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One year in orbit: GIOVE-B E1 CBOC signal quality assessment / M. Sollner in GPS world, vol 20 n° 9 (September 2009)

Public [article]  inGPS world > vol 20 n° 9 (September 2009) . - 8 p. ; pp 28 - 38 Titre : One year in orbit: GIOVE-B E1 CBOC signal quality assessment Type de document : Article/Communication Auteurs : M. Sollner, Auteur ; C. Kurzhals, Auteur ; W. Kogler, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : 8 p. ; pp 28 - 38 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes IGN] qualité du signal [Termes IGN] signal GNSS [Termes IGN] test de performance Résumé : (Editeur) The second GALILEO test satellite, GIOVE-B, was launched on April 27,2008, and began transmitting navigation signals a few days later. It joined its older sibling, GIOVE-A, which was placed in orbit over two years earlier. [...] The launches are expected to occur by the end of 2010. But before the In-Orbit Validation (IOV) phase can begin, a thorough analysis of the performance of the GIOVE satellites must be carried out to minimize any difficulties with the IOV satellites. This includes monitoring and assessing the different signals broadcast by the satellites. The GIOVE satellites can transmit on all three Galileo frequencies, E5, E6, and E1 (also known as L1) but only on two simultaneously (either E1-E5 or E1-E6). A variety of modulation types can be transmitted on the different frequencies by both satellites to test their use for the different Galileo services to be implemented for the operational constellation. These include alternative binary offset carrier (BOC) and quadrature phase shift keying on E5 and cosine BOC (BOCc) and binary phase shift keying on E6. On E1, the satellites have different capabilities. Although both satellites can transmit BOCc on this frequency, GIOVE-A can additionally transmit a single BOC signal with a subcarrier frequency of 1.023 MHz and a spreading code chipping rate of 1.023 MHz (BOC(1,1)) whereas GIOVE-B transmits a more versatile multiplexed composite BOC or CBOC, which linearly combines BOC(1,1) and BOC(6,1). The CBOC signal is being transmitted by GIOVE-B to explore its performance, usability, and any possible side effects including its use in receivers designed to track a BOC(1,1) signal. GIOVE-B has now been in orbit for just over one year. How well is it performing? In particular, what can we say about one of GIOVE-B's pioneering features: its E1 CBOC signal? In this month's column, we take a detailed look at a particular monitoring and assessment program set up to examine the GIOVE-B signals and discuss some of its initial CBOC results. The successful operation of this program bodes well for its use in future validation campaigns. Copyright Questex Media Group Numéro de notice : A2009-348 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29978 [article]

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067-09091	SL	Revue	Centre de documentation	Revues en salle	Disponible

CONGO: First GPS/GIOVE tracking network for science, research / Oliver Montenbruck in GPS world, vol 20 n° 9 (September 2009)

Public [article]  inGPS world > vol 20 n° 9 (September 2009) . - 7 p. ; pp 56 - 62 Titre : CONGO: First GPS/GIOVE tracking network for science, research Type de document : Article/Communication Auteurs : Oliver Montenbruck, Auteur ; André Hauschild, Auteur ; U. Hessels, Auteur ; Peter Steigenberger, Auteur ; Urs Hugentobler, Auteur Année de publication : 2009 Article en page(s) : 7 p. ; pp 56 - 62 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes IGN] récepteur GNSS [Termes IGN] station de poursuite Résumé : (Auteur)/d'éditeur : Selected results from the COoperative Network for GIOVE Observation (CONGO) demonstrate how the global network provides early familiarization with the new Galileo signals and access to precise GIOVE orbit and clock information, to develop new processing techniques for multi-constellation, multi-frequency GNSS. Initial results from CONGO, the first network of GNSS receivers for scientific applications offering combined GPS and GIOVE tracking on a continuous and global level, demonstrate orbit determination of the GIOVE satellites at an accuracy level of 1 meter. The resulting products will enable a combined positioning using GPS/GIOVE or GPS/GLONASS/GIOVE measurements now provided by the latest geodetic GNSS receivers. The generation of real-time orbit and clock products is under development. They will help to bridge gaps in the availability of broadcast ephemerides and will enable continuous navigation with the GIOVE satellites. In the next year, at least two new stations will be added to the CONGO network. This will further enhance robustness and improve overall quality of network products. Copyright Questex Media Group Numéro de notice : A2009-349 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29979 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
067-09091	SL	Revue	Centre de documentation	Revues en salle	Disponible