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The influence of application a simplified transformation model between reference frames ECEF and ECI onto prediction accuracy of position and velocity of GLONASS satellites / Robert Krzyzek in Reports on geodesy and geoinformatics, vol 99 (December 2015)  

Public [article]  inReports on geodesy and geoinformatics > vol 99 (December 2015) . - pp 19 - 27 Titre : The influence of application a simplified transformation model between reference frames ECEF and ECI onto prediction accuracy of position and velocity of GLONASS satellites Type de document : Article/Communication Auteurs : Robert Krzyzek, Auteur ; Bogdan Skorupa, Auteur Année de publication : 2015 Article en page(s) : pp 19 - 27 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes descripteurs IGN] constellation GLONASS [Termes descripteurs IGN] éphémérides de satellite [Termes descripteurs IGN] orbitographie [Termes descripteurs IGN] position [Termes descripteurs IGN] prédiction [Termes descripteurs IGN] système de référence géodésique [Termes descripteurs IGN] transformation de coordonnées Résumé : (auteur) In computational tasks of satellite geodesy there is a need for transformation of coordinates between reference frames ECEF – Earth Centered, Earth Fixed and ECI – Earth Centered, Inertial. Strict and simplified transformation models, which can be used in case of the position and velocity short-term predictions of GLONASS satellites, have been presented in this study. Comparison of the results of state vector components predictions of the GLONASS satellites, in dependence of the used transformation model, have also been presented. Accuracy of the prediction has been determined on the basis of the analyse of deviations of the predicted positions and velocities of GLONASS satellites from their values given in broadcast ephemeris. Numéro de notice : A2015--021 Thématique : POSITIONNEMENT Nature : Article En ligne : http://www.degruyter.com/view/j/rgg.2015.99.issue-1/rgg-2015-0009/rgg-2015-0009. [...] Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80845 [article]

Precision analysis of Trimble Rtx surveying technology with Xfill function in the context of obtained conversion observations / Robert Krzyzek in Reports on geodesy and geoinformatics, vol 97 (December 2014)  

Public [article]  inReports on geodesy and geoinformatics > vol 97 (December 2014) . - pp 47 - 70 Titre : Precision analysis of Trimble Rtx surveying technology with Xfill function in the context of obtained conversion observations Type de document : Article/Communication Auteurs : Robert Krzyzek, Auteur Année de publication : 2015 Article en page(s) : pp 47 - 70 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Topographie [Termes descripteurs IGN] conversion de données [Termes descripteurs IGN] GPS en mode cinématique [Termes descripteurs IGN] positionnement cinématique en temps réel [Termes descripteurs IGN] transformation de coordonnées Résumé : (auteur) As a result of traditional geodetic surveying we usually achieve observations which are then used for calculating rectangular coordinates onto a plane along with precision evaluation. In this article the surveying methods are presented in which the situation is different. Test measurements were carried out, consisting in the measurement of a fragment of detailed control network in RTK (Real Time Kinematic) and RTX (Real Time Extended) mode with xFill function. First, the rectangular coordinates onto a plane (through the transformation of data ellipsoidal) were obtained, on the basis of which the conversion observations were determined and they were compared with each other, as well as with reference parameters - conversion observations out of detailed control network adjustment with use of the method of least squares. The results of the study allow to verify the precision and application possibilities of conversion observations obtained thanks to Trimble RTX technology with xFill function. Application of this surveying method in typical geodetic tasks is fully justifiable. Nevertheless, it is recommendable to be aware of the correlations of absolute or relative values obtained in RTX procedure to reference parameters, which in turn will enable conclusive verification of the possibilities of Trimble RTX technology application in certain geodetic surveys. Numéro de notice : A2014-700 Thématique : POSITIONNEMENT Nature : Article En ligne : http://www.degruyter.com/view/j/rgg.2014.97.issue-1/rgg-2014-0011/rgg-2014-0011. [...] Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=75405 [article]

Modernization of the method of line-line intersection using RTN GNSS technology for determining the position of corners of buildings / Robert Krzyzek in Artificial satellites, vol 50 n° 1 (March 2015)  

Public [article]  inArtificial satellites > vol 50 n° 1 (March 2015) . - pp 41 - 58 Titre : Modernization of the method of line-line intersection using RTN GNSS technology for determining the position of corners of buildings Type de document : Article/Communication Auteurs : Robert Krzyzek, Auteur Année de publication : 2015 Article en page(s) : pp 41 - 58 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Topographie [Termes descripteurs IGN] angle [Termes descripteurs IGN] bâtiment [Termes descripteurs IGN] intersection de ligne Résumé : (auteur) Carrying out measurements of buildings with RTN GNSS technology in difficult environmental conditions appears to be a major challenge for many surveyors. Achieving the required accuracy of the position of a building structure is often a difficult, and sometimes even an impossible task to perform. This paper presents an innovative solution to increase the reliability of determining the coordinates of building corners, by modernizing the results obtained from the indirect method of measurement of line-line intersection by the socalled half-angle method. Generally speaking, the half-angle method is to verify the angular values in determined points (corners of buildings) from the method of intersection of the base point lines. Optimization of this method involves reducing deformation of a building, which has been determined in real time, taking into account only the classical method of line-line intersection. In order to obtain optimized measurement results, the conversion of the obtained results to the convergent values relative to the most probable coordinates is performed. Based on a detailed comparative and statistical analyses, it can be concluded that the modernized method of line intersection, employed in the RTN GNSS mode with the half-angle method, greatly improves the reliability of determining corners of buildings (X and Y coordinates), as well as provides an exact reflection of the geometric shape of a structure. Numéro de notice : A2015-288 Thématique : POSITIONNEMENT Nature : Article En ligne : http://www.degruyter.com/view/j/arsa.2015.50.issue-1/arsa-2015-0004/arsa-2015-00 [...] Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76407 [article]

Reliability analysis of the results of RTN GNSS surveys of building structures using indirect methods of measurement / Robert Krzyzek in Geodesy and cartography, vol 63 n° 2 (December 2014) 

Public [article]  inGeodesy and cartography > vol 63 n° 2 (December 2014) . - pp 161 - 181 Titre : Reliability analysis of the results of RTN GNSS surveys of building structures using indirect methods of measurement Type de document : Article/Communication Auteurs : Robert Krzyzek, Auteur Année de publication : 2014 Article en page(s) : pp 161 - 181 Langues : Français (fre) Descripteur : [Vedettes matières IGN] Navigation et positionnement [Termes descripteurs IGN] bâtiment [Termes descripteurs IGN] fiabilité des données [Termes descripteurs IGN] point de liaison (géodésie) [Termes descripteurs IGN] positionnement par GNSS Résumé : (auteur) This paper presents accuracy characteristics of determining the position of corners of building structures with RTN GNSS surveying, using indirect methods of measurement. The studies included the following methods: a point on a straight line, intersection of straight lines and distance-distance intersection. The research experiment analyzed the coordinates of the corners of building structures obtained from the surveys and the mean errors of their position as well as mutual relationships of check measurements, or tie distances. The accuracy analysis also took into account base errors determined in real time. Statistical analysis of these parameters was carried out, as a result of which a distance-distance intersection method was very well rated. For other methods, the results were diversifi ed. The article also emphasizes a need to search for other solutions to modernize the indirect methods of measurement in such a way that their use in RTN GNSS surveys would give results most probable when compared to the real ones. Numéro de notice : A2014-743 Thématique : POSITIONNEMENT Nature : Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=75786 [article]

Documents numériques

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