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Estimating ionospheric delay using GPS/Galileo signals in the E5 band / Olivier Julien in Inside GNSS, vol 10 n° 2 (March - April 2015)
[article]
Titre : Estimating ionospheric delay using GPS/Galileo signals in the E5 band Type de document : Article/Communication Auteurs : Olivier Julien, Auteur ; Jean-Luc Issler, Auteur ; Laurent Lestarquit, Auteur ; Lionel Ries, Auteur Année de publication : 2015 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] modèle ionosphérique
[Termes IGN] retard ionosphèrique
[Termes IGN] signal Galileo
[Termes IGN] signal GPS
[Termes IGN] traitement du signalRésumé : (éditeur) Building on previous research efforts, the authors present a novel technique to improve ionospheric modeling using various configurations of GPS and Galileo signals in the E5 band. Numéro de notice : A2015-253 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans En ligne : http://www.insidegnss.com/node/4435 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76293
in Inside GNSS > vol 10 n° 2 (March - April 2015)[article]Levelling co-located GNSS and tide gauge stations using GNSS reflectometry / Alvaro Santamaria Gomez in Journal of geodesy, vol 89 n° 3 (March 2015)
[article]
Titre : Levelling co-located GNSS and tide gauge stations using GNSS reflectometry Type de document : Article/Communication Auteurs : Alvaro Santamaria Gomez, Auteur ; Christopher S. Watson, Auteur ; Médéric Gravelle, Auteur ; et al., Auteur Année de publication : 2015 Article en page(s) : pp 241 - 258 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] analyse comparative
[Termes IGN] erreur systématique
[Termes IGN] étalonnage d'instrument
[Termes IGN] hauteur ellipsoïdale
[Termes IGN] marée océanique
[Termes IGN] marégraphe
[Termes IGN] nivellement
[Termes IGN] point de liaison (géodésie)
[Termes IGN] propagation troposphérique
[Termes IGN] rapport signal sur bruit
[Termes IGN] réflectance de surface
[Termes IGN] réflectométrie par GNSS
[Termes IGN] signal GPSRésumé : (auteur) The GNSS reflectometry technique provides geometric information on the environment surrounding the GNSS antenna including the vertical distance to a reflecting surface. We use sea-surface reflections of GPS signals, recorded as oscillations in signal-to-noise ratio (SNR), to estimate the GNSS to tide gauge (TG) levelling tie, and thus the ellipsoidal heights of the TG. We develop approaches to isolate SNR data dominated by sea-surface reflections and to remove SNR frequency changes caused by the dynamic sea surface. Comparison with in situ levelling at eight sites reveals mean differences at the centimetre level for satellites above 12∘ elevation, with four sites showing differences of 3 cm or smaller. These differences include errors in the in situ levelling, in the antenna calibration model and in the TG measurements, and so represent an upper bound on our technique’s error. Data sampling (1 or 30 s) does not significantly affect the results. We detect systematic errors at the decimetre level related to satellite elevations below 12∘ and to sea-surface height and also differences between results from the L1 and L2 GPS signals larger than 15 cm at two sites. These systematic errors remain unexplained; differences between GPS signals are attributed to receiver-dependent differences in the SNR measurements, while the elevation-dependent error is attributed to unmodelled phase effects such as those caused by tropospheric refraction and sea-surface roughness. Using our approach, we identify a levelling offset of 1.5 cm related to a TG sensor change, illustrating our technique’s value for TG reference monitoring. Numéro de notice : A2015-337 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-014-0784-y Date de publication en ligne : 20/12/2014 En ligne : https://doi.org/10.1007/s00190-014-0784-y Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76705
in Journal of geodesy > vol 89 n° 3 (March 2015) . - pp 241 - 258[article]Accounting for Galileo–GPS inter-system biases in precise satellite positioning / Jacek Paziewski in Journal of geodesy, vol 89 n° 1 (January 2015)
[article]
Titre : Accounting for Galileo–GPS inter-system biases in precise satellite positioning Type de document : Article/Communication Auteurs : Jacek Paziewski, Auteur ; Pawel Wielgosz, Auteur Année de publication : 2015 Article en page(s) : pp 81 - 93 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] acquisition de données
[Termes IGN] analyse comparative
[Termes IGN] données GNSS
[Termes IGN] double différence
[Termes IGN] erreur systématique
[Termes IGN] fusion de données
[Termes IGN] positionnement différentiel
[Termes IGN] signal Galileo
[Termes IGN] signal GPS
[Termes IGN] stabilité dans le tempsRésumé : (auteur) Availability of two overlapping frequencies L1/E1 and L5/E5a of the signals transmitted by GPS and Galileo systems offers the possibility of tightly combining observations from both systems in a single observational model. A tightly combined observational model assumes a single reference satellite for all observations from both Galileo and GPS systems. However, when inter-system double-differenced observations are created, receiver inter-system bias is introduced. This study presents the results and the methodology for estimation and accounting for phase and code GPS-Galileo inter-system bias in precise relative positioning. The research investigates the size and temporal stability of the estimated bias for different receiver pairs as well as examines the influence of accounting for the inter-system bias on the user position solution. The obtained numerical results are based on four experiments carried out at different locations and time periods using both real and simulated GNSS data. Numéro de notice : A2015-329 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-014-0763-3 En ligne : https://doi.org/10.1007/s00190-014-0763-3 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76654
in Journal of geodesy > vol 89 n° 1 (January 2015) . - pp 81 - 93[article]GPS for land surveyors / Jan Van Sickle (2015)
Titre : GPS for land surveyors Type de document : Guide/Manuel Auteurs : Jan Van Sickle, Auteur Mention d'édition : 4ème édition Editeur : Boca Raton, New York, ... : CRC Press Année de publication : 2015 Importance : 349 p. Format : 16 x 24 cm ISBN/ISSN/EAN : 978-1-4665-8310-8 Note générale : Glossaire et bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] coordonnées GPS
[Termes IGN] erreur systématique
[Termes IGN] Global Navigation Satellite System
[Termes IGN] Global Positioning System
[Termes IGN] GPS en mode statique
[Termes IGN] positionnement différentiel
[Termes IGN] positionnement statique
[Termes IGN] récepteur GPS
[Termes IGN] secteur spatial
[Termes IGN] signal GPS
[Termes IGN] système d'extension
[Termes IGN] temps réelIndex. décimale : 30.61 Systèmes de Positionnement par Satellites du GNSS Résumé : (Editeur) For more than a decade, GPS for Land Surveyors has been unique among other books on this topic due to its clear, straightforward treatment of the subject matter. Completely revised and updated, this fourth edition of a perennial bestseller maintains the user-friendly format that made previous editions so popular while addressing changes in hardware, software, and procedures. Neither simplistic nor overly technical, this book introduces the concepts needed to understand and use GPS and Global Navigation Satellite Systems (GNSS). See What’s New in the Fourth Edition: - Up-to-date information on GNSS and GPS modernization, - Changes in hardware, software, and procedures, - Comprehensive treatment of novel signals on new blocks of satellites (L5 and L2C). The book minimizes your reliance on mathematical explanations and maximizes use of illustrations and examples that allow you to visualize and grasp key concepts. The author explains the progression of ideas at the foundation of satellite positioning and delves into some of the particulars. He keeps presentation practical, providing a guide to techniques used in GPS, from their design through observation, processings, real-time kinematic (RTK), and real-time networks. These features and more make it easier for you to meet the challenge of keeping up in this field. Note de contenu :
1. Global Positioning System (GPS) Signal
- GPS Signal Structure
- Two Observables
- Pseudoranging
- Carrier Phase Ranging
2. Biases and Solutions
- Biases
- Receiver Noise
- Solutions
- Summary
3. Framework
- Technological Forerunners
- GPS Segments
- GPS Constellation
4. Receivers and Methods
- Common Features of Global Positioning System (GPS) Receivers
5. Coordinates
- A Few Pertinent Ideas about Geodetic Datums for Global Positioning Systems
- State Plane Coordinates
- Heights
6. Static Global Positioning System Surveying
- Planning
- National Geodetic Survey (NGS) Control
- Control from Continuously Operating Networks
- Static Survey Project Design
- Preparation
- Some GPS Survey Design Facts
- Drawing the Baselines
- Static GPS Control Observations
7. Real-Time Global Positioning System Surveying
- Real-Time Kinematic (RTK) and Differential GPS (DGPS)
- General Idea
- Radial GPS
- DGPS
- Local and Wide Area DGPS
- Geographic Information Systems (GIS) Application
- Integer Cycle Ambiguity Fixing
- Wireless Link
- Vertical Component in RTK
- Some Practical RTK Suggestions
- Real-Time Network Services
- Real-Time GPS Techniques
- Precise Point Positioning (PPP)
8. Global Positioning System Modernization and Global Navigation Satellite System
- Global Positioning System (GPS) Modernization
- Satellite Blocks
- Power Spectral Density Diagrams
- New Signals
- Global Navigation Satellite System (GNSS)
- GLONASS
- Galileo
- Interoperability between GPS, GLONASS, and GALILEO
- BeiDou
- Quasi-Zenith Satellite System (QZSS)
- IRNSS
- The Future
- InteroperabilityNuméro de notice : 22522 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Manuel de cours Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81497 A Realistic and Easy-to-Implement Weighting Model for GPS Phase Observations / Xiaoguang Luo in IEEE Transactions on geoscience and remote sensing, vol 52 n° 10 tome 1 (October 2014)
[article]
Titre : A Realistic and Easy-to-Implement Weighting Model for GPS Phase Observations Type de document : Article/Communication Auteurs : Xiaoguang Luo, Auteur ; M. Mayer, Auteur ; B. Heck, Auteur ; Joseph L. Awange, Auteur Année de publication : 2014 Article en page(s) : pp 6110 - 6118 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] phase GPS
[Termes IGN] pondération
[Termes IGN] rapport signal sur bruit
[Termes IGN] signal GPSRésumé : (Auteur) Observation weighting is an essential component of GPS stochastic modeling and plays a key role in reliable outlier detection and parameter estimation. Nowadays, satellite elevation angle and SNR are used as quality indicators for GPS phase measurements in high-accuracy geodetic applications. In comparison with elevation-dependent models, SNR-based weighting schemes represent the reality better, but usually require greater implementation efforts. Relying upon a representative analysis of empirical SNR-based weights, this paper proposes the elevation-dependent exponential weighting function EXPZ, which benefits from realistic SNR-based weights and enables easy software implementation. To process GPS data from a regional network, this advanced weighting scheme is implemented in the Bernese GPS Software 5.0 and is compared with the conventional elevation-dependent COSZ model in terms of phase ambiguity resolution, troposphere parameter (TRP) estimation, and site coordinate determination. The results show that the proposed EXPZ model significantly attenuates the downweighting effects on low-elevation observations and improves the success rates of ambiguity resolution by about 10%, the standard deviations of site-specific TRPs by about 40%, and the repeatability of daily coordinate estimates by up to 2.3 mm (50%). Numéro de notice : A2014-481 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2013.2294946 En ligne : https://doi.org/10.1109/TGRS.2013.2294946 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=74063
in IEEE Transactions on geoscience and remote sensing > vol 52 n° 10 tome 1 (October 2014) . - pp 6110 - 6118[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 065-2014101A RAB Revue Centre de documentation En réserve L003 Disponible Empirical modelling of site-specific errors in continuous GPS data / Michael Moore in Journal of geodesy, vol 88 n° 9 (September 2014)PermalinkSingle frequency GPS/Galileo precise point positioning using un-differenced and between-satellite single difference measurements / Akram Afifi in Geomatica, vol 68 n° 3 (September 2014)PermalinkGround-based augmentation: Combining Galileo with GPS and Glonass? / Mirko Stanisak in GPS world, vol 25 n° 4 (April 2014)PermalinkImproved one/multi-parameter models that consider seasonal and geographic variations for estimating weighted mean temperature in ground-based GPS meteorology / Yi Bin Yao in Journal of geodesy, vol 88 n° 3 (March 2014)PermalinkWater vapor probabilistic retrieval using GNSS signals / Andrea Antonini in IEEE Transactions on geoscience and remote sensing, vol 52 n° 3 (March 2014)PermalinkIonospheric modeling using GPS: Greater fidelity using a 3D approach / Wei Zhang in GPS world, vol 25 n° 2 (February 2014)PermalinkCycle slips: Detection and correction using inertial aiding / Malek O. Karaim in GPS world, vol 25 n° 1 (January 2014)PermalinkPermalinkPrincipe de fonctionnement d'un géonavigateur / Serge Botton in XYZ, n° 137 (décembre 2013 - février 2014)PermalinkSingular spectrum analysis for modeling seasonal signals from GPS time series / Q. Chen in Journal of geodynamics, vol 72 (December 2013)Permalink