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Broadband versus GPS / Huibert-Jan Lekkerkerk in Geoinformatics, vol 14 n° 5 (01/07/2011)
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Titre : Broadband versus GPS Type de document : Article/Communication Auteurs : Huibert-Jan Lekkerkerk, Auteur Année de publication : 2011 Article en page(s) : pp 14 - 15 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] Global Navigation Satellite System
[Termes IGN] interférence
[Termes IGN] largeur de bande
[Termes IGN] signal GPS
[Termes IGN] système d'extensionRésumé : (Auteur) In the USA, the battle around wide area broadband solution provider LightSquared rages on. LightSquared operates in a frequency band that is overlapping the GPS L1 and is causing interference to that frequency band. In total, over 40 000 ground stations are planned all over the country and the high precision industry in particular could suffer the consequences. John Deere & Company gave the first report of interference to the FCC (Federal Communications Commission). Numéro de notice : A2011-323 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31102
in Geoinformatics > vol 14 n° 5 (01/07/2011) . - pp 14 - 15[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 262-2011051 SL Revue Centre de documentation Revues en salle Disponible Multipath minimization method: mitigation through adaptive filtering for machine automation applications / L. Serrano in GPS world, vol 22 n° 7 (July 2011)
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Titre : Multipath minimization method: mitigation through adaptive filtering for machine automation applications Type de document : Article/Communication Auteurs : L. Serrano, Auteur ; D. Kim, Auteur ; R. Langley, Auteur Année de publication : 2011 Article en page(s) : pp 42 - 48 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement du signal
[Termes IGN] antenne GNSS
[Termes IGN] appariement de formes
[Termes IGN] filtrage du rayonnement
[Termes IGN] guidage de véhicules
[Termes IGN] phase GPS
[Termes IGN] trajet multipleRésumé : (Auteur) [...] The best way to reduce the effects of multipath is to try avoiding it in the first place by siting the receiver's antenna as low as possible and far away from potential reflectors. But that's not always feasible. [...] At a static site, with an unchanging multipath environment, the signal reflection geometry repeats day to day and the effect of multipath can be reduced by sidereal filtering or "stacking" of coordinate or carrier-phase-residual time series. However, this approach is not viable for scenarios where the receiver and antenna are moving such as in machine control applications. Here an alternative approach is needed. In this month's column, I am joined by two of my UNB colleagues as we look at a technique that uses a pair of antennas on a moving vehicle together with a sophisticated mathematical model, to reduce the level of multipath on carrier-phase observations and thereby improve the accuracy of the vehicle's position. Numéro de notice : A2011-326 Affiliation des auteurs : non IGN Thématique : IMAGERIE/POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31105
in GPS world > vol 22 n° 7 (July 2011) . - pp 42 - 48[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 067-2011071 RAB Revue Centre de documentation En réserve L003 Disponible MBOC signal options: performance of multiplexed binary offset carrier modulations for modernized GNSS systems / E. Lohan in GPS world, vol 22 n° 6 (June 2011)
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Titre : MBOC signal options: performance of multiplexed binary offset carrier modulations for modernized GNSS systems Type de document : Article/Communication Auteurs : E. Lohan, Auteur ; M. Bhuiyan, Auteur ; H. Hurskainen, Auteur Année de publication : 2011 Article en page(s) : pp 68 - 74 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement du signal
[Termes IGN] Global Navigation Satellite System
[Termes IGN] performance
[Termes IGN] signal Galileo
[Termes IGN] signal GPSRésumé : (Auteur) A candidate for modernized GNSS civil signals in the L1/E1 band was BOC(1,1), a binary-offset-carrier signal with a "split spectrum" that has negligible impact on the existing GPS signals. However, a signal with better acquisition capabilities and improved multipath performance (while still compatible with the existing GPS signals) is a multiplexed BOC modulation, MBOC(6,1,1/11). The MBOC spectrum can be achieved by following one of several different signal-construction paths with some resulting differences in how a receiver tracks the signal and its associated performance. Numéro de notice : A2011-276 Affiliation des auteurs : non IGN Thématique : IMAGERIE/POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31054
in GPS world > vol 22 n° 6 (June 2011) . - pp 68 - 74[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 067-2011061 RAB Revue Centre de documentation En réserve L003 Disponible Keeping the spoofs out: signal authentication services for future GNSS / Oscar Pozzobon in Inside GNSS, vol 6 n° 3 (May - June 2011)
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Titre : Keeping the spoofs out: signal authentication services for future GNSS Type de document : Article/Communication Auteurs : Oscar Pozzobon, Auteur Année de publication : 2011 Article en page(s) : 8 p. ; pp 48 - 55 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] anti-leurrage
[Termes IGN] authentification
[Termes IGN] signal GNSSRésumé : (Auteur) GNSS signal authentication is a requirement for a number of applications. The article reviews the navigation message authentication concept and its limitations and proposes a new authentication sequences that can be integrated in GNSS. The methods work on systems that provide an open and encrypted service on the same frequency and would require minimum changes to the system. Numéro de notice : A2011-618 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33474
in Inside GNSS > vol 6 n° 3 (May - June 2011) . - 8 p. ; pp 48 - 55[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 159-2011031 SL Revue Centre de documentation Revues en salle Disponible Documents numériques
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Keeping the spoofs out ... - pdfAdobe Acrobat PDF GLONASS: developping strategies for the future / Y. Urlichich in GPS world, vol 22 n° 4 (April 2011)
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Titre : GLONASS: developping strategies for the future Type de document : Article/Communication Auteurs : Y. Urlichich, Auteur ; V. Subbotin, Auteur ; et al., Auteur Année de publication : 2011 Article en page(s) : pp 42 - 49 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] code GLONASS
[Termes IGN] constellation GLONASS
[Termes IGN] qualité du signal
[Termes IGN] signal GLONASS
[Termes IGN] station GLONASS
[Termes IGN] système de positionnement par satellites
[Termes IGN] traitement du signalRésumé : (Auteur) It's no longer just a GPS world. Russia's GLONASS, or Global'naya Navigat-slonaya Sputnikova Sistema, will soon have a full complement of satellites in orbit providing positioning, navigation, and timing worldwide. The Soviet Union began development of GLONASS in 1976 just a few years after work started on GPS. The first satellite was launched in 1982 and a fully populated constellation of 24 functioning satellites was achieved in early 1996. However, due to economic difficulties following the dismantling of the Soviet Union, by 2002 the constellation had dropped to as few as seven satellites. But the Russian economy improved, and restoration of GLONASS was given high priority by the Russian government. The satellite constellation was gradually rejuvenated using primarily a new modernized spacecraft, GLONASS-M. The new design offered many improvements, including better onboard electronics, a longer lifetime, an L2 civil signal, and an improved navigation message. The GLONASS-M spacecraft still used a pressurized, hermetically sealed cylinder for the electronics, as had the earlier versions. Today, 26 functional GLONASS-M satellites are on orbit, 22 of them in service and providing usable signals, with four more having reserve status. A full constellation of 24 satellites should be available later this year with launches of several GLONASS-M satellites and the latest variant, the GLONASS-K Satellite. GLONASS-K satellites are markedly different from their predecessors. They are lighter, use an unpressurized housing (similar to that of GPS satellites), have improved clock stability, and a longer, 10-year design life. They also include, for the first time, code-division-multiple-access (CDMA) signals accompanying the legacy frequency-division-multiple-access signals. There will be two versions: GLONASS-K1 will transmit a CDMA signal on a new L3 frequency, and GLONASS-K2, in addition, will feature CDMA signals on L1 and L2 frequencies. The first GLONASS-K1 satellite was launched on February 26 and is now undergoing tests. GLONASS is being further improved with a satellite-based augmentation system. Called the System for Differential Correction and Monitoring or SDCM, it will use a ground network of monitoring stations and Luch geostationary communication satellites to transmit correction and integrity data using the GPS L1 frequency. The first of these satellites, Luch-5A, will be launched this year. In this month's column, a team of authors from Russian Space Systems, a key developer of navigation and geospatial technologies in the Russian aerospace industry, describes the new L3 CDMA signal to be broadcast by GLONASS-K satellites and the progress to date in developing the SDCM augmentation system. Numéro de notice : A2011-153 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30932
in GPS world > vol 22 n° 4 (April 2011) . - pp 42 - 49[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 067-2011041 RAB Revue Centre de documentation En réserve L003 Disponible Coherent integration time limits for mobile GNSS receivers in multipath fading environments / Ali Broumandan in Inside GNSS, vol 6 n° 2 (March - April 2011)PermalinkEGNOS gets to work / F. Boullete in GPS world, vol 22 n° 2 (February 2011)PermalinkEvaluation of the impact of atmospheric pressure loading modeling on GNSS data analysis / Rolf Dach in Journal of geodesy, vol 85 n° 2 (February 2011)PermalinkGNSS and the Ionosphere: What's in Store for the Next Solar Maximum? / A. Jensen in GPS world, vol 22 n° 2 (February 2011)PermalinkHarmonisation des séries temporelles : Application en climatologie / Anonyme in Géomatique expert, n° 78 (01/01/2011)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)PermalinkRecord, Replay, Rewind : Testing GNSS Receivers with Record and Playback Techniques / D. Hall in GPS world, vol 21 n° 10 (October 2010)PermalinkCombinaison linéaire et l'intérêt de la troisième fréquence pour le positionnement en double différence par GPS / L. Tabti in XYZ, n° 124 (septembre - novembre 2010)PermalinkGPS IIF-1 satellite: Antenna phase center and attitude modeling / F. Dilssner in Inside GNSS, vol 5 n° 6 (September 2010)PermalinkA first look at the effects of ionospheric signal bending on a globally processed GPS network / E. Petrie in Journal of geodesy, vol 84 n° 8 (August 2010)PermalinkAviation grade : New GPS signals, chips off the block IIF / R.E. Phelts in Inside GNSS, vol 5 n° 5 (July - August 2010)PermalinkGLONASS CDMA: Some proposals on signal formats for future GNSS air interface / V. Ipatov in Inside GNSS, vol 5 n° 5 (July - August 2010)PermalinkPermalinkAccuracy versus precision: a primer on GPS truth / D. Rutledge in GPS world, vol 21 n° 5 (May 2010)PermalinkSingle receiver phase ambiguity resolution with GPS data / Willy I. Bertiger in Journal of geodesy, vol 84 n° 5 (May 2010)PermalinkHybrid positioning: a prototype system for navigation in GPS-challenged environments / Chris Rizos in GPS world, vol 21 n° 3 (March 2010)PermalinkReady to navigate: a methodology for the estimation of the time-to-first-fix / M. Anghileri in Inside GNSS, vol 5 n° 2 (March - April 2010)PermalinkModernization milestone: the GPS civil monitoring performance specification / T. Nagle in Inside GNSS, vol 5 n° 1 (January - February 2010)PermalinkOne year in orbit: GIOVE-B E1 CBOC signal quality assessment / M. Sollner in GPS world, vol 20 n° 9 (September 2009)Permalink