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Titre : Analyse et traitement des signaux : méthodes et applications au son et à l'image Type de document : Guide/Manuel Auteurs : E. Tisserand, Auteur ; J.F. Pautex, Auteur ; P. Schweitzer, Auteur Editeur : Paris : Dunod Année de publication : 2004 Collection : Sciences Sup Sous-collection : Sciences de l'ingénieur Importance : 306 p. Format : 17 x 24 cm ISBN/ISSN/EAN : 978-2-10-007481-5 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Traitement du signal
[Termes IGN] acquisition d'images
[Termes IGN] analyse spectrale
[Termes IGN] compression d'image
[Termes IGN] convolution (signal)
[Termes IGN] échantillonnage de signal
[Termes IGN] filtrage du signal
[Termes IGN] onde acoustique
[Termes IGN] signal analogique
[Termes IGN] signal numérique
[Termes IGN] traitement d'image
[Termes IGN] transformation de FourierIndex. décimale : 24.20 Traitement du signal Résumé : (Editeur) Les signaux sont les vecteurs de la communication, du son et des images en particulier. Cet ouvrage présente les méthodes les plus courantes d'analyse et de traitement des signaux, appliqués au son et à l’image. En matière d'analyse, les bases mathématiques incontournables sont présentées et les méthodes d'analyses corrélatives et spectrales sont détaillées. Le cours est illustré de nombreux exemples et suivi d’exercices corrigés. Numéro de notice : 20005 Affiliation des auteurs : non IGN Thématique : IMAGERIE/POSITIONNEMENT Nature : Manuel de cours Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=46637 Bayesian-based subpixel brightness temperature estimation from multichannel infrared GOES radiometer data / S. Cain in IEEE Transactions on geoscience and remote sensing, vol 42 n° 1 (January 2004)
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Titre : Bayesian-based subpixel brightness temperature estimation from multichannel infrared GOES radiometer data Type de document : Article/Communication Auteurs : S. Cain, Auteur Année de publication : 2004 Article en page(s) : pp 188 - 201 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] classification bayesienne
[Termes IGN] cohérence des données
[Termes IGN] image GOES
[Termes IGN] image multibande
[Termes IGN] image NOAA-AVHRR
[Termes IGN] image optique
[Termes IGN] luminance lumineuse
[Termes IGN] précision infrapixellaire
[Termes IGN] rayonnement infrarouge
[Termes IGN] température de luminanceRésumé : (Auteur) In this paper, a new image reconstruction scheme is devised for estimating a high-resolution temperature map of the top of the earth's atmosphere using the Geostationary Operational Environmental Satellite (GOES) imager infrared channels 4 and 5. By simultaneously interpolating the image while estimating temperature, the proposed algorithm achieves a more accurate estimate of the subpixel temperatures than could be obtained by performing these operations independently of one another. The proposed algorithm differs from other Bayesian-based image interpolation schemes in that it estimates brightness temperature as opposed to image intensity and incorporates a detailed optical model of the GOES multichannel imaging system. In order to test the effectiveness of the proposed technique, high-resolution estimates of cloudtop temperatures using GOES channels 4 and 5 are compared to temperature estimates obtained from the Advanced Very High Resolution Radiometer (AVHRR). This test is achieved by examining sets of infrared data taken simultaneously by the GOES and AVHRR systems over the same geographic area. The AVHRR system collects longwave infrared data with a spatial resolution of 1km, which is higher than the 4km spatial resolution the GOES system achieves. In some cases, the estimated temperature differences between these systems are as high as 11.5 K. It is shown in this paper that the proposed algorithm improves the consistency between the cloudtop temperatures estimated with the GOES and AVHRR systems by allowing the GOES system to achieve substantially higher spatial resolution. Numéro de notice : A2004-044 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2003.815397 En ligne : https://ieeexplore.ieee.org/document/1262596 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26572
in IEEE Transactions on geoscience and remote sensing > vol 42 n° 1 (January 2004) . - pp 188 - 201[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-04011 RAB Revue Centre de documentation En réserve L003 Disponible Celebrating a decade of the International GPS Service, Workshop & Symposium 2004 / Michael Meindl (2004)
Titre : Celebrating a decade of the International GPS Service, Workshop & Symposium 2004 : Proceedings, Berne, Switzerland, March 1-5, 2004 Type de document : Actes de congrès Auteurs : Michael Meindl, Éditeur scientifique Editeur : Berne : Université de Berne Année de publication : 2004 Conférence : IGS 2004, international symposium, Celebrating a decade of the International GPS Service Symposium 01/03/2004 05/03/2004 Berne Suisse Importance : 256 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] antenne GNSS
[Termes IGN] Global Navigation Satellite System
[Termes IGN] intégrité des données
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] maintenance
[Termes IGN] orbitographie
[Termes IGN] propagation ionosphérique
[Termes IGN] réseau géodésique permanent
[Termes IGN] temps réel
[Termes IGN] transmission de donnéesNote de contenu : SESSION 1: IGS Reference Frame Maintenance / G. Gendt
IGS Reference Frame Maintenance (Position Paper) / R. Ferland, G. Gendt, T. Schöne
**Oral Presentations
Environmental Issues and Monumentation / Y. Bock
Current Challenges of Monitoring Station Height with GPS / D. Dong, M. Heflin
IERS Rigorous Inter-Technique Combination Implications to IGS / M. Rothacher, D. Thaller, R. Schmid, P. Steigenberger
Detection and Handling of EPN Station Irregularities / C. Bruyninx, G. Carpentier, F. Roosbeek, A. Kenyeres
**Poster Presentations
Contribution to EUREF of the ASI (Agenzia Spaziale Italiana) Matera Space Geodesy Centre “G.Colombo” (CGS) / C. Ferraro, A. Nardi, G. Bianco, F. Vespe
Discontinuities in the IGS Tracking Stations Coordinate Time Series / P. J. Mendes Cerveira, R. Weber
GPS Time Series and Sea Level / M. Poutanen, H. Koivula, M. Tervo, K. Kahma, M. Ollikainen, H. Virtanen
Hafelekar GPS Permanent Station Seasonal Monitoring / G. Stangl, C. Haslinger, E. Cristea
IGS Tide Gauge Benchmark Monitoring Pilot Project / T. Schöne
Processing, Combination and Time Series Analysis of Continuous GPS Data: A Test Study / M. E. Ayhan, C. Demir, A. Kilicoglu, A. Cingoz, B. Aktug, A. Kurt, H. Yildiz
SESSION 2: Other Reference Frame Issues
IGS Reference Frames: Status and Future Improvements (Position Paper) / J. Ray, D. Dong, Z. Altamimi
**Oral Presentations
Observations of Large-scale Frame Deformations and Related Effects / T. Herring
Relationships between Mass Redistribution, Station Position, Geocenter, and Earth Rotation: Results from IGS GNAAC Analysis / G. Blewitt
Tests of IGS Reference Frame Stability / Z. Altamimi, J. Ray
The Effect of the Second Order GPS Ionospheric Correction on Receiver Positions / S. Kedar, G. Hajj, B. Wilson, M. Heflin
Improving IGS Timescale Stability and Tracking of UTC / K. Senior, J. Ray
**Poster Presentations
CERGOP-2/Environment / P. Pesec
CODE High-rate GPS Satellite Clock Corrections / H. Bock, R. Dach, U. Hugentobler, S. Schaer, G. Beutler
Continuously Operating GPS Receivers at Thule, Greenland / S. A. Khan, F. B. Madsen, P. Knudsen
IENG: A New IGS Station in Italy / V. Pettiti, D. Orgiazzi
Reprocessing of the Global GPS Network: First Results / M. Rothacher, P. Steigenberger, R. Dietrich, M. Fritsche, A. Rülke
Rigorous Combination of GPS and VLBI to Study Reference Frame Related Issues / M. Krügel, V. Tesmer, D. Angermann, D. Thaller, M. Rothacher, R. Schmid
Seasonal Height Errors and the TRF / A. E. Niell
Swedish Activities During 10 Years as a Data Provider and Customer of the IGS: Geophysical and Geodetic Applications / J. Johansson, H.-G. Scherneck, M. Lidberg, R. Haas, S. Bergstrand, L. Jivall
The Impact of Auto- and Cross-correlations in Daily Solution Time Series of GPS Permanent Stations / R. Barzaghi, A. Borghi, M. Crespi, F. Giannone, G. Pietrantonio, F. Riguzzi
SESSION 3: Real Time Aspects
Session Summary / M. Caissy
Real-Time Data Flow and Product Generation for GNSS (Position Paper) / R. Muellerschoen, M. Caissy
**Oral Presentations
IGS Real-time Network Prototype / M. Caissy
Real Time Aspects, the JPL Perspective / R. Muellerschoen
Global Products for GPS Point Positioning Approaching Real-Time / Y. Gao, P. Heroux, M. Caissy
The EUREF-IP Ntrip Broadcaster: Real-time GNSS data for Europe / D. Dettmering, G. Weber
ESA/ESOC Real Time Infrastructure / C. Garcia, J. Dow, J. Perez, I. Romero
**Poster Presentations
A HTTP Based Technique for Streaming GNSS Data over the Internet / H. Gebhard
GFZ's Development of GPS Real-Time Network / R. Galas, W. Köhler
Impact of Imperfect Orbit on Ground-based GPS Atmospheric Sounding Applications / P. Fang, Y. Bock, S. Gutman
Real-Time IGS Protocol, Formats and Software Tools / K. MacLeod, M. Caissy, R. Fong, B. Twilley, J. P. Bartolome, C. Garcia-Martinez, R. Galas, R. Muellerschoen
Real-Time Wide-Area Differential GPS Corrections from Natural Resources Canada / P. Collins, F. Lahaye, K. MacLeod, Y. Mireault, P. Héroux
Swedish Activities during 10 Years as a Data Provider and Customer of the IGS: Real time Applications / C. Rieck, P. Jarlemark, R. Emardson, J. Johansson, B. Stoew, A. Frisk
SESSION 4: Network Issues
Session Summary / A. Moore, C. Bruyninx, R. Twilley
Network Issues (Position Paper) / A. Moore, C. Bruyninx, R. Twilley
IGS Network Issues 2002-2004, Update Since Ottawa Workshop / M. Schmidt, A. Moore
**Oral Presentations
Status of AFREF Project / Z. Altamimi
North Eurasian GPS Deformation Array, History and Current State / G. Steblov
Working with the IGS Network: The ESA/ESOC Experience / I. Romero, C. Garcia, J. Dow
South Pacific Regional GPS Network / B. Twilley
**Poster Presentations
Activities of the Astrogeodetic Observatory in Jozefoslaw in the Last Decade / J. B. Rogowski, J. Bogusz, M. Figurski, M. Kêk, M. Kruczyk, L. Kujawa, W. Kurka, T. Liwosz
EPN Network Coordination / C. Bruyninx, G. Carpentier, F. Roosbeek
EUPOS - a new European Initiative of Establishment of the Multifunctional Reference Station System in Central and Eastern European Countries / J. Sledzinski
Korean GPS Network (KGN) Activities / P.-H. Park, K.-D. Park, J.-U. Park
On the use of Non-Permanent GPS Stations for Geokinematics / J. Krynski, Y. M. Zanimonskiy
South Pacific Regional GPS Network / B. Twilley, J. Manning, R. Govind
Sub-Daily Site Coordinates Variations in EUREF Permanent Network /J. Hefty, M. Kovac, M. Igondova, M. Hrcka
UNAVCO Support to the GPS Global Network (GGN) and the International GPS Service / O. Ruud, D. Stowers, S. Fisher, C. Meertens, V. Andreatta
SESSION 5: Data Transfer and Data Centers
Session Summary / C. Noll, C. Meertens
Enhancing the IGS Data and Products Infrastructure ? A Data Center Perspective (Position Paper) / M. Scharber, C. Noll
**Oral Presentations
Addition of Real-Time Capability to the Japanese Dense GPS Network / Y. Hatanaka, A. Yamagiwa, M. Iwata, S. Otaki
The Role of IGS Data Centers and Real-Time Data / R. Muellerschoen, M. Caissy
New and Adapted Technologies for the Plate Boundary Observatory / G. Anderson, K. Bohnenstiehl, D. Mencin, M. Jackson
New Server Concept at the BKG Data Centre / H. Habrich
SOPAC IT Developments / Y. Bock, P. Fang, B. Gilmore, P. Jamason, D. Malveaux, R. Nikolaidis, L. Prawirodirdjo, M. Scharber
**Poster Presentations
Availability and Completeness of IGS/IGLOS Tracking Data / S. Schaer, M. Meindl
ESA / ESOC IGS Activities / J. Dow, C. Garcia, I. Romero, J. Feltens, R. Gautschi, J. Perez, E. Rojo, H. Boomkamp
Proposing to Host the Fourth Global Data Center at Korea Astronomy Observatory / P.-H. Park, K.-D. Park, J.-U. Park, H.-C. Lim, J.-H. Joh
The CERGOP2 Database - Information for Geodynamic in Central Europe / G. Stangl, P. Pesec, E. Cristea
The IGS Global Data Center at the CDDIS ? An Update / C. Noll, M. Dube
SESSION 6: Integrity Monitoring of IGS Products
Session Summary / J. Zumberge
Integrity Monitoring of IGS Products (Position Paper) / J.F. Zumberge, H.-P. Plag
**Oral Presentations
GNSS Integrity Concept / B. Lobert
Products Produced Under the Direction of the AC Coordinator: Processes, Accuracies and Quality Control / G. Gendt
The Use and Integrity Monitoring of IGS Products at Geoscience Australia / R. Govind, J. Dawson, J. Manning
**Poster Presentations
Modelling of GPS Satellite Clocks and Comparisons of IGU Clock Products / V. Bröderbauer, R. Weber
Routine GPS Data Quality Check at GFZ Potsdam / M. Ramatschi, R. Galas
Zero Difference Residuals for Multipath Maps and ZTD Quality Indication / B. Gundlich, H. van der Marel
IGS 10th Anniversary Symposium
International GPS Service and International Association of Geodesy
The Accomplishments of the IGS and their Implications on the Future of Geodesy / G. Beutler
The IGS Strategic Plan and Future / J. Dow
Role of IGS - National Mapping Agency Perspective / B. Engen, N. Beck
Scientific Research and Applications
Earth Science Research and Applications: Geodetic Infrastructure as Enabling Technology / A. Donnellan
Forecast Systems Laboratory: Transferring Science and Technology to Operational Weather Services / B. Serafin
Gravity and Satellite Missions / C. Reigber
Monitoring Crustal Deformations in an Island Arc / K. Heki
GNSS Systems
GPS Policy, Management & Modernization / D. Turner
Galileo and the European Developments / J. Tjaden
The Galileo Program Status / S. Houg
Developments of the Glonass System and Glonass Service / S. G. Revnivykh
International Cooperation, Education and Outreach
US ? EU Cooperation / K. Hodgkins
GNSS- The International Future: Building Upon the Synergy between the Work of COPUOS and Capacity-building Activities of the UN Program on Space Applications / K. Hodgkins
Industry Perspectives on IGS Collaboration, Impact and Influence ? Past, Present and Future / G. T. Johnston
The IGS and the Education of the Next Generation of Users / C. Rizos
Kinematics of Deformation in the Tibetan Plateau and its Margins Constrained by GPS Measurements / P.-Z. Zhang, Z. Niu
Improving the GPS L1 Signal / T. Stansell
Summary of the IGS Symposium and Panel Discussion ? “Visions for the Future” / R. Neilan
SESSION 7: Global Navigation Satellite Systems I
Session Summary / J. Dow, R. Weber
**Oral Presentations
GNSS Modernization / D. Turner
Timing Applications for GNSS ? IGS Partnership with the BIPM / E. Felicitas Arias, G. Petit
Risk Mitigation in the Ground Mission Segment Using the Galileo System Test Bed / M. Falcone, M. Lugert
GSTB-V1: The First Step Towards the Development of Galileo Navigation Algorithms / Á. M. García, M. Romay Merino, C. H. Medel, A. Cezón Moro
The IGS GNSS Working Group ? Charter and Plans / R. Weber
**Poster Presentations
A Software Tool to Evaluate Navigation Performances at Application Level / A. Gavin
SESSION 8: Global Navigation Satellite Systems II
Session Summary / J. Slater
**Oral Presentations
The ITRF/Galileo Interface / C. Boucher
Time and Frequency Transfer Using GNSS / P. Defraigne, C. Bruyninx, A. Moudrak, F. Roosbeek
GPS/GLONASS Antennas and Ground Planes: Size and Weight Reduction Perspectives / D. Tatarnikov, V. Filippov, I. Soutiaguine, A. Astahov, A. Stepanenko
The IGLOS Pilot Project ? Transitioning an Experiment into an Operational Service / J. Slater, R. Weber, E. Fragner
GNSS Analysis at CODE / S. Schaer, U. Hugentobler, R. Dach, M. Meindl, H. Bock, C. Urschl, G. Beutler
**Poster Presentations
C/A Code Biases in High-end Receivers / A. Simsky, J.-M. Sleewaegen
GLONASS Data Analysis for IGS / H. Habrich, P. Neumaier, K. Fischer
Impact of Galileo on Geodetic Positioning Applications / H. van der Marel, S. Verhagen, P. Joosten
SESSION 9: Precise Orbit Determination
Session Summary / H. Boomkamp
Bigger, Better, Faster POD (Position Paper) / H. Boomkamp, R. König
**Oral Presentations
High-performance Algorithms for Double Difference Data Processing / H. Boomkamp, J. Dow
Combined Solutions GPS+LEO / R. König, C. Reigber, S. Zhu
Aspects of Large Station Networks for GPS Orbits and Clocks / T. Herring
Routine Processing of Combined Solutions for GPS and GLONASS at CODE / U. Hugentobler, S. Schaer, R. Dach, M. Meindl, C. Urschl
Ultra-rapids and Ultra-rapids Predictions for GPS / J. Doua, L. Mervart
**Poster Presentations
GPS LEO POD Activity at CGS (Space Geodesy Centre “G. Colombo”) / A. Nardi, G. Bianco
Activities at the CODE Analysis Center / S. Schaer, U. Hugentobler, R. Dach, M. Meindl, H. Bock, C. Urschl, A. Jaeggi, P. Fridez, G. Beutler
A High Precision Analytical Surface Force Model For GPS Block IIR Satellites / M. Ziebart, S. Adhya, A. Sibthorpe, S. Edwards, P. Cross
High and Low POD Using GPS at CNES/GRGS / S. Loyer, F. Perosanz, S. Bruinsma, F. Mercier
Orbit Determination of Low Earth Satellites at AIUB / A. Jäggi, H. Bock, U. Hugentobler, G. Beutler
NRCan Analysis Centre Contributions to the IGS: 1994 ? 2004 / B. Donahue, Y. Mireault, C. Huot, P. Tétreault, J. Kouba
Kinematic Orbits for LEO Satellites - a New Product / D. Svehla, M. Rothacher
USNO Analysis Strategy Summary / V. J. Slabinski, J. R. Rohde, M. S. Carter, A. E. Myers, D. Pascu, W. H. Wooden
Large Scale GPS Processing at ESOC for LEO, GNSS and Real-Time Applications / H. Boomkamp, J. Dow
IGS LEO Pilot Project / H. Boomkamp
Kinematic LEO POD with Space- and Ground-Based Transceiver Constellation Tightly Coupled with GPS: Simulation Study / D. Grejner-Brzezinska, M. Bevis, C.-K. Hong, T.-S. Bae, J. LaMance, C. Rizos
IGS Analysis Center at GFZ Potsdam / M. Ge, F. Zhang, M. Ramatschi
SESSION 10: Antenna Effects
Session Summary / R. Schmid, G. Mader, T. Herring
From Relative to Absolute Antenna Phase Center Corrections (Position Paper) / R. Schmid, G. Mader, T. Herring
**Oral Presentations
New Anechoic Chamber Results and Comparison with Field and Robot Techniques / B. Görres, J. Campbell, M. Siemes, M. Becker
Estimation and Validation of the IGS Absolute Antenna Phase Center Variations / M. Ge, G. Gendt
Impact of Absolute Antenna Phase Center Corrections on Global GPS Solutions / R. Schmid, D. Thaller, P. Steigenberger, M. Rothacher, M. Krügel
The Effect of SCIGN Domes on the Vertical Phase Centre Position in Routine Processing of GPS Data / H. Dragert, M. Schmidt
Local Monitoring of a Fundamental GPS Site / M. Rothacher, V. Lechner, W. Schlüter
**Poster Presentations
Absolute Field Calibration of Carrier Phase Multipath / F. Dilßner, G. Seeber, U. Feldmann, G. Wübbena, M. Schmitz, M. Bachmann
The Effect of SCIGN Domes on the Vertical Phase Centre Position in Routine Processing of GPS Data / H. Dragert, M. Schmidt
The Impact of the PCV Parameters in the Coordinates Estimate / R. Barzaghi, A. Borghi
SESSION 11: Ground-Based Neutral Atmosphere and Ionosphere Sounding
Session Summary (Ionosphere Part) / H. Hernández-Pajares
IGS Ionosphere WG Status Report: Performance of IGS Ionosphere TEC Maps (Position Paper) / M. Hernández-Pajares
IGS Tropospheric Products and Services at a Crossroad (Position Paper) / Y. Bar-Sever
**Oral Presentations
GNSS Ionosphere Analysis at CODE / S. Schaer
Usage of IGS TEC Maps to Explain RF Link Degradations by Spread-F, Observed on Cluster and Other ESA Spacecraft / J. Feltens, J. Dow, G. Billig, D. Fornarelli, S. Pallaschke, B. Smeds, H.-J. Volpp, P. Escoubet, H. Laakso
Global Ionospheric Data Assimilation & IGS Collaboration with Space Weather Programs / B. Wilson, C. Wang, G. Hajj, X. Pi, L. Mandrake, A. Komjathy, A. Mannucci
gAGE/UPC GNSS Ionosphere Activities: Real-time, Galileo, EGNOS and Tomography / M. Hernández-Pajares, J. M. Juan, J. Sanz, A. Aragon, M. Garcia, R. Orus, P. Roldan
**Poster Presentations
Activities of Swisstopo in GPS Meteorology / E. Brockmann, D. Ineichen, G. Guerova, J.-M. Bettems, A. Somieski, M. Troller, M. Becker, P. Haefele
Determination of Ionospheric Delays of GPS Signals on the Basis of Measuring Results Obtained by a Single-Frequency Receiver / M. Kaufman, S. Pasynok, D. Filonov
GIM Models for Single Frequency Radar Altimetry / T. Schöne, S. Esselborn
GPS Ionosphere Rapid Service for Europe ? Suggestions and First Experiences / M. Figurski, J. B. Rogowski
GPS Tomography and Remote Sensing Techniques for Water Vapor Determination in the ESCOMPTE Campaign / S. Lutz, M. Troller, A. Somieski, A. Walpersdorf, E. Doerflinger, A. Geiger, B. Bürki, O. Bock, H.-G. Kahle
Mapping Function Parameters Derived from Numerical Weather Model Data in Global GPS Network Analyses ? A Comparative Study / S. Vey, A. Rülke, R. Dietrich, M. Rothacher
MATRAG ? Measurement of Alpine Tropospheric Delay by Radiometer and GPS / P. Häfele, M. Becker, E. Brockmann, L. Martin, M. Kirchner
Modeling and Forecasting of TEC Obtained with IGS Network over Europe / A. Krankowski, L.W. Baran, I.I. Shagimuratov
Swedish Activities During 10 Years as a Data Provider and Customer of the IGS: Atmospheric Monitoring / B. Stoew, G. Elgered, R. Emardson, L. Gradinarsky, R. Haas, P. Jarlemark, J. Johansson
VMF and IMF Mapping Functions Based on Data from the ECMWF / H. Schuh, J. BoehmNuméro de notice : 14032 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Actes Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=34650 Contient
- IGS reference frames: status and future improvements / Jim Ray (2004)
- Tests of IGS Reference Frame Stability / Zuheir Altamimi (2004)
- Status of AFREF Project / Jim Ray (2004)
- GPS Tomography and Remote Sensing Techniques for Water Vapor Determination in the ESCOMPTE Campaign / Beat Bürki (2004)
- The ITRF/Galileo Interface / Claude Boucher (2004)
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Code-barres Cote Support Localisation Section Disponibilité 14032-01 CG2004 Livre Centre de documentation Congrès Disponible 14032-02 CG2004 Livre Centre de documentation Congrès Disponible GPS based determination of the integrated and spatially distributed water vapor in the troposphere / Marc Troller (2004)
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Titre : GPS based determination of the integrated and spatially distributed water vapor in the troposphere Type de document : Thèse/HDR Auteurs : Marc Troller, Auteur Editeur : Zurich : Schweizerischen Geodatischen Kommission / Commission Géodésique Suisse Année de publication : 2004 Collection : Geodätisch-Geophysikalische Arbeiten in der Schweiz, ISSN 0257-1722 num. 67 Importance : 172 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-908440-10-9 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] correction troposphérique
[Termes IGN] distribution spatiale
[Termes IGN] modèle atmosphérique
[Termes IGN] positionnement par GPS
[Termes IGN] propagation troposphérique
[Termes IGN] Suisse
[Termes IGN] teneur en vapeur d'eau
[Termes IGN] tomographie
[Termes IGN] traitement du signal
[Termes IGN] troposphère
[Termes IGN] vapeur d'eauIndex. décimale : 30.84 Applications de géodésie spatiale à l'atmosphère Résumé : (Auteur) Climate change and global warming have become a major challenge for the sustainable development of our Earth and its environment. Intensive research is carried out to understand atmospheric processes and their implications. In this content, water vapor plays a key role. It is an important component of the global energy balance and is involved in many chemical reactions. In microwave measurements, the tropospheric refractivity causes a delay in the arrival of the signal propagating through the atmosphere. This refraction effect is one of the limiting factors in accurate GPS positioning. The tropospheric path delay can be decomposed into a dry and wet part, where the latter part is coupled with the integrated precipitable water vapor above the GPS receiver.
On the one hand, the refraction effect has to be corrected for GPS measurements, on the other hand, it is a valuable signal to determine the spatial distribution of the water vapor. This study investigates both aspects. For the first part, two basic approaches are looked into: One method is based on meteorological measurements. Thereby, the integrated amount of water vapor and its temporal variation are the prime target. The other concept makes use of long-term GPS measurements. The arrival delay of the GPS signals are used, to estimate the integrated amount of water vapor. This result can then be the basis to determine its spatial distribution and temporal behavior. The investigation is based on a tomographic approach and forms the main content of part 2 of this work.
In part 1, an extension of the software package COMEDIE is developed and applied to determine tropospheric path delays. COMEDIE allows a four-dimensional modeling (in space and time) of the meteorological parameters air pressure, temperature and water vapor pressure using a collocation approach. Integrating the meteorological parameters, tropospheric path delays are obtained. Evaluations and comparisons in Switzerland show the performance of this method. An overall good agreement was achieved compared to GPS-estimated path delays. The accuracy depends on the season, and is in the range of 1-2 cm for the tropospheric path delay.
Continuous GPS measurements allow to estimate tropospheric path delays in the GPS processing. In a second approach of part 1, a method based on such GPS-estimated path delays is developed. It uses - like COMEDIE - a four-dimensional model and a collocation adjustment to estimate tropospheric path delays at desired locations. Evaluations are carried out in the area of Switzerland using the permanent GPS network AGNES. Long-term time series of cross-correlations are analyzed. An accuracy of 0.5 - 1.5 cm is obtained.
To resolve the GPS-estimated water vapor in the vertical, a tomographic approach is investigated in part 2 of this study. It is based on the assimilation of GPS double-difference observations. The wet refractivity field is determined applying a least-squares adjustment. To test the performance of the software, different weather conditions are simulated. Various stochastically constrained models are applied and discussed in terms of inversion stability. Results from real data gathered during a dedicated measurement campaign in the high density GPS network of the Big Island of Hawaii are analyzed. Compared to radiosondes, an accuracy of about 10 ppm (refractivity units) is achieved.
To compare the potential and limits of the investigated methods, independent data must be available. An extensive study is performed in the area of Switzerland to evaluate and compare all presented methods with each other. For the validation, data of the numerical weather model aLMo are used. Seven days of data in a high spatial distribution and on an hourly basis are investigated. The tropospheric path delays resulting from the various methods are compared and analyzed. An overall good agreement with the aLMo data was observed. To evaluate the spatial distribution of water vapor, 7680 refractivity profiles are determined with the tomographic method and compared with the numerical weather data. The analysis contains four tomographic approaches including different types of constraints. The results are statistically evaluated and compared. A correlation between the accuracy and the weather situation was found. Overall, an agreement of 5-7 ppm (refractivity units) was achieved compared to aLMo.
In conclusion, it can be stated that the determination of the integrated amount of water vapor in the troposphere was successfully performed. For the main geodetic application, the correction of GPS measurements, the estimation of path delays in the GPS processing is recommended, provided long-terrn GPS phase observations are available. For the determination of the spatial distribution and the temporal variation of the integrated amount of water vapor, modeling of the GPS-estimated path delays is a successful method. Moreover, the principal feasibility to resolve the vertical distribution of the water vapor applying the tomographic approach was demonstrated. However, further investigations concerning constraints or the introduction of additional information are required.Numéro de notice : 13264 Affiliation des auteurs : non IGN Autre URL associée : http://dx.doi.org/10.3929/ethz-a-004796376 Thématique : POSITIONNEMENT Nature : Thèse étrangère DOI : 10.3929/ethz-a-004796376 En ligne : https://www.sgc.ethz.ch/sgc-volumes/sgk-67.pdf Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=54945 Réservation
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Titre : GPS satellite surveying Type de document : Guide/Manuel Auteurs : Alfred Leick, Auteur Mention d'édition : 3 Editeur : New York, Londres, Hoboken (New Jersey), ... : John Wiley & Sons Année de publication : 2004 Importance : 436 p. Format : 16 x 24 cm ISBN/ISSN/EAN : 978-0-471-05930-1 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] ambiguïté entière
[Termes IGN] compensation de coordonnées
[Termes IGN] compensation Lambda
[Termes IGN] compensation par moindres carrés
[Termes IGN] correction ionosphérique
[Termes IGN] correction troposphérique
[Termes IGN] Galileo
[Termes IGN] Global Orbitography Navigation Satellite System
[Termes IGN] Global Positioning System
[Termes IGN] mesurage de phase
[Termes IGN] mesurage de pseudo-distance
[Termes IGN] orbitographie
[Termes IGN] phase GPS
[Termes IGN] positionnement absolu
[Termes IGN] positionnement cinématique
[Termes IGN] positionnement différentiel
[Termes IGN] positionnement dynamique
[Termes IGN] positionnement par GNSS
[Termes IGN] positionnement par GPS
[Termes IGN] positionnement statique
[Termes IGN] propagation ionosphérique
[Termes IGN] propagation troposphérique
[Termes IGN] signal GPS
[Termes IGN] surface de référence
[Termes IGN] système de positionnement par satellites
[Termes IGN] système de référence géodésique
[Termes IGN] traitement de données GNSSIndex. décimale : 30.61 Systèmes de Positionnement par Satellites du GNSS Résumé : (Editeur) This new edition is thoroughly updated to reflect extensive changes in Global Positioning Systems, and is the first GPS book to integrate data from Russian GLONASS and European GALILEO GPS systems into U.S GPS data and procedures. Note de contenu : Preface. Acknowledgements. Abbreviations.
Chapter 1. Introduction.
Chapter 2. Geodetic Reference Systems.
Chapter 3. Satellite Systems.
Chapter 4. LSQ Adjustments.
Chapter 5. Pseudorange and Career Phase Observiables.
Chapter 6. Troposphere and Ionosphere.
Chapter 7. Processing Pseudoranges and Career Phases.
Chapter 8. Network Adjustments.
Chapter 9. Two-Dimensional Geodetic Models.
Appendix A. General Background.
Appendix B. The Ellipsoïd.
Appendix C. Conformal Mapping. References. Spelling Dictionary.Numéro de notice : 12163 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Manuel de cours Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=54566 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 12163-01 30.61 Livre Centre de documentation Géodésie Disponible 12163-04 30.61 Livre Centre de documentation Géodésie Disponible 12163-02 DEP-ELG Livre Marne-la-Vallée Dépôt en unité Exclu du prêt 12163-03 DEP-ELG Livre Marne-la-Vallée Dépôt en unité Exclu du prêt PermalinkPermalinkPermalinkRapport du directeur sur l'activité et la gestion du Bureau International des Poids et Mesures (BIPM), 1er juillet 2003 - 30 juin 2004 / Bureau international des poids et mesures (2004)
PermalinkPermalinkA study of scattering from an object below a rough surface / Joel T. Johnson in IEEE Transactions on geoscience and remote sensing, vol 42 n° 1 (January 2004)
PermalinkPermalinkThéorie et traitement du signal, 2. Méthodes de base pour l'analyse et le traitement du signal / Messaoud Benidir (2004)
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