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Auteur Peter Spanik |
Documents disponibles écrits par cet auteur (2)
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Multipath detection with the combination of SNR measurements – Example from urban environment / Peter Spanik in Geodesy and cartography, vol 66 n° 2 (December 2017)
[article]
Titre : Multipath detection with the combination of SNR measurements – Example from urban environment Type de document : Article/Communication Auteurs : Peter Spanik, Auteur ; Jan Hefty, Auteur Année de publication : 2017 Article en page(s) : pp 305 - 316 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement
[Termes IGN] données Galileo
[Termes IGN] données GLONASS
[Termes IGN] données GPS
[Termes IGN] mesurage de phase
[Termes IGN] milieu urbain
[Termes IGN] rapport signal sur bruit
[Termes IGN] trajet multipleRésumé : (auteur) Multipath is one of the most severe station-dependent error sources in both static and kinematic positioning. Relatively new and simple detection technique using the Signal-to-Noise (SNR) measurements on three frequencies will be presented based on idea of Strode and Groves. Exploitation of SNR measurements is beneficial especially for their unambiguous character. Method is based on the fact that SNR values are closely linked with estimation of pseudo-ranges and phase measurements during signal correlation processing. Due to this connection, combination of SNR values can be used to detect anomalous behavior in received signal, however some kind of calibration in low multipath environment has to be done previously. In case of multipath, phase measurements on different frequencies will not be affected in the same manner. Specular multipath, e.g. from building wall introduces additional path delay which is interpreted differently on each of the used carrier, due to different wavelengths. Experimental results of multipath detection in urban environment will be presented. Originally proposed method is designed to work with three different frequencies in each epoch, thus only utilization of GPS Block II-F and Galileo satellites is possible. Simplification of detection statistics to use only two frequencies is made and results using GPS and GLONASS systems are presented along with results obtained using original formula. Numéro de notice : A2017-789 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1515/geocart-2017-0020 En ligne : https://doi.org/10.1515/geocart-2017-0020 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=89101
in Geodesy and cartography > vol 66 n° 2 (December 2017) . - pp 305 - 316[article]Short-term and long-term variability of antenna position due to thermal bending of pillar monument at permanent GNSS station / Lubomira Gerhatova in Reports on geodesy and geoinformatics, vol 100 (May 2016)
[article]
Titre : Short-term and long-term variability of antenna position due to thermal bending of pillar monument at permanent GNSS station Type de document : Article/Communication Auteurs : Lubomira Gerhatova, Auteur ; Jan Hefty, Auteur ; Peter Spanik, Auteur Année de publication : 2016 Article en page(s) : pp 67 - 77 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] antenne GNSS
[Termes IGN] coordonnées GNSS
[Termes IGN] station permanente
[Termes IGN] variabilitéRésumé : (Auteur) The variability of daily site coordinates at permanent GNSS station is a sum of many disturbing factors influencing the actual satellite observations, data processing, and bias modelling. In the paper are analysed possibilities of monitoring the instability of GNSS antenna pillar monument by the independent observations using the precise inclination sensor. Long-term series from three different types of pillars show specific features in amplitude and temporal evolution of monument bending. Correlations with daily temperature and/or solar radiation changes were proved. Numéro de notice : A2016-647 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1515/rgg-2016-0007 En ligne : http://dx.doi.org/10.1515/rgg-2016-0007 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81853
in Reports on geodesy and geoinformatics > vol 100 (May 2016) . - pp 67 - 77[article]