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GNSS update: interface control / Huibert-Jan Lekkerkerk in Geoinformatics, vol 12 n° 6 (01/09/2009)
[article]
Titre : GNSS update: interface control Type de document : Article/Communication Auteurs : Huibert-Jan Lekkerkerk, Auteur Année de publication : 2009 Article en page(s) : 2 p. ; pp 22 - 23 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] Global Navigation Satellite System
[Termes IGN] récepteur GNSSRésumé : (Editeur) According to Andrew Sage, director of UK-based consulting firm Helios, the winner among Galileo, Glonass and Compass will not be the one getting the satellites into orbit but the one that publishes a firm and manufacturer friendly interface control document. Copyright GEOinformatics Numéro de notice : A2009-320 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29950
in Geoinformatics > vol 12 n° 6 (01/09/2009) . - 2 p. ; pp 22 - 23[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 262-09061 SL Revue Centre de documentation Revues en salle Disponible Investigating tropospheric effects and seasonal position variations in GPS and DORIS time-series from the Nepal Himalaya / Mireille Flouzat in Geophysical journal international, vol 178 n° 3 (September 2009)
[article]
Titre : Investigating tropospheric effects and seasonal position variations in GPS and DORIS time-series from the Nepal Himalaya Type de document : Article/Communication Auteurs : Mireille Flouzat, Auteur ; Pierre Bettinelli, Auteur ; Pascal Willis , Auteur ; Jean-Philippe Avouac, Auteur ; Thierry Héritier, Auteur ; Umesh Gautam, Auteur Année de publication : 2009 Projets : 1-Pas de projet / Article en page(s) : pp 1246 - 1259 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] données DORIS
[Termes IGN] données GPS
[Termes IGN] Himalaya
[Termes IGN] propagation troposphérique
[Termes IGN] série temporelle
[Termes IGN] variation saisonnièreRésumé : (auteur) Geodetic time-series from continuous GPS (cGPS) and 1 DORIS stations across the Himalaya of central Nepal show strong seasonal fluctuations observed on the horizontal and vertical components. Because the fluctuations determined at the different stations have similar phase but different amplitudes, these observations would imply that the secular shortening across the range is modulated by a seasonal strain. Given the geographic and climatic setting, there is however a possibility that the GPS positions be biased by tropospheric effects. We process these data using two different software packages and two different analysis strategies. Our analysis shows evidence for 1-strong seasonal fluctuation of zenithal delays consistent with in situ meteorological data and two strong horizontal tropospheric gradients in particular in the EW direction, that is, parallel to the mountain front at Gumba, also detected in DORIS results. We show that the tropospheric effects cannot however be the source of the observed seasonality of horizontal strain. This study supports the view that the seasonal strain in the Himalaya is real and probably driven by seasonal surface load variations. Our study adds support to the view that seasonal variations of seismicity in the Himalaya reflects seasonal variations of geodetic strain. Numéro de notice : A2009-604 Affiliation des auteurs : LAREG+Ext (1991-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1365-246X.2009.04252.x En ligne : https://doi.org/10.1111/j.1365-246X.2009.04252.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=95755
in Geophysical journal international > vol 178 n° 3 (September 2009) . - pp 1246 - 1259[article]vol 64 n° 5 - September - October 2009 - Mapping with SAR: Techniques and applications (Bulletin de ISPRS Journal of photogrammetry and remote sensing) / A. Reigber
[n° ou bulletin]
est un bulletin de ISPRS Journal of photogrammetry and remote sensing / International society for photogrammetry and remote sensing (1980 -) (1990 -)
Titre : vol 64 n° 5 - September - October 2009 - Mapping with SAR: Techniques and applications Type de document : Périodique Auteurs : A. Reigber, Éditeur scientifique ; Laurent Ferro-Famil, Éditeur scientifique ; International society for photogrammetry and remote sensing (1980 -), Auteur Année de publication : 2009 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie
[Termes IGN] agriculture
[Termes IGN] cartographie thématique
[Termes IGN] image radar
[Termes IGN] interférométrie
[Termes IGN] radar à antenne synthétique
[Termes IGN] SAR and interferometric radar altimeterNuméro de notice : 081-0905 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Numéro de périodique En ligne : https://doi.org/10.1016/j.isprsjprs.2008.09.008 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=bulletin_display&id=9981 [n° ou bulletin]Contient
- Discrimination of agricultural crops in a tropical semi-arid region of Brazil based on L-band polarimetric airborne SAR data / W. Silva in ISPRS Journal of photogrammetry and remote sensing, vol 64 n° 5 (September - October 2009)
- Classification comparisons between dual-pol, compact polarimetric and quad-pol SAR imagery / T. Ainsworth in ISPRS Journal of photogrammetry and remote sensing, vol 64 n° 5 (September - October 2009)
- Interferometric SAR for characterization of ravines as a function of their density, depth, and surface cover / R.S. Chatterjee in ISPRS Journal of photogrammetry and remote sensing, vol 64 n° 5 (September - October 2009)
- Rapid mapping of high resolution SAR scenes / F. Dell'acqua in ISPRS Journal of photogrammetry and remote sensing, vol 64 n° 5 (September - October 2009)
- Stereo analysis of high-resolution SAR images for building height estimation in cases of orthogonal aspect directions / Uwe Soergel in ISPRS Journal of photogrammetry and remote sensing, vol 64 n° 5 (September - October 2009)
- Validation and comparison of advanced differential interferometry techniques: Murcia metropolitan area case study / G. Herrera in ISPRS Journal of photogrammetry and remote sensing, vol 64 n° 5 (September - October 2009)
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Code-barres Cote Support Localisation Section Disponibilité 081-09051 SL Revue Centre de documentation Revues en salle Disponible One year in orbit: GIOVE-B E1 CBOC signal quality assessment / M. Sollner in GPS world, vol 20 n° 9 (September 2009)
[article]
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 performanceRésumé : (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
in GPS world > vol 20 n° 9 (September 2009) . - 8 p. ; pp 28 - 38[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 067-09091 SL Revue Centre de documentation Revues en salle Disponible Remote sensing with reflected signals: GNSS-R data processing software and test analysis / D. Yang in Inside GNSS, vol 4 n° 5 (September - October 2009)
[article]
Titre : Remote sensing with reflected signals: GNSS-R data processing software and test analysis Type de document : Article/Communication Auteurs : D. Yang, Auteur ; Y. Zhou, Auteur ; Y. Wang, Auteur Année de publication : 2009 Article en page(s) : 6 p. ; pp 40 - 45 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] bande L
[Termes IGN] humidité du sol
[Termes IGN] mer
[Termes IGN] prairie
[Termes IGN] réflexion (rayonnement)
[Termes IGN] signal GNSS
[Termes IGN] signal GPS
[Termes IGN] télédétection aérienneRésumé : (Auteur) Authors from a leading Chinese university describe how reflected GNSS signals can be used in sea-wind retrieval, seawater salinity detection, ice-layer density measurement and other remote sensing applications. They introduce the GNSS-R concept, demonstrate the characteristics of the GPS reflected signal, and describe their data-processing method for exploiting the reflected signals. The article includes test results from field trials gathering data over maritime and grassland areas. Copyright Gibbons Media & Research LLC Numéro de notice : A2009-667 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33558
in Inside GNSS > vol 4 n° 5 (September - October 2009) . - 6 p. ; pp 40 - 45[article]Documents numériques
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Remote sensing with reflected signals ... - pdf éditeurAdobe Acrobat PDF Satellite laser ranging mobile station: Presentation and geodetic applications / Bachir Gourine in Bulletin des sciences géographiques, n° 24 (Septembre 2009)PermalinkSignal authentication: a secure civil GNSS for today / S. Lo in Inside GNSS, vol 4 n° 5 (September - October 2009)PermalinkThe SVN49 pseudorange error / R. Langley in GPS world, vol 20 n° 8 (August 2009)PermalinkArchitecture for a future C-band/L-band GNSS mission : Part 2 signal considerations and related user terminal aspects / José Avila-Rodriguez in Inside GNSS, vol 4 n° 4 (July - August 2009)PermalinkGNSS and ionospheric scintillation: how to survive the next solar maximum / P. Kintner in Inside GNSS, vol 4 n° 4 (July - August 2009)PermalinkMaking sense of inter-signal corrections: accounting for GPS satellite calibration parameters in legacy and modernized ionosphere correction algorithms / Avram Tetewsky in Inside GNSS, vol 4 n° 4 (July - August 2009)PermalinkWhere is GIOVE-A exactly? Using microwaves and laser ranging for precise orbit determination / Erik Schönemann in GPS world, vol 20 n° 7 (July 2009)PermalinkPermalinkGNSS update: frequenting frequencies / Huibert-Jan Lekkerkerk in Geoinformatics, vol 12 n° 4 (01/06/2009)PermalinkOn the late northward propagation of the West African monsoon in summer 2006 in the region of Niger/Mali / Philippe Drobinski in Journal of geophysical research : Atmospheres, vol 114 n° D9 (2009)Permalink