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Serve the World, benefit mankind: a system matures / Chengqi Ran in GPS world, vol 24 n° 12 (December 2013)
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Titre : Serve the World, benefit mankind: a system matures Type de document : Article/Communication Auteurs : Chengqi Ran, Auteur Année de publication : 2013 Article en page(s) : pp 34 - 35 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement
[Termes IGN] Asie (géographie physique)
[Termes IGN] BeiDou
[Termes IGN] constellation BeiDou
[Termes IGN] signal BeiDou
[Termes IGN] système d'extensionRésumé : (Documentaliste) L'auteur présente le système de navigation chinois BeiDou, les perspectives futures et la coopération au positionnement par GNSS. Numéro de notice : A2013-646 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans En ligne : http://gpsworld.com/directions-2014-serve-the-world-benefit-mankind-a-system-mat [...] Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32782
in GPS world > vol 24 n° 12 (December 2013) . - pp 34 - 35[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 067-2013121 RAB Revue Centre de documentation En réserve L003 Disponible Singular spectrum analysis for modeling seasonal signals from GPS time series / Q. Chen in Journal of geodynamics, vol 72 (December 2013)
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Titre : Singular spectrum analysis for modeling seasonal signals from GPS time series Type de document : Article/Communication Auteurs : Q. Chen, Auteur ; Tonie M. van Dam, Auteur ; Nico Sneeuw, Auteur ; Xavier Collilieux , Auteur ; M. Weigelt, Auteur ; Paul Rebischung
, Auteur
Année de publication : 2013 Article en page(s) : pp 25 - 35 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] analyse spectrale
[Termes IGN] compensation par moindres carrés
[Termes IGN] filtre de Kalman
[Termes IGN] matrice de covariance
[Termes IGN] série temporelle
[Termes IGN] signal GPS
[Termes IGN] variation saisonnière
[Vedettes matières IGN] Traitement de données GNSSRésumé : (auteur) Seasonal signals in GPS time series are of great importance for understanding the evolution of regional mass fluctuations, i.e., ice, hydrology, and ocean mass. Conventionally these signals (quasi-annual and semi-annual signals) are modeled by least-squares fitting harmonic terms with a constant amplitude and phase. In reality, however, such seasonal signals are modulated, i.e., they will have a time-variable amplitude and phase. Recently, Davis et al. (2012) proposed a Kalman filter based approach to capture the stochastic seasonal behavior of geodetic time series. Singular Spectrum Analysis (SSA) is a non-parametric method, which uses time domain data to extract information from short and noisy time series without a priori knowledge of the dynamics affecting the time series. A prominent benefit is that trends obtained in this way are not necessarily linear. Further, true oscillations can be amplitude and phase modulated. In this work, we will assess the value of SSA for extracting time-variable seasonal signals from GPS time series. We compare our SSA-based results to those obtained using (1) least-squares analysis and (2) Kalman filtering. Our results demonstrate that SSA is a viable and complementary tool for extracting modulated oscillations from GPS time series. Numéro de notice : A2013-512 Affiliation des auteurs : LASTIG LAREG+Ext (2012-mi2018) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.jog.2013.05.005 Date de publication en ligne : 28/06/2013 En ligne : http://dx.doi.org/10.1016/j.jog.2013.05.005 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80232
in Journal of geodynamics > vol 72 (December 2013) . - pp 25 - 35[article]Subseasonal GNSS positioning errors / Jim Ray in Geophysical research letters, vol 40 n° 22 (November 2013)
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Titre : Subseasonal GNSS positioning errors Type de document : Article/Communication Auteurs : Jim Ray, Auteur ; Jake Griffiths, Auteur ; Xavier Collilieux , Auteur ; Paul Rebischung
, Auteur
Année de publication : 2013 Article en page(s) : pp 5854 - 5860 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] bruit rose
[Termes IGN] coordonnées GNSS
[Termes IGN] crénelage
[Termes IGN] données GLONASS
[Termes IGN] élément d'orientation externe
[Termes IGN] variation saisonnière
[Vedettes matières IGN] Traitement de données GNSSRésumé : (auteur) Global Navigation Satellite System (GNSS) station coordinate errors over seasonal and longer time scales are known to be spatially and temporally correlated with flicker noise spectra. Overlaying this are strong annual and semiannual variations that cannot be explained by any single phenomenon. Next most prominent are harmonics of the GPS draconitic year with periods of (351.4/N) days. One explanation is that errors in the standard model for Earth orientation parameter (EOP) tidal variations near 12 and 24 h periods are absorbed into the resonant GPS orbit and daily EOP estimates, resulting mainly in draconitic and fortnightly alias signatures for 24 h product sampling. With the change in International GNSS Service (IGS) station coordinates from weekly to daily resolution in August 2012, it is now possible to study subseasonal performance. All IGS Analysis Centers (ACs) show fortnightly signals, but the resolution will not be sufficient to distinguish direct from aliased subdaily tidal error sources till two more years of data are available. Nevertheless, aliased errors from the subdaily EOP tide model are expected. All but one of the ACs that includes GLONASS data have signals at ~8 day periods, the ground repeat period for GLONASS orbits. This most likely arises from larger geographically correlated orbit errors for GLONASS. Two ACs possess unique short-period features that appear to be caused by peculiarities of their analysis strategies. Numéro de notice : A2013-795 Affiliation des auteurs : LASTIG LAREG+Ext (2012-mi2018) Thématique : POSITIONNEMENT Nature : Article DOI : 10.1002/2013GL058160 Date de publication en ligne : 08/11/2013 En ligne : http://dx.doi.org/10.1002/2013GL058160 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80235
in Geophysical research letters > vol 40 n° 22 (November 2013) . - pp 5854 - 5860[article]Documents numériques
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Subseasonal GNSS Positionning ErrorsAdobe Acrobat PDFHunting for GNSS echoes: analysis of signal tracking techniques for multipath mitigation / Antonio Fernandez in GPS world, vol 24 n° 11 (November 2013)
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Titre : Hunting for GNSS echoes: analysis of signal tracking techniques for multipath mitigation Type de document : Article/Communication Auteurs : Antonio Fernandez, Auteur ; Mariano Wis, Auteur ; et al., Auteur Année de publication : 2013 Article en page(s) : pp 44 - 50 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement du signal
[Termes IGN] correction du trajet multiple
[Termes IGN] signal GNSS
[Termes IGN] traitement de données GNSS
[Termes IGN] trajet multipleRésumé : (Editeur) [...] The team of researchers involved with ARTEMISA describe their efforts to generate synthetic multipath for GPS L1 and Galileo E1 signals and to test different signal tracking techniques in a simulated receiver to see which techniques best minimize the effects of multipath on positioning solutions and which might be feasible candidates for incorporating in real receivers. The hunt is on. Numéro de notice : A2013-585 Affiliation des auteurs : non IGN Thématique : IMAGERIE/POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32721
in GPS world > vol 24 n° 11 (November 2013) . - pp 44 - 50[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 067-2013111 RAB Revue Centre de documentation En réserve L003 Disponible New structure for GLONASS nav message / Alexander Povalyaev in GPS world, vol 24 n° 11 (November 2013)
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Titre : New structure for GLONASS nav message Type de document : Article/Communication Auteurs : Alexander Povalyaev, Auteur Année de publication : 2013 Article en page(s) : pp 36 - 38 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] code GLONASS
[Termes IGN] constellation GLONASS
[Termes IGN] interopérabilité
[Termes IGN] signal GLONASSRésumé : (Editeur) Russian scientists propose a new code-division multiple-access signal format to be broadcast on a new GLONASS L3 signal. Once implemented across the modernizing GLONASS constellation, this will facilitate interoperability with - and eventually interchangeability among - other GNSS signals. The flexible message format permits relatively easy upgrades in the navigation message, if required. Numéro de notice : A2013-583 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32719
in GPS world > vol 24 n° 11 (November 2013) . - pp 36 - 38[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 067-2013111 RAB Revue Centre de documentation En réserve L003 Disponible Urban positioning on a smartphone: real-time shadow matching using GNSS and 3D city models / Lei Wang in Inside GNSS, vol 8 n° 6 (November - December 2013)
PermalinkMonitoring precipitable water vapor in real-time using global navigation satellite systems / Seung-Woo Lee in Journal of geodesy, vol 87 n° 10-12 (October - December 2013)
PermalinkA reference station-based GNSS computing mode to support unified precise point positioning and real-time kinematic services / Yanming Feng in Journal of geodesy, vol 87 n° 10-12 (October - December 2013)
PermalinkTroposphere delays from space geodetic techniques, water vapor radiometers, and numerical weather models over a series of continuous VLBI campaigns / Kamil Teke in Journal of geodesy, vol 87 n° 10-12 (October - December 2013)
PermalinkAssessing the precision in loading estimates by geodetic techniques in Southern Europe / Pierre Valty in Geophysical journal international, vol 194 n° 3 (September 2013)
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PermalinkCooperative GNSS authentication: reliability from unreliable peers / Liang Heng in Inside GNSS, vol 8 n° 5 (September - October 2013)
PermalinkPermalinkLe système de DORIS et certaines améliorations récentes / Jordane Strittmatter in XYZ, n° 136 (septembre - novembre 2013)
PermalinkAutomated and continual determination of radio telescope reference points with sub-mm accuracy: results from a campaign at the Onsala Space Observatory / Michael Lösler in Journal of geodesy, vol 87 n° 8 (August 2013)
PermalinkImpact of loading displacements on SLR-derived parameters and on the consistency between GNSS and SLR results / Krzysztof Sosnica in Journal of geodesy, vol 87 n° 8 (August 2013)
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