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A new combined European permanent network station coordinates solution / Natalia Panafidina in Journal of geodesy, vol 80 n° 7 (October 2006)
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Titre : A new combined European permanent network station coordinates solution Type de document : Article/Communication Auteurs : Natalia Panafidina, Auteur ; Z. Malkin, Auteur ; Robert Weber, Auteur Année de publication : 2006 Article en page(s) : pp 373 - 380 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] coordonnées GPS
[Termes IGN] EUREF
[Termes IGN] Europe (géographie politique)
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] positionnement par GPS
[Termes IGN] repère de référence
[Termes IGN] réseau géodésique permanent
[Termes IGN] réseau permanent EUREF
[Termes IGN] station de référenceRésumé : (Auteur) The EUREF [International Association of Geodesy (IAG) Reference Frame Sub-Commission for Europe] network of continuously operating GPS stations (EPN) was primarily established for reference frame maintenance, and also plays an important role for geodynamical research in Europe. The main objective of this paper is to obtain an independent homogeneous time series of the EPN station coordinates, which is also available in SINEX format. A new combined solution of the EPN station coordinates was computed. The combination was performed independently for every week, in three steps: (1) the stated constraints on the coordinates were removed from the individual solutions of the Analysis Centers; (2) the de-constrained solutions were aligned to ITRF2000; (3) the resulting solutions were combined using the Helmert blocking technique. All the data from GPS weeks 900 to 1302 (April 1997–December 2004) were used. We investigated in detail the behavior of the transformation parameters aligning the new combined solution to ITRF2000. In general, the time series of the transformation parameters show a good stability in time although small systematic effects can be seen, most likely caused by station instabilities. A comparison of the new combined solution to the official EUREF weekly combined solution is also presented. Copyright Springer Numéro de notice : A2006-450 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-006-0076-2 En ligne : https://doi.org/10.1007/s00190-006-0076-2 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28174
in Journal of geodesy > vol 80 n° 7 (October 2006) . - pp 373 - 380[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 266-06091 RAB Revue Centre de documentation En réserve L003 Disponible 266-06092 RAB Revue Centre de documentation En réserve L003 Disponible Rigorous approach to bore-sight self-calibration in airborne laser scanning [erratum in vol 61 n° 6 February 2007, pages 414-415] / Jan Skaloud in ISPRS Journal of photogrammetry and remote sensing, vol 61 n° 1 (October 2006)
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Titre : Rigorous approach to bore-sight self-calibration in airborne laser scanning [erratum in vol 61 n° 6 February 2007, pages 414-415] Type de document : Article/Communication Auteurs : Jan Skaloud, Auteur ; Derek D. Lichti, Auteur Année de publication : 2006 Article en page(s) : pp 47 - 59 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] angle de visée
[Termes IGN] auto-étalonnage
[Termes IGN] données lidar
[Termes IGN] géoréférencement direct
[Termes IGN] GPS-INS
[Termes IGN] ligne de visée
[Termes IGN] télémétrie laser aéroportéRésumé : (Auteur) We present a rigorous method for estimating some of the calibration parameters in airborne laser scanning (ALS), namely the three bore-sight angles and the range-finder offset. The technique is based on expressing the system calibration parameters within the direct-georeferencing equation separately for each target point, and conditioning a group of points to lie on a common surface of a known form such as a plane. However, the assumed a priori information about á chosen planar features is only their form not the spatial orientation or position. Thus, the 4·á plane parameters are estimated together with the calibration parameters in a combined adjustment model that makes use of GPS/INS-derived position and orientation as well as LiDAR range and encoder angle as observations. To make the approach practical when working with voluminous ALS and GPS/INS data, the contribution of each laser point to the normal equations is formed sequentially. The discussions focus on practical examples with data from a continuously-rotating scanner that reveal the conditions under which almost complete de-correlation between the estimated parameters occurs. In such a case, all bore-sight angles are determined with accuracy that is several times superior to the system noise level. Given sufficiently strong geometry, the presented method is shown to be not only accurate but also very robust in terms of convergence. When appropriate, the method is applicable for calibration of additional systematic effects such as laser-beam encoder offsets or scale factor with minimal modification to the functional model. Copyright ISPRS Numéro de notice : A2006-441 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2006.07.003 En ligne : https://doi.org/10.1016/j.isprsjprs.2006.07.003 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28165
in ISPRS Journal of photogrammetry and remote sensing > vol 61 n° 1 (October 2006) . - pp 47 - 59[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-06071 SL Revue Centre de documentation Revues en salle Disponible
[article]
Titre : Global spatial data model Type de document : Article/Communication Auteurs : E.F. Burkholder, Auteur Année de publication : 2006 Article en page(s) : pp 25 - 27 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Information géographique
[Termes IGN] géoïde local
[Termes IGN] géoïde terrestre
[Termes IGN] modèle conceptuel de données localisées
[Termes IGN] nivellement
[Termes IGN] positionnement par GPSRésumé : (Auteur) Traditional horizontal and vertical datum have two separate origins: respectively Earth’s centre of mass as origin for horizontal, and mean sea level (the geoid) as origin for vertical. The author suggests an alternative option for spatial-data users: a Global Spatial Data Model (GSDM) that has a single origin for geospatial data. Copyright GITC Numéro de notice : A2006-341 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28065
in GIM international > vol 20 n° 9 (September 2006) . - pp 25 - 27[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 061-06091 RAB Revue Centre de documentation En réserve L003 Disponible Good governance, good geo-info / Martien Molenaar in GIM international, vol 20 n° 9 (September 2006)
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Titre : Good governance, good geo-info Type de document : Article/Communication Auteurs : Martien Molenaar, Auteur Année de publication : 2006 Article en page(s) : pp 19 - 23 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données
[Termes IGN] Google Earth
[Termes IGN] information géographique numérique
[Termes IGN] infrastructure nationale des données localisées
[Termes IGN] outil d'aide à la décision
[Termes IGN] positionnement par GPS
[Termes IGN] précision du positionnement
[Termes IGN] service web géographiqueRésumé : (Auteur) Where just two decades ago spatial data was mainly carried on paper maps, map and three-dimensional topographic data is now accessible via Google Earth. Where accurate positioning was once the professional pride of highly trained geodesists, we now see such services provided by GPS-based consumer products. This revolution in technological developments and demand for information implies the need for continuous upgrading of professionals: ‘lifelong learning’. Numéro de notice : A2006-340 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28064
in GIM international > vol 20 n° 9 (September 2006) . - pp 19 - 23[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 061-06091 RAB Revue Centre de documentation En réserve L003 Disponible Phase wind-up analysis: assessing real-time kinematic performance / D. Kim in GPS world, vol 17 n° 9 (September 2006)
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Titre : Phase wind-up analysis: assessing real-time kinematic performance Type de document : Article/Communication Auteurs : D. Kim, Auteur ; R.B. Langley, Auteur ; L. Serrano, Auteur Année de publication : 2006 Article en page(s) : pp 58 - 64 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] antenne GPS
[Termes IGN] GPS en mode cinématique
[Termes IGN] mesurage de phase
[Termes IGN] phase GPS
[Termes IGN] positionnement cinématique en temps réelRésumé : (Auteur) [...] RTK systems, in common with other techniques, are susceptible to biases and errors such as ionospheric and tropospheric refraction along with line-of-sight-dependent phase-measurement effects including multipath, antenna phase-center variation, and carrier-phase phase wind-up. This latter phenomenon may not be familiar to all readers. It is a bias introduced into carrier-phase measurements by the rotation of a GPS receiver’s antenna. There is also a contribution from the rotation of a GPS satellite’s antenna as it orbits about the Earth. In developing an RTK-based vehicle navigation system at the University of New Brunswick (UNB), we have observed a few instances where the phase wind-up due to rotation of the rover receiving antenna can significantly degrade system performance. In this month’s column, we’ll look at carrier-phase wind-up, introducing three wind-up observables that allowed us to perform qualitative assessments of its effects on the UNB RTK system. One motivation behind such an assessment is to determine whether or not we need to proceed to the next step of implementing algorithms to correct for the effects of phase wind-up. I am joined by Dr. Don Kim, the chief architect and developer of the UNB RTK system, and graduate student Luis Serrano. Copyright Questex Media Group Inc Numéro de notice : A2006-418 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28142
in GPS world > vol 17 n° 9 (September 2006) . - pp 58 - 64[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 067-06091 RAB Revue Centre de documentation En réserve L003 Disponible Precise orbit determination for the GRACE mission using only GPS data / Z. Kang in Journal of geodesy, vol 80 n° 6 (September 2006)
PermalinkGPS + LORAN-C: performance analysis of an integrated tracking system / J. Carroll in GPS world, vol 17 n° 7 (July 2006)
PermalinkPermalinkApproximate direct georeferencing in national coordinates / Klaus Legat in ISPRS Journal of photogrammetry and remote sensing, vol 60 n° 4 (June - July 2006)
PermalinkFirst nationalwide high-density GPS RTK network in the Netherlands: geographic expansion possible / M. Van Der Wolk in Geoinformatics, vol 9 n° 4 (01/06/2006)
PermalinkMicro géodésie pour le guidage de coffrage des murs porteurs d'immeubles "tours" / I.R. Sparks in XYZ, n° 107 (juin - août 2006)
PermalinkPermalinkPermalinkPractical satellite navigation: part 4 differential GPS systems and RTK techniques / Huibert-Jan Lekkerkerk in Geoinformatics, vol 9 n° 4 (01/06/2006)
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