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Ambiguity resolution for triple-frequency geometry-free and ionosphere-free combination tested with real data / K. Wang in Journal of geodesy, vol 87 n° 6 (June 2013)
[article]
Titre : Ambiguity resolution for triple-frequency geometry-free and ionosphere-free combination tested with real data Type de document : Article/Communication Auteurs : K. Wang, Auteur ; Markus Rothacher, Auteur Année de publication : 2013 Article en page(s) : pp 539 - 553 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] combinaison linéaire
[Termes IGN] filtrage du bruit
[Termes IGN] mesurage de la fréquence
[Termes IGN] phase GNSS
[Termes IGN] résolution d'ambiguïté
[Termes IGN] signal BeiDou
[Termes IGN] signal Galileo
[Termes IGN] signal GNSSRésumé : (Auteur) The recent GPS Block IIF satellites SVN62 and SVN63 and the Galileo satellites GIOVE-A, GIOVE-B, PFM and FM2 already send signals on more than two frequencies, and more GNSS satellites will provide tracking data on at least three frequencies in the near future. In this paper, a simplified general method for ambiguity resolution minimizing the noise level for the triple-frequency geometry-free (GF) and ionosphere-free (IF) linear combinations is presented, where differently scaled code noise on the three frequencies was introduced. For the third of three required linear combinations, the most demanding one in triple-frequency ambiguity resolution, we developed a general method using the ambiguity-corrected phase observations without any constraints to search for the optimal GF and IF linear combination. We analytically demonstrate that the noise level of this third linear combination only depends on the three frequencies. The investigation concerning this frequency-dependent noise factor was performed for GPS, Galileo and Compass frequency triplets. We verified the theoretical derivations with real triple-frequency GPS and Galileo data from the Multi-GNSS Experiment (M–GEX) of the International GNSS Service (IGS). The data of about 30 M–GEX stations around the world over 11 days from 29 April 2012 to 9 May 2012 were used for the test. For the third linear combinaton using Galileo E1, E5b and E5a, which is expected to have the worst performance among all the GNSS frequency triplets in our investigation, the formal errors of the estimated ambiguities are in most cases below 0.2 cycles after 400 observation epochs. If more GPS satellites sending signals on three frequencies or more stations tracking Galileo E6 signal are available in the future, an improvement by a factor of two to three can be expected. Numéro de notice : A2013-339 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-013-0630-7 Date de publication en ligne : 09/04/2013 En ligne : https://doi.org/10.1007/s00190-013-0630-7 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32477
in Journal of geodesy > vol 87 n° 6 (June 2013) . - pp 539 - 553[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 266-2013061 SL Revue Centre de documentation Revues en salle Disponible Generating distorded GNSS signals using a signal simulator / Mathieu Raimondi in GPS world, vol 24 n° 5 (May 2013)
[article]
Titre : Generating distorded GNSS signals using a signal simulator Type de document : Article/Communication Auteurs : Mathieu Raimondi, Auteur ; Eric Sénant, Auteur ; Charles Fernet, Auteur ; et al., Auteur Année de publication : 2013 Article en page(s) : pp 45 - 50 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] forme d'onde
[Termes IGN] positionnement par GNSS
[Termes IGN] signal Galileo
[Termes IGN] signal GPS
[Termes IGN] simulation de signalRésumé : (Auteur) INTEGRITY. It is one of the most desirable personality traits. It is the characteristic of truth and fair dealing, of honesty and sincerity. The word also can be applied to systems and actions with a meaning of soundness or being whole or undivided. This latter definition is clear when we consider that the word integrity comes from the Latin word integer, meaning untouched, intact, entire the same origin as that for the integers in mathematics: whole numbers without a fractional or decimal component. Integrity is perhaps the most important requirement of any navigation system (along with accuracy, availability, and continuity). It characterizes a system's ability to provide a timely warning when it fails to meet its stated accuracy. If it does not, we have an integrity failure and the possibility of conveying hazardously misleading information. GPS has built into it various checks and balances to ensure a fairly high level of integrity. However, GPS integrity failures have occasionally occurred. One of these was in 1990 when SVN19, a GPS Block II satellite operating as PRN19, suffered a hardware chain failure, which caused it to transmit an anomalous waveform, evidenced by carrier leakage on the L1 signal spectrum. Receivers continued to acquire and process the SVN19 signals, oblivious to the fact that the signal distortion resulted in position errors of three to eight meters. Errors of this magnitude would normally go unnoticed by most users, and the significance of the failure wasn't clear until March 1993 during some field tests of differential navigation for aided landings being conducted by the Federal Aviation Administration. The anomaly became known as the “evil waveform.”(I'm not sure who first came up with this moniker for the anomaly. Perhaps it was the folks at Stanford University who have worked closely with the FAA in its aircraft navigation research. The term has even made it into popular culture. The Japanese drone-metal rock band, Boris, released an album in 2005 titled Dronevil. One of the cuts on the album is “Evil Wave Form.” And if drone metal is not your cup of tea, you will find the title quite appropriate.). Other types of GPS evil waveforms are possible, and there is the potential for such waveforms to also occur in the signals of other global navigation satellite systems. It is important to fully understand the implications of these potential signal anomalies. In this month's column, our authors discuss a set of GPS and Galileo evil-waveform experiments they have carried out with an advanced GNSS RF signal simulator. Their results will help to benchmark the effects of distorted signals and perhaps lead to further improvements in GNSS signal integrity. Numéro de notice : A2013-250 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32388
in GPS world > vol 24 n° 5 (May 2013) . - pp 45 - 50[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 067-2013051 RAB Revue Centre de documentation En réserve L003 Disponible Galileo altimetry using AltBOC and RTK techniques / Jürgen Dampf in Inside GNSS, vol 8 n° 1 (January - February 2013)
[article]
Titre : Galileo altimetry using AltBOC and RTK techniques Type de document : Article/Communication Auteurs : Jürgen Dampf, Auteur ; et al., Auteur Année de publication : 2013 Article en page(s) : pp 54 - 63 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] hauteur (coordonnée)
[Termes IGN] réflectométrie par GNSS
[Termes IGN] résolution d'ambiguïté
[Termes IGN] signal GalileoRésumé : (Auteur) Reflectometry systems analyze reflected GNSS signals to investigate properties of the reflecting surface and to derive various parameters from that surface. The emergence of additional GNSS systems has increased the availability of multiple signals on multiple frequencies, which provides the opportunity for developing new techniques for applying reflectometry. This article describes an E1/E5a/E5b ground-based altimetry application that has been tested with Galileo signals. The innovative aspect of this system resolves carrier phase ambiguities as in RTK positioning to achieve millimeter accurate surface height measurements, including the use of Galileo AltBOC code measurements for instantaneous decimeter accurate height values. New applications enabled by this technique may include monitoring of large buildings, landslides, or precision passive radar. Numéro de notice : A2013-166 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32304
in Inside GNSS > vol 8 n° 1 (January - February 2013) . - pp 54 - 63[article]Documents numériques
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a2013-166_janfeb13-wp.pdfAdobe Acrobat PDF Galileo IOV-3 broadcasts E1, E5, E6 signals / Oliver Montenbruck in GPS world, vol 24 n° 1 (January 2013)
[article]
Titre : Galileo IOV-3 broadcasts E1, E5, E6 signals Type de document : Article/Communication Auteurs : Oliver Montenbruck, Auteur ; R. Langley, Auteur Année de publication : 2013 Article en page(s) : pp 18 - 27 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] ionosphère
[Termes IGN] phase
[Termes IGN] signal GalileoRésumé : (documentaliste) Le satellite IOV-3 de Galiléo a commencé à émettre son signal. Numéro de notice : A2013-025 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32163
in GPS world > vol 24 n° 1 (January 2013) . - pp 18 - 27[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 067-2013011 RAB Revue Centre de documentation En réserve L003 Disponible Exploiting the Galileo E5 wideband signal for improved single-frequency precise positioning / H. Toho Diessongo in Inside GNSS, vol 7 n° 5 (September - October 2012)
[article]
Titre : Exploiting the Galileo E5 wideband signal for improved single-frequency precise positioning Type de document : Article/Communication Auteurs : H. Toho Diessongo, Auteur ; Heike Bock, Auteur ; Torben Schüler, Auteur ; et al., Auteur Année de publication : 2012 Article en page(s) : pp 64 - 73 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] géopositionnement
[Termes IGN] positionnement ponctuel précis
[Termes IGN] précision centimétrique
[Termes IGN] récepteur monofréquence
[Termes IGN] signal GalileoRésumé : (Auteur) Single-frequency positioning can undoubtedly be improved with the deployment of new GNSS systems and the accompanying availability of new signals. Among various innovations, the Galileo E5 broadband signal deserves special attention. Its unique features, including the AltBOC modulation scheme, will drastically boost code range precision, both in terms of reduced code noise as well as with respect to multipath. Precise single-frequency positioning will be feasible at centimeter level, benefiting both scientific and non-scientific applications. This article demonstrates the expected performance of E5 for selected land applications and precise orbit determination of low Earth orbiting satellites. Numéro de notice : A2012-508 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31954
in Inside GNSS > vol 7 n° 5 (September - October 2012) . - pp 64 - 73[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 159-2012051 SL Revue Centre de documentation Revues en salle Disponible Documents numériques
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a2012-508_galileo_e5_wideband_signal_toho_diessongo.pdfAdobe Acrobat PDF Galileo's surveying potential: E5 pseudorange precision / Ismael Colomina in GPS world, vol 23 n° 3 (March 2012)PermalinkGalileo, un système global de positionnement par satellites / Jonathan Chenal (2012)PermalinkMBOC signal options: performance of multiplexed binary offset carrier modulations for modernized GNSS systems / E. Lohan in GPS world, vol 22 n° 6 (June 2011)PermalinkGNSS RF Compatibility assessment: Interference among GPS, Galileo and Compass / W. Liu in GPS world, vol 21 n° 12 (December 2010)PermalinkThe system Galileo PRS delivery in question / Anonyme in GPS world, vol 21 n° 11 (November 2010)PermalinkThe view from Chilbolton: in-orbit test results from the second Galileo satellite / G. Gatti in Inside GNSS, vol 3 n° 6 (September 2008)PermalinkGIOVE-B on the ai r: understanding Galileo's new signals / G. Gao in Inside GNSS, vol 3 n° 4 (May - June 2008)PermalinkGALILEO validation: the validation message / M. Tossaint in GPS world, vol 19 n° 2 (February 2008)PermalinkPermalinkGateway to a successful start of Galileo: gate, Galileo test environment / S. Plum in Geoinformatics, vol 10 n° 8 (01/12/2007)PermalinkLe positionnement en intérieur / Nel Samama in XYZ, n° 112 (septembre - novembre 2007)PermalinkGalileo signal experimentation / M. Hollreiser in GPS world, vol 18 n° 5 (May 2007)PermalinkThe triumph of GIOVE-A: the first Galileo satellite / J. Benedicto in ESA bulletin, n° 127 (August 2006)PermalinkSearching for Galileo: reception and analysis of signals from GIOVE-A / M.L. Psiaki in GPS world, vol 17 n° 6 (June 2006)PermalinkGPS + modernized GPS + Galileo signal timing biases / C. Hegarty in GPS world, vol 17 n° 3 (March 2006)PermalinkGPS et Galileo : systèmes de navigation par satellites / Jean-Marc Piéplu (2006)PermalinkTo locate a phone or PDA: GNSS/UMTS prototype for mass-market applications / G. Heinrichs in GPS world, vol 17 n° 1 (January 2006)PermalinkEarly results are in testing a prototype Galileo receiver / N. Gerein in GPS world, vol 16 n° 11 (November 2005)PermalinkGalileo, un projet de plus en plus mondial / Françoise de Blomac in SIG la lettre, n° 64 (février 2005)PermalinkGalileo frequency and signal design / Günter W. Hein in GPS world, vol 14 n° 6 (June 2003)Permalink