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Aviation grade : New GPS signals, chips off the block IIF / R.E. Phelts in Inside GNSS, vol 5 n° 5 (July - August 2010)
[article]
Titre : Aviation grade : New GPS signals, chips off the block IIF Type de document : Article/Communication Auteurs : R.E. Phelts, Auteur ; G. Gao, Auteur ; G. Wong, Auteur ; et al., Auteur Année de publication : 2010 Article en page(s) : 9 p. ; pp 36 - 45 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] distorsion du signal
[Termes IGN] puce
[Termes IGN] signal GPSRésumé : (Auteur) Civil aviation depends on augmentation systems that use many monitors and complex algorithms to make sure signals meet ever higher requirements for accuracy and integrity. This includes estimating the size of errors due to signal deformations. Research teams from the United States and Germany focus on the quality of the chips in signals from the new Block IIF satellite. Their findings: the IIF L1 C/A is a superior signal suitable for aviation, and L5 chip quality - at least initially - appears very similar to previous measurements for L1 but deeper analysis is underway. Numéro de notice : A2010-625 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33451
in Inside GNSS > vol 5 n° 5 (July - August 2010) . - 9 p. ; pp 36 - 45[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 159-2010051 SL Revue Centre de documentation Revues en salle Disponible Documents numériques
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Aviation grade : New GPS ... - pdf éditeurAdobe Acrobat PDF GLONASS CDMA: Some proposals on signal formats for future GNSS air interface / V. Ipatov in Inside GNSS, vol 5 n° 5 (July - August 2010)
[article]
Titre : GLONASS CDMA: Some proposals on signal formats for future GNSS air interface Type de document : Article/Communication Auteurs : V. Ipatov, Auteur ; B. Shebshaevich, Auteur Année de publication : 2010 Article en page(s) : 6 p. ; pp 46 - 51 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] signal GLONASSRésumé : (Auteur) CDMA will soon supplement GLONASS’s FDMA signal. In this article, the authors explore the selection of a ranging code ensemble and the modulation mode for the new signal.They propose Kerdock signature sets for ranging code ensembles and MSK-type modulation. Numéro de notice : A2010-627 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33456
in Inside GNSS > vol 5 n° 5 (July - August 2010) . - 6 p. ; pp 46 - 51[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 159-2010051 SL Revue Centre de documentation Revues en salle Disponible Documents numériques
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GLONASS CDMA ... - pdf éditeurAdobe Acrobat PDF Integer least-squares theory for the GNSS compass / Peter J.G. Teunissen in Journal of geodesy, vol 84 n° 7 (July 2010)
[article]
Titre : Integer least-squares theory for the GNSS compass Type de document : Article/Communication Auteurs : Peter J.G. Teunissen, Auteur Année de publication : 2010 Article en page(s) : pp 433 - 447 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] altitude
[Termes IGN] ambiguïté entière
[Termes IGN] données GNSS
[Termes IGN] méthode des moindres carrés
[Termes IGN] positionnement par GNSS
[Termes IGN] résolution d'ambiguïtéRésumé : (Auteur) Global navigation satellite system (GNSS) carrier phase integer ambiguity resolution is the key to high precision positioning and attitude determination. In this contribution, we develop new integer least-squares (ILS) theory for the GNSS compass model, together with efficient integer search strategies. It extends current unconstrained ILS theory to the nonlinearly constrained case, an extension that is particularly suited for precise attitude determination. As opposed to current practice, our method does proper justice to the a priori given information. The nonlinear baseline constraint is fully integrated into the ambiguity objective function, thereby receiving a proper weighting in its minimization and providing guidance for the integer search. Different search strategies are developed to compute exact and approximate solutions of the nonlinear constrained ILS problem. Their applicability depends on the strength of the GNSS model and on the length of the baseline. Two of the presented search strategies, a global and a local one, are based on the use of an ellipsoidal search space. This has the advantage that standard methods can be applied. The global ellipsoidal search strategy is applicable to GNSS models of sufficient strength, while the local ellipsoidal search strategy is applicable to models for which the baseline lengths are not too small. We also develop search strategies for the most challenging case, namely when the curvature of the non-ellipsoidal ambiguity search space needs to be taken into account. Two such strategies are presented, an approximate one and a rigorous, somewhat more complex, one. The approximate one is applicable when the fixed baseline variance matrix is close to diagonal. Both methods make use of a search and shrink strategy. The rigorous solution is efficiently obtained by means of a search and shrink strategy that uses non quadratic, but easy-to-evaluate, bounding functions of the ambiguity objective function. The theory presented is generally valid and it is not restricted to any particular GNSS or combination of GNSSs. Its general applicability also applies to the measurement scenarios (e.g. single-epoch vs. multi-epoch, or single-frequency vs. multi-frequency). In particular it is applicable to the most challenging case of unaided, single frequency, single epoch GNSS attitude determination. The success rate performance of the different methods is also illustrated. Numéro de notice : A2010-569 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-010-0380-8 Date de publication en ligne : 02/04/2010 En ligne : https://doi.org/10.1007/s00190-010-0380-8 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30761
in Journal of geodesy > vol 84 n° 7 (July 2010) . - pp 433 - 447[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 266-2010071 SL Revue Centre de documentation Revues en salle Disponible Contributions of the French Institut Géographique National (IGN) to the International DORIS Service / Pascal Willis in Advances in space research, vol 45 n° 12 (15/06/2010)
[article]
Titre : Contributions of the French Institut Géographique National (IGN) to the International DORIS Service Type de document : Article/Communication Auteurs : Pascal Willis , Auteur ; Claude Boucher , Auteur ; Hervé Fagard, Auteur ; Bruno Garayt , Auteur ; Marie-Line Gobinddass , Auteur Année de publication : 2010 Article en page(s) : pp 1470 - 1480 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] données DORIS
[Termes IGN] International DORIS Service
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] mouvement du pôle
[Termes IGN] positionnement par DORIS
[Termes IGN] réseau DorisRésumé : (Auteur) DORIS is one of the four geodetic space techniques participating to the Global Geodetic Observing System (GGOS). Since the early development of this system, the Institut Géographique National played a specific and active role. Within, the International DORIS Service (IDS), IGN is in a particular position. While it is responsible for the installation and the maintenance of the DORIS ground tracking stations, it also handles one of the two IDS data center delivering DORIS data and products and has been an IDS Analysis Center for years, providing all possible IDS products, in particular the latest ignwd08 time series in preparation of ITRF2008. This paper explains the different aspects of the IGN contribution to IDS from an historical point of view, presents current activities and scientific results and provides a perspective for future activities. Recent DORIS results show a 10 mm precision or better when more than four DORIS satellites are available. Comparisons between recent DORIS solutions (ign07d02 and ign09d02) and past ITRF realizations show that errors are shared between the DORIS and the ITRF realizations. Some problems related to DORIS data processing are also discussed and possible ways to solve them in the future are discussed. In particular, we can now reject the tropospheric origin of the problem detected in the Envisat data after the software upload of October 12, 2004. A few applications in geodesy (terrestrial reference frame, Earth's polar motion) and geophysics are also discussed as a natural extension of these service-type activities. Numéro de notice : A2010-361 Affiliation des auteurs : IGN+Ext (2012-2019) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.asr.2009.09.019 Date de publication en ligne : 02/10/2009 En ligne : https://doi.org/10.1016/j.asr.2009.09.019 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30555
in Advances in space research > vol 45 n° 12 (15/06/2010) . - pp 1470 - 1480[article]The crustal dynamics data information system: a resource to support scientific analysis using space geodesy / Carey E. Noll in Advances in space research, vol 45 n° 12 (15/06/2010)
[article]
Titre : The crustal dynamics data information system: a resource to support scientific analysis using space geodesy Type de document : Article/Communication Auteurs : Carey E. Noll, Auteur Année de publication : 2010 Article en page(s) : pp 1421 - 1440 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] déformation de la croute terrestre
[Termes IGN] données DORIS
[Termes IGN] données géodésiques
[Termes IGN] données GNSS
[Termes IGN] données ITGB
[Termes IGN] données multisources
[Termes IGN] géodésie spatiale
[Termes IGN] Global Geodetic Observing System
[Termes IGN] métadonnéesRésumé : (Auteur) Since 1982, the Crustal Dynamics Data Information System (CDDIS) has supported the archive and distribution of geodetic data products acquired by the National Aeronautics and Space Administration (NASA) as well as national and international programs. The CDDIS provides easy, timely, and reliable access to a variety of data sets, products, and information about these data. These measurements, obtained from a global network of nearly 650 instruments at more than 400 distinct sites, include DORIS (Doppler Orbitography and Radiopositioning Integrated by Satellite), GNSS (Global Navigation Satellite System), SLR and LLR (Satellite and Lunar Laser Ranging), and VLBI (Very Long Baseline Interferometry). The CDDIS data system and its archive have become increasingly important to many national and international science communities, particularly several of the operational services within the International Association of Geodesy (IAG) and its observing system the Global Geodetic Observing System (GGOS), including the International DORIS Service (IDS), the International GNSS Service (IGS), the International Laser Ranging Service (ILRS), the International VLBI Service for Geodesy and Astrometry (IVS), and the International Earth rotation and Reference frame Service (IERS). Investigations resulting from the data and products available through the CDDIS support research in many aspects of Earth system science and global change. Each month, the CDDIS archives more than one million data and derived product files totaling over 90 Gbytes in volume. In turn, the global user community downloads nearly 1.2 Tbytes (over 10.5 million files) of data and products from the CDDIS each month. The requirements of analysts have evolved since the start of the CDDIS; the specialized nature of the system accommodates the enhancements required to support diverse data sets and user needs. This paper discusses the CDDIS, including background information about the system and its user communities, archive contents, available metadata, and future plans. Numéro de notice : A2010-360 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.asr.2010.01.018 En ligne : https://doi.org/10.1016/j.asr.2010.01.018 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30554
in Advances in space research > vol 45 n° 12 (15/06/2010) . - pp 1421 - 1440[article]The international DORIS service (IDS): toward maturity / Pascal Willis in Advances in space research, vol 45 n° 12 (15/06/2010)PermalinkAnalyse des séries temporelles SLR du géocentre et des EOP basées sur les mesures des satellites LAGEOS1/2 et Starlette / Bachir Gourine in Bulletin des sciences géographiques, n° 25 (juin 2010)PermalinkAssessing the accuracy of GEOID03 and GEOID09 in Connecticut / Thomas H. Meyer in SaLIS Surveying and land information science, vol 70 n° 2 (Summer 2010)PermalinkPermalinkGPS, GLONASS, and more: multiple constellation processing in the International GNSS Service / Tim A. Springer in GPS world, vol 21 n° 6 (June 2010)PermalinkModélisation des retards troposphériques pour les observations GPS et impacts sur l'estimation de la hauteur ellipsoïdale / François Fund in XYZ, n° 123 (juin - août 2010)PermalinkThe GPS assimilator: Upgrading receivers via benign spoofing / T. Humphreys in Inside GNSS, vol 5 n° 4 (June 2010)PermalinkUpper mantle rheology from GRACE and GPS postseismic deformation after the 2004 Sumatra‐Andaman earthquake / Isabelle Panet in Geochemistry, Geophysics, Geosystems, vol 11 n° 6 (June 2010)PermalinkAccuracy versus precision: a primer on GPS truth / D. Rutledge in GPS world, vol 21 n° 5 (May 2010)PermalinkAsymmetric tropospheric delays from numerical weather models for UT1 determination from VLBI Intensive sessions on the baseline Wettzell–Tsukuba / Johannes Böhm in Journal of geodesy, vol 84 n° 5 (May 2010)PermalinkGPS slant total electron content accuracy using the single layer model under different geomagnetic regions and ionospheric conditions / C. Brunini in Journal of geodesy, vol 84 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)PermalinkThe origins of GPS and the pioneers who launched the system (part one of a two-part story) / B. Parkinson in GPS world, vol 21 n° 5 (May 2010)PermalinkGNSS update: towards operations / Huibert-Jan Lekkerkerk in Geoinformatics, vol 13 n° 3 (01/04/2010)PermalinkIGN : entre recherche et développement / Françoise de Blomac in SIG la lettre, n° 116 (avril 2010)PermalinkImpact of regional reference frame definition on geodynamic interpretations / Juliette Legrand in Journal of geodynamics, vol 49 n° 3-4 (April 2010)PermalinkHomogeneous zenith total delay parameter estimation from European permanent GNSS sites / Wolfgang Söhne in Bulletin of geodesy and geomatics BGG, vol 69 n° 1 (March 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)PermalinkWide-area RTK: high precision positioning on a continental scale / Manuel Hernández-Pajares in Inside GNSS, vol 5 n° 2 (March - April 2010)Permalink