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Single-frequency precise point positioning: an analytical approach / Oskar Sterle in Journal of geodesy, vol 89 n° 8 (August 2015)
[article]
Titre : Single-frequency precise point positioning: an analytical approach Type de document : Article/Communication Auteurs : Oskar Sterle, Auteur ; Bojan Stopar, Auteur ; Polona Pavlovčič Prešeren, Auteur Année de publication : 2015 Article en page(s) : pp 793-810 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] analyse comparative
[Termes IGN] analyse de données
[Termes IGN] coordonnées géographiques
[Termes IGN] horloge
[Termes IGN] positionnement ponctuel précis
[Termes IGN] propagation troposphérique
[Termes IGN] récepteur monofréquence
[Termes IGN] station permanente
[Termes IGN] transformation de Helmert
[Vedettes matières IGN] Traitement de données GNSSRésumé : (auteur) An analytical approach to single-frequency precise point positioning (PPP) is discussed in this paper. To obtain highest precision results, all biases must be eliminated or modelled to centimetre level. The use of the GRAPHIC ionosphere-free linear combination that is based on single-frequency phase and code observations eliminates the ionosphere bias; however, the rank deficient Gauss–Markov model is obtained. We explicitly determine rank deficiency of a Gauss–Markov model as a number of all ambiguity clusters, each of them defined as a set of all ambiguities overlapping in time. On the basis of S-transformation we prove that the single-frequency PPP represents an unbiased estimator for station coordinates and troposphere parameters, while it presents a biased estimator for ambiguities and receiver-clock error parameters. Additionally we describe the estimable parameters in each ambiguity cluster as the differences between ambiguity parameters and the sum of receiver-clock parameters with one of the ambiguities. We also show that any other particular solution on the basis of S-transformation is obtained only when the common least-squares estimation in single step is applied. The recursive least-squares estimation with parameter pre-elimination only determines the vector of unknowns as possible to transform through S-transformation, whereas the same does not hold for the cofactor matrix of unknowns. For a case study, we present our method on GPS data from 19 permanent stations (14 IGS and 5 EPN) in Europe, for 89 consecutive days in the beginning of 2013. The static case study revealed the precision of daily coordinates as 7.6, 11.7 and 19.6 mm for N, E and U, respectively. The accuracies of the N, E and U components were determined as 6.9, 13.5 and 31.4 mm, respectively, and were calculated using the Helmert transformation of weighted-mean daily single-frequency PPP and IGb08 coordinates. The estimated convergence times were relatively diverse, expanding from 1.75 h (CAGL) to 5.25 h (GRAZ) for the horizontal position with the 10-cm precision threshold, and from 1.00 h (GRAS) to 3.25 h (BZRG) for the height component with a 20-cm precision threshold. The convergence times were shown to be strongly correlated to the remaining unmodelled biases in the GRAPHIC linear combination, primarily with multipath, where the correlation coefficient for the horizontal position was determined as ρP = 0.68 and for height as ρU = 0.85. The comparison to the model where raw observations are used (C, L) and where the ionosphere bias is mitigated with global ionosphere models (GIM) revealed the supremacy of the proposed single-frequency PPP method based on the GRAPHIC linear combination in both the static and the semi-kinematic case study. In the static case study, the proposed single-frequency PPP model was superior both in terms of precision and accuracy. In the semi-kinematic case study, the usage of raw observations with GIM would improve results only when multipath and noise of code observations would prevail over the remaining ionosphere bias, i.e. after applying GIM. Numéro de notice : A2015-377 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-015-0816-2 Date de publication en ligne : 29/04/2015 En ligne : https://doi.org/10.1007/s00190-015-0816-2 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76855
in Journal of geodesy > vol 89 n° 8 (August 2015) . - pp 793-810[article]The mixed-receiver BeiDou inter-satellite-type bias and its impact on RTK positioning / Nandakumaran Nadarajah in GPS solutions, vol 19 n° 3 (July 2015)
[article]
Titre : The mixed-receiver BeiDou inter-satellite-type bias and its impact on RTK positioning Type de document : Article/Communication Auteurs : Nandakumaran Nadarajah, Auteur ; Peter J.G. Teunissen, Auteur ; Jean-Marie Sleewaegen, Auteur ; Oliver Montenbruck, Auteur Année de publication : 2015 Article en page(s) : pp 357 - 368 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement
[Termes IGN] erreur systématique
[Termes IGN] positionnement cinématique en temps réel
[Termes IGN] récepteur mixte
[Termes IGN] récepteur monofréquence
[Termes IGN] résolution d'ambiguïté
[Termes IGN] signal BeiDouRésumé : (Auteur) The inter-satellite-type bias (ISTB) is a receiver-dependent hardware delay/bias between different satellite types. Our recent research revealed the existence of nonzero mixed-receiver phase ISTBs for the Chinese BeiDou system. Triggered by this finding, global navigation satellite system receiver manufactures, who are in the early stage of BeiDou-enabled receiver developments, are working toward a mutually consistent measurement extraction procedure. We analyze the long-term stability and current status of the mixed-receiver ISTBs, as well as study their impact on BeiDou stand-alone real-time kinematic (RTK) positioning. Our results confirm that a recent update in one of the receiver types has aligned it with one of the other receiver types. However, since not all receiver types are aligned yet, nonzero mixed-receiver ISTBs are shown to be still present. Analyses of BeiDou stand-alone RTK positioning using mixed-receiver types demonstrate that ISTBs could seriously affect the integer ambiguity resolution performance and that a priori correction for these biases will dramatically improve the success rate. Our analyses using real data from three different receiver types also demonstrate the long-term stability of the ISTBs, thus showing that such a priori calibration is indeed possible. Numéro de notice : A2015-460 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1007/s10291-014-0392-6 Date de publication en ligne : 28/06/2014 En ligne : https://doi.org/10.1007/s10291-014-0392-6 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=77130
in GPS solutions > vol 19 n° 3 (July 2015) . - pp 357 - 368[article]Assessment of high-rate GPS using a single-axis shake table / Simon Häberling in Journal of geodesy, vol 89 n° 7 (July 2015)
[article]
Titre : Assessment of high-rate GPS using a single-axis shake table Type de document : Article/Communication Auteurs : Simon Häberling, Auteur ; Markus Rothacher, Auteur ; Y. Zhang, Auteur Année de publication : 2015 Article en page(s) : pp 697 - 709 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] antenne GNSS
[Termes IGN] bruit thermique
[Termes IGN] phase
[Termes IGN] réalité de terrain
[Termes IGN] récepteur GNSS
[Termes IGN] sismographeRésumé : (auteur) The developments in GNSS receiver and antenna technologies, especially the increased sampling rate up to 100 sps, open up the possibility to measure high-rate earthquake ground motions with GNSS. In this paper we focus on the GPS errors in the frequency band above 1 Hz. The dominant error sources are mainly the carrier phase jitter caused by thermal noise and the stress error caused by the dynamics, e.g. antenna motions. To generate a large set of different motions, we used a single-axis shake table, where a GNSS antenna and a strong motion seismometer were mounted with a well-known ground truth. The generated motions were recorded with three different GNSS receivers with sampling rates up to 100 sps and different receiver baseband parameters. The baseband parameters directly dictate the carrier phase jitter and the correlations between subsequent epochs. A narrow loop filter bandwidth keeps the carrier phase jitter on a low level, but has an extreme impact on the receiver response for motions above 1 Hz. The amplitudes above 3 Hz are overestimated up to 50 % or reduced by well over half. The corresponding phase errors are between 30 and 90 degrees. Compared to the GNSS receiver response, the strong motion seismometer measurements do not show any amplitude or phase variations for the frequency range from 1 to 20 Hz. Due to the large errors for dynamic GNSS measurements, it is essential to account for the baseband parameters of the GNSS receivers if high-rate GNSS is to become a valuable tool for seismic displacement measurements above 1 Hz. Fortunately, the receiver response can be corrected by an inverse filter if the baseband parameters are known. Numéro de notice : A2015-356 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-015-0808-2 En ligne : https://doi.org/10.1007/s00190-015-0808-2 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76782
in Journal of geodesy > vol 89 n° 7 (July 2015) . - pp 697 - 709[article]Street smart: 3-D city mapping and modeling for positioning with multi-GNSS / Li-Ta Hsu in GPS world, vol 26 n° 7 (July 2015)
[article]
Titre : Street smart: 3-D city mapping and modeling for positioning with multi-GNSS Type de document : Article/Communication Auteurs : Li-Ta Hsu, Auteur ; Shunsuke Miura, Auteur ; Shunsuke Kamijo, Auteur Année de publication : 2015 Article en page(s) : pp 36 - 43 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement
[Termes IGN] canyon urbain
[Termes IGN] coordonnées géographiques
[Termes IGN] GNSS assisté pour la navigation
[Termes IGN] modèle géométrique du bâti
[Termes IGN] navigation pédestre
[Termes IGN] positionnement par GNSS
[Termes IGN] Quasi-Zenith Satellite System
[Termes IGN] récepteur monofréquence
[Termes IGN] réflexion spéculaire
[Termes IGN] signal GLONASS
[Termes IGN] signal GPS
[Termes IGN] traitement du signal
[Termes IGN] trajet multipleRésumé : (Auteur) A particle-filter positioning method using a 3D map to rectify the errors created by multipath and non-line-of-sight signals on the positioning result delivered by a low-cost single-frequency GPS receiver takes a multi-GNSS approach, using the combined signals of GPS, GLONASS and QZSS. The method outperforms conventional positioning in availablility and positioning accuracy. It wil likely fused with other sensors in a future pedestrian navigation application. Numéro de notice : A2015-308 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans En ligne : http://gpsworld.com/street-smart-3d-city-mapping-and-modeling-for-positioning-wi [...] Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76532
in GPS world > vol 26 n° 7 (July 2015) . - pp 36 - 43[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 067-2015071 RAB Revue Centre de documentation En réserve L003 Disponible An improved between-satellite single-difference precise point positioning model for combined GPS/Galileo observations / Akram Afifi in Journal of applied geodesy, vol 9 n° 2 (June 2015)
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Titre : An improved between-satellite single-difference precise point positioning model for combined GPS/Galileo observations Type de document : Article/Communication Auteurs : Akram Afifi, Auteur ; Ahmed El-Rabbany, Auteur Année de publication : 2015 Article en page(s) : pp 101 - 111 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] combinaison linéaire
[Termes IGN] données Galileo
[Termes IGN] données GPS
[Termes IGN] positionnement ponctuel précis
[Termes IGN] récepteur bifréquence
[Termes IGN] simple différence
[Termes IGN] temps de convergence
[Vedettes matières IGN] Traitement de données GNSSRésumé : (auteur) This article introduces a new model for precise point positioning (PPP), which combines dual-frequency GPS and Galileo observations. Our model is based on the between-satellite single-difference (BSSD) linear combination, which cancels out some receiver-related biases, including receiver clock error and non-zero initial phase bias of the receiver’s oscillator. Two different scenarios are considered when forming BSSD linear combinations. In the first scenario, either a GPS or a Galileo satellite is selected as a reference for both GPS and Galileo observables. The second scenario, on the other hand, selects two reference satellites: a GPS reference satellite for the GPS observables and a Galileo satellite for the Galileo observables. Natural Resources Canada’s GPSPace PPP software is modified to enable a combined GPS/Galileo PPP solution and to handle the newly introduced biases. A total of 12 data sets representing two-day GPS/Galileo measurements at six IGS stations are processed to verify the developed PPP model. Precise satellite orbit and clock products from the IGS-MGEX network are used to correct both of the GPS and Galileo measurements. It is shown that using one reference satellite to form the BSSD linear combinations improves the precision of the estimated parameters by about 25 % compared with the GPS-only PPP solution. When two reference satellites are used, however, the precision of the estimated parameters improves by about 50 % compared with the GPS-only PPP solution. Additionally, the solution convergence time is reduced to 10 min for both BSSD scenarios, which represents about 50 % improvement in comparison with the GPS-only PPP solution. Numéro de notice : A2015-472 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1515/jag-2014-0030 En ligne : http://www.degruyter.com/view/j/jag.2014.9.issue-2/jag-2014-0030/jag-2014-0030.x [...] Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=77176
in Journal of applied geodesy > vol 9 n° 2 (June 2015) . - pp 101 - 111[article]Analysis of orbital configurations for geocenter determination with GPS and low-Earth orbiters / Da Kuang in Journal of geodesy, vol 89 n° 5 (May 2015)PermalinkIrregular variations in GPS time series by probability and noise analysis / Anna Klos in Survey review, vol 47 n° 342 (May 2015)PermalinkLow-cost GPS sensors for deformation monitoring / Lionel Benoit in GIM international, vol 29 n° 4 (April 2015)PermalinkHow does a GNSS receiver estimate velocity? / Salvatore Gaglione in Inside GNSS, vol 10 n° 2 (March - April 2015)PermalinkEvolution du socle de données 3D de la métropole de Lyon / Manuel Plane in XYZ, n° 142 (mars - mai 2015)PermalinkPython GNSS receiver: An object-oriented software platform suitable for multiple receivers / Eliot Wycoff in GPS world, vol 26 n° 2 (February 2015)PermalinkReal-time high-precision earthquake monitoring using single-frequency GPS receivers / Min Li in GPS solutions, vol 19 n° 1 (January 2015)PermalinkExterior orientation of hyperspectral frame images collected with UAV for forest applications / Adilson Berveglieri (2015)PermalinkGéodésie multi-technique pour la surveillance haute fréquence de glissements de terrains / Pierre Boetzle (2015)PermalinkGPS for land surveyors / Jan Van Sickle (2015)Permalink