temporelleRésumé : (Auteur) The International Terrestrial Reference Frame (ITRF), as a realization of the International Terrestrial Reference System (ITRS), is represented by a set of station positions and linear velocities. They are intended to be used as regularized coordinates to which some corrections should be added to access instantaneous coordinates. The latest ITRS realization is the ITRF2005, which has integrated time series of station positions to form long-term solutions for the four space geodetic techniques. Currently, a purely linear model is used to parameterize station displacements in the estimation process, plus occasional discontinuities in case of earthquakes or equipment changes. However the input data have been derived without applying surface loading models and so surface loading effects are supposed to be embedded in the coordinates as measured quantities. We evaluate the effect of applying a posteriori loading corrections, which include the effect of atmospheric, non-tidal ocean, and continental water loading, to time series of positions estimated from Satellite Laser Ranging (SLR), Very Long Baseline Interferometry (VLBI), and Global Positioning System (GPS) data. We notice that they reduce about 50% or more of the annual signals in the translation and scale parameter time series of the SLR and VLBI techniques, except in SLR Z translation. In general, the estimated secular frame definition is negligibly affected and estimated positions and velocities are not significantly modified for stations that have accumulated a large number of observations. A multi-technique combination of such derived frames allows concluding that, for some cases, loading model corrections might degrade co-located station coordinates almost as much as they benefit them. However, most significant improvement of the estimated secular coordinates is observed for stations with less than 100 estimated positions as demonstrated with a multi-technique combination. Numéro de notice : A2010-640 Affiliation des auteurs : LAREG+Ext (1991-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.asr.2009.08.024 Date de publication en ligne : 01/09/2009 En ligne : https://doi.org/10.1016/j.asr.2009.08.024 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=90717
in Advances in space research > vol 45 n° 1 [04/01/2010] . - pp 144 - 154[article]
contenu dans Journées 2010, systèmes de référence spatio-temporels, Paris, 20-22 septembre 2010 / Nicole Capitaine (2010)
Titre : Examination of some ITRF2008 results Type de document : Article/Communication Auteurs : Zuheir Altamimi , Auteur ; Xavier Collilieux , Auteur Editeur : Paris, Meudon et Nançay : Observatoire de Paris Année de publication : 2010 Conférence : JSRST 2010, Journées systèmes de référence spatio-temporels, New challenges for reference systems and numerical standards in astronomy 20/09/2010 22/09/2010 Paris France OA proceedings Importance : pp 143 - 144 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] International Terrestrial Reference FrameRésumé : (Auteur) Following the procedure already used for the ITRF2005 formation, the ITRF2008 uses as input data time series of station positions and Earth Orientation Parameters (EOPs) provided by the four space geodetic techniques (VLBI, SLR, GPS and DORIS). The integration of these techniques together in the ITRF construction crucially requires co-location sites where two or more techniques are (were) operated and where local ties between the instrument reference points are available. The paper summarizes briefly the main features and results of the ITRF2008, with a particular emphasis on the quality assessment of the estimated quantities: station positions, velocities and Polar motion. For more details regarding the ITRF2008 description and results the reader may refer to Altamimi et al. (2011). Numéro de notice : C2010-007 Affiliation des auteurs : LAREG (1991-2011) Thématique : POSITIONNEMENT Nature : Communication nature-HAL : ComAvecCL&ActesPubliésNat DOI : sans En ligne : https://syrte.obspm.fr/jsr/journees2010/pdf/Altamimi.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=65062 Global optimization of core station networks for space geodesy: application to the referencing of the SLR EOP with respect to ITRF / David Coulot in Journal of geodesy, vol 84 n° 1 (January 2010)
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Titre : Global optimization of core station networks for space geodesy: application to the referencing of the SLR EOP with respect to ITRF Type de document : Article/Communication Auteurs : David Coulot , Auteur ; Arnaud Pollet , Auteur ; Xavier Collilieux , Auteur ; Philippe Berio, Auteur Année de publication : 2010 Article en page(s) : pp 31 - 50 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] algorithme génétique
[Termes IGN] données TLS (télémétrie)
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] optimisation (mathématiques)
[Termes IGN] orientation de la Terre
[Termes IGN] programmation stochastique
[Termes IGN] station de référenceRésumé : (Auteur) We apply global optimization in order to optimize the referencing (and consequently the stability) of the Earth Orientation Parameters (EOP) with respect to ITRF2005. These EOP are derived at a daily sampling from SLR data, simultaneously with weekly station positions. The EOP referencing is carried out with minimum constraints applied weekly to the three rotations and over core station networks. Our approach is based on a multi objective genetic algorithm, a particular stochastic global optimization method, the reference system effects being the objectives to minimize. We thus use rigorous criteria for the optimal weekly core station selection. The results evidence an improvement of 10% of the stability for Polar Motion (PM) series in comparison to the results obtained with the network specially designed for EOP referencing by the Analysis Working Group of the International Laser Ranging Service. This improvement of nearly 25 ?as represents 50% of the current precision of the IERS 05 C04 PM reference series. We also test the possibility of averaging the weekly networks provided by our algorithm (the Genetically Modified Networks—GMN) over the whole time period. Although the dynamical nature of the GMN is clearly a key point of their success, we can derive such a global mean core network, which could be useful for practical applications regarding EOP referencing. Using this latter core network moreover provides more stable EOP series than the conventional network does. Copyright Springer Numéro de notice : A2010-033 Affiliation des auteurs : IGN+Ext (1940-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-009-0342-1 En ligne : https://doi.org/10.1007/s00190-009-0342-1 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30229
in Journal of geodesy > vol 84 n° 1 (January 2010) . - pp 31 - 50[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 266-2010011 SL Revue Centre de documentation Revues en salle Disponible Journées 2010, systèmes de référence spatio-temporels, Paris, 20-22 septembre 2010 / Nicole Capitaine (2010)PermalinkNuevo ajuste de la Red Geodésica de Espana (ROI) en altitudes ortométricas / José Antonio Sanchez Sobrino in Topografia y cartografia, vol 27 n° 156 (01/01/2010)PermalinkPrecise geodetic infrastructure: national requirements for a shared resource / National research council of USA (2010)PermalinkPermalinkSpace-time reference systems for monitoring global change and for precise navigation / Axel Nothnagel (2010)PermalinkConnection of French and British levelling networks : application to UELN / Paul Rebischung (01/12/2009)PermalinkA dynamic reference surface for heights in Canada / E. Rangelova in Geomatica, vol 63 n° 4 (December 2009)PermalinkNational report of France [to the Symposium of the IAG Subcommission 1.3A Europe (EUREF) held in London 6-9 June 2007] / Françoise Duquenne (01/12/2009)PermalinkStatus of the zero-order levelling network of France and consequences for UELN / Henri Duquenne (01/12/2009)PermalinkLocal effects of redundant terrestrial and GPS-based tie vectors in ITRF-like combinations / Claudio Abbondanza in Journal of geodesy, vol 83 n° 11 (November 2009)PermalinkLocal effects of redundant terrestrial and GPS-based tie vectors in ITRF-like combinations / Claudio Abbondanza in Journal of geodesy, vol 83 n° 11 (November 2009)PermalinkETRS89 realization: current status, ETRF2005 and future development / Zuheir Altamimi in Bulletin of geodesy and geomatics BGG, vol 68 n° 3 (October 2009)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)PermalinkHomogeneous reprocessing of the EUREF permanent network : first experiences and comparisons / A. Kenyeres in Bulletin of geodesy and geomatics BGG, vol 68 n° 3 (October 2009)PermalinkLe réseau Teria, un outil moderne pour recueillir des données / Patrick Bezard-Falgas in Géomètre, n° 2063 (octobre 2009)PermalinkAdaptacion al nuevo sistema de referencia ETRS-89 en el ayuntamiento de Vitoria-Gasteiz / N. Quintana in Topografia y cartografia, vol 26 n° 154 (01/09/2009)PermalinkDPOD2005: An extension of ITRF2005 for Precise Orbit Determination / Pascal Willis in Advances in space research, vol 44 n° 5 (1 September 2009)PermalinkLe RGF 93 à l'épreuve du terrain / M. Mayo in Géomètre, n° 2062 (septembre 2009)PermalinkThe kinematics of Ny-Ålesund from space geodetic data / Halfdan Pascal Kierulf in Journal of geodynamics, vol 48 n° 1 (July 2009)PermalinkTopografia y cartografia utilizada en el plan de ordenacion municipal de Guadalajara (Espana) : la importacia de la red geodesica - topografica en urbanismo / F. Maza Vazquez in Topografia y cartografia, vol 26 n° 153 (01/07/2009)Permalink