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Titre : International VLBI Service for Geodesy and Astrometry 2005 annual report Type de document : Rapport Auteurs : Dirk Behrend, Éditeur scientifique ; Karen D. Baver, Éditeur scientifique Editeur : Washington : National Aeronautics and Space Administration NASA Année de publication : 2006 Importance : 354 p. Format : 21 x 28 cm Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] astrométrie
[Termes IGN] géodynamique
[Termes IGN] interférométrie à très grande base
[Termes IGN] orientation de la Terre
[Termes IGN] radioastronomie
[Termes IGN] repère de référence
[Termes IGN] rotation de la Terre
[Termes IGN] système de référence céleste
[Termes IGN] système de référence mondialNuméro de notice : 24941 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Rapport d'activité En ligne : http://ivscc.gsfc.nasa.gov/publications/annualreport.html Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=92889 Report on the Symposium of the IAG Subcommission for Europe (EUREF) held in Riga, 14 - 17 June 2006 & reports of the EUREF technical working group, EUREF publication n° 16 / Joao Agria Torres (2006)
Titre : Report on the Symposium of the IAG Subcommission for Europe (EUREF) held in Riga, 14 - 17 June 2006 & reports of the EUREF technical working group, EUREF publication n° 16 Type de document : Actes de congrès Auteurs : Joao Agria Torres, Éditeur scientifique ; Helmut Hornik, Éditeur scientifique ; International association of geodesy, Auteur Editeur : Francfort sur le Main : Bundesamt für Kartographie und Geodäsie Année de publication : 2006 Collection : Mitteilungen des Bundesamtes für Kartographie und Geodäsie, ISSN 1436-3445 num. 40 Conférence : EUREF 2006, symposium of the IAG Subcommission for Europe 14/06/2006 17/06/2006 Riga Lettonie Importance : 430 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-89888-845-5 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] EUREF
[Termes IGN] Europe (géographie politique)
[Termes IGN] European Terrestrial Reference Frame
[Termes IGN] European vertical GPS reference network
[Termes IGN] Global Positioning System
[Termes IGN] interférométrie
[Termes IGN] réseau permanent EUREF
[Termes IGN] système de référence géodésiqueRésumé : (Documentaliste) Ce rapport fait le point sur le réseau permanent européen de stations GPS et présente ses résultats. Il s'intéresse aussi au réseau européen altimétrique. Les projets de la sous-commission sont décrits ainsi que les améliorations de l'ETRF. Les pays participants présentent leurs rapports sur leurs réseaux. Note de contenu : List of Publications of the IAG Sub-commission for Europe (EUREF)
Report on the Symposium of the IAG Sub-commission Europe (EUREF) in Riga, 14 - 17 June 2006
Opening Speech of the Prof. Dr. J. Balodis, Chairman of the Local Organizing Committee
Welcome Address on behalf of the Ministry of Defence / Z. grinpauks
Address by the President of IAG Sub-commission on Regional Reference Frames / Z. altamimi
Opening Speech / J. A. torres
Schedule /Agenda - Presentations - Participants - Minutes
Activities of the EUREF Technical Working Group (TWG)
- Status and Results of the EUVN Densification Action EUVN_DA Working Group / A. kenyeres M. sacher, J. ihde H. denker, U. marti
- European Vertical Reference System (EVRS) 2007 - a Combination of UELN and ECGN / J. ihde, M. sacher, J. makinen
European Vertical Reference System (EVRS) - Height Systems
- Status of UELN and steps on the way to EVRS 2007 / M. sacher, J. ihde, R. svensson
- The Baltic Levelling Ring / K. engsager, J. makinen, M. lilje, J. agren, P.-O. eriksson, P.-A. olsson, V. saaranen, K. schmidt, R. svensson, M. takalo, O. vestol
- The Swedish Height System RH 2000 as a National Realisation of EVRS / J. agren, R. svensson, P.-A. olsson, P.-O. eriksson, M. lilje
- The New Finnish Height System N2000 / V. saaranen, P. lehmuskoski, P. rouhiainen, M. takalo, J. makinen
- Realization of EUVN densification project in the Republic of Croatia / I. grgic, B. barisic, Z. hecimovic
- Determination of Geopotential W0 alicante and its Connection to W0 NAVD88 / M. J. SEVILLA DE LERMA, M. bur§a, D. DuSAtKO, S. kenyon, J. kouba, Z. si'ma, V. vatrt, M. vojtiskova
- DFHRS (Digital FEM Height Reference Surface) - A Rigorous Approach for the Integrated Adjustment and Fitting of Height Reference Surfaces / R. JAGER
Activities of the Expert Group on Geodesy (ExG-G)
- Continuously Operating Reference Station Network -A Future Strategy for Republic of Moldova / V. chiriac
- Status of INSPIRE Drafting Teams / H. habrich
EUREF Permanent Network (EPN) - Status, Analysis and Projects
- The EUREF Permanent Network: Recent Achievements / C. BRUYNINX, F. ROOSBEEK
- Development Process of EPN Analysis / H. HABRICH
- New Products of the EPN Time Series Special Project: Status Report / A. KENYERES
- EUREF-IP: From Pilot Project to Professional Service / D. DETTMERING, G. WEBER
- Account of the EPN Special Project "Troposphere Parameter Estimation" / W. SOHNE, H. HABRICH
EPN-Related Applications
The impact of the antenna mounting on the phase centre variation J. lesparre
GEONAS - The GEOdynamic Network of the Academy of Sciences of the Czech Republic: Permanent GNSS observations and routine data processing in the IRS operational centre
F. MANTLIK, V. SCHENK, Z. SCHENKOVA, P. KOTTNAUER, M. GRACOVA, Z. FUCIK
Implementation of ETRS89 / ETRF Improvements
National GPS Network of Bulgaria - processing the observations from the main order / I. georgiev, P. gabenski, G. gladkov, T. tashkov, P. danchev, D. dimitrov
Improvement and extension of ETRS 89 in Latvia and Lithuania based on the NKG 2003 GPS campaign / L. jivall, J. kaminskis, E. parseliunas
CROREF-05 GPS campaign - preliminary results / M. MARJANOVIC, Z. BACIC, T. BASIC
Results of re-processing of GPS data from EUREF-POL, POLREF and EUVN campaigns using EPN standards / J. krynski, M. figurski
Monitoring the Automated GPS Network of Switzerland AGNES / E. brockmann, S. grunig, D. ineichen, S. schaer
The First Austrian Velocity Field derived from GPS / C. haslinger, G.STANGL
Geodetic reference frames in the presence of crustal deformations - with focus on Nordic conditions / M. LlDBERG, J. M. JOHANSSON, H.-G. SCHERNECK
Adding geodetic strain rate data to seismogenic contexts in the Alps and Apennines / A. caporali, M. massironi, A. nardo
National Reports EUREF 06:
National Report of Austria / N. HOGGERL, D. RUESS, G. STANGL
National Report of Belgium / M. bavieri, C. bruyninx, S. lejeune, M. moins, E. pottiaux, F. roosbeek, P. voet, R. warnant
National Report of Croatia / M. BOSILJEVAC, M. MARJANOVIC, Z. BACIC, T. BASIC
National Report of Estonia / K. KOLLO, A. R0DJA, P. PlHLAK, R. VALLNER
National Report of Finland / M. OLLIKAINEN, J. JOKELA, M. POUTANEN, R. CHEN, M. TAKALO
National Report of France / F. DUQUENNE, A. HARMEL, H. DUQUENNE, B. GARAYT
National Report of Germany / J. ihde, U. faulhaber, H. habrich, G. liebsch, M. sacher, G. weber, H. wilmes
National Report of Great Britain / M. greaves, R. bingley, D. baker, G. appleby
Latvia National Report about Geodetic Activities / J. KAMINSKIS
National Report Malta / E. debono
National Report of Republic of Moldova / V. chiriac
National Report of the Netherlands / J. VAN BUREN, A. J. M. KOSTERS, J. LESPARRE, H. VAN DER MAREL
National Report of Poland to EUREF / J. krynski, J.B. rogowski, J.B. zielinski
National Report of Portugal / H. kol, M. vasconcelos, G. crisostomo, C. martins, A. medeiro
National Report of Slovakia / M. KLOBUSIAK, D. FERIANC, K. LEITMANNOVA, J. HEFTY
National Report of Sweden to the EUREF 2006 Symposium - geodetic activities at Lantmateriet, the National Land Survey of Sweden / L. jfvall, M. lidberg, J. agren, M. lilje, D. norin
National Report of Switzerland - New Developments in Swiss National Geodetic Surveying / A. wiget, E. brockmann, M. kistler, U. marti, A. schlatter, B. vogel, U. wild
National Report of Turkey / O. LENK
Other EUREF-Related Contributions
- A data set to test geoid computation methods / H. Duquenne
- Centimetre level of accuracy of the new quasigeoid in Poland / J. krynski, A. lyszkowicz
- GSP: Geodetic Component of the Galileo System / W. SOHNE, J. ihde, G. gend
Resolutions
Posters
A New Combined Height Reference Surface for Germany GCG05 / U. schirmer, H. denker, J. ihde, G. liebsch, J. muller
EUREF LAC GOP processing development in 2005-2006 / V. filler, J. dousa
Relative Positioning in Europe: Influence of the GPS+Galileo Satellite Geometry / M. moins, C. bruyninx
Updated Information on the Establishment of the European System of Reference Stations EUPOS / A. blaser , W. graszka, G. rosenthal, J. Sledzinski
Studies on accessibility and reliability of RTK measurements by internet / J.B. ROGOWSKI, L.KUJAWA, M.LESZCZYNSKI
The RAP Net: A Geodetic Positioning Network for Andalusia (South Spain) / M. berrocoso, R. paez, A. sanchez-alzola, A. perez-pena, M. E. ramjrez, Y. jimenez, A. hermosilla, M. redondo
Investigations of the GNSS Antennae Phase Centre Variations as the Influence of the Local Conditions Changes / J. cisak, Y. M. zanimonskiy, J. kapcia
GPS Reference Station Network of Latvia LATPOS / J. zvirgzds, J. kaminskis, L. LlEKSNE
GPS and GLONASS Data Analysis using Stations from the EUREF Permanent Network / C. bruyninx
Development of the Precise Levelling Network in Estonia / A. rudja
CERGOP GPS Data Processing and Analysis of the Results Related to the Region of the Balkans / K. vassileva
Closing Session
Closing Remarks of the EUREF-Symposium in Riga, 14-17 June 2006 / J.torres
Sketches / C. calvert
Reports of the EUREF Technical Working Group (TWG)
XXXXI* Meeting of the EUREF Technical Working Group in Riga, June 13,2006
Agenda - Participants - Minutes
XXXXIPd Meeting of the EUREF Technical Working Group in Frankfurt a.M., 6-7. November 2006
Agenda - Participants - Minutes
XXXXIII"1 Meeting of the EUREF Technical Working Group in Lisbon, 5. - 6. March 2007
Agenda - Participants - MinutesNuméro de notice : 15404 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Actes Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=34763 ContientRéservation
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Code-barres Cote Support Localisation Section Disponibilité 15404-02 CG2006 Livre Centre de documentation Congrès Disponible 15404-01 CG2006 Livre Centre de documentation Congrès Disponible Report on the symposium of the IAG Subcommission for Europe (EUREF) held in Vienna, 1 - 4 June 2005 & reports of the EUREF technical working group, EUREF publication n° 15 / Joao Agria Torres (2006)
Titre : Report on the symposium of the IAG Subcommission for Europe (EUREF) held in Vienna, 1 - 4 June 2005 & reports of the EUREF technical working group, EUREF publication n° 15 Type de document : Actes de congrès Auteurs : Joao Agria Torres, Éditeur scientifique ; Helmut Hornik, Éditeur scientifique ; International association of geodesy, Auteur Editeur : Francfort sur le Main : Bundesamt für Kartographie und Geodäsie Année de publication : 2006 Collection : Mitteilungen des Bundesamtes für Kartographie und Geodäsie, ISSN 1436-3445 num. 38 Conférence : EUREF 2005, symposium of the IAG Subcommission for Europe 01/06/2005 04/06/2005 Vienne Autriche Importance : 436 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-89888-799-1 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] EUREF
[Termes IGN] Europe (géographie politique)
[Termes IGN] European Terrestrial Reference Frame
[Termes IGN] European vertical GPS reference network
[Termes IGN] Global Positioning System
[Termes IGN] interférométrie
[Termes IGN] réseau permanent EUREF
[Termes IGN] système de référence géodésiqueNote de contenu : Publications of the IAG Sub-commission for Europe (EUREF)
1) Report on the Symposium of the 1AG Sub-commission for Europe (EUREF) in Vienna
Opening speech on behalf of the President of the Austrian Federal Office of Metrology and Surveying / H. König
Address by the President of IAG SubCommission on Regional Reference Frames / Z. ALTAMIMI
Opening Speech / J. A. TORRES
Schedule / Agenda
Participants
Minutes
1.1) Activities of the Technical Working Group (TWG) / Status of the EUREF Permanent Network (EPN)
Acceptance and use of ETRS89 / J. A. TORRES
Status of the EUREF Permanent Network / C. BRUYNINX
Can EU law benefit Geodesy ? / C.E. Calvert
1.2) EUREF Permanent Network : Analysis and Projects
New developments in EPN analysis / H. Habrich
EUREF LAC analysis at swisstopo/CODE using the Bernese GPS software version 5.0 / S. Schaer, D. Ineichen, E. Brockmann
Antenna tests at BEV Vienna 2002-2005 / G. Stangl, H. Titz
The importance of correct antenna calibration models for the EUREF permanent network / C. Völksen
Status report of the EPN specail project "Troposhere parameter estimation" / W. Söhne, G. Weber
Activities of the Expert Group on Geodesy (ExG-G)
Developing Railway Geodesy / T, engel
1.3) EPN related applications
Real-time RTK messages for permanent reference station applications standardized by RTCM / H.-J. euler
Netherlands Positioning Service (NETPOS) - A Real Time Kinematic Network for Governmental Authorities of the Netherlands / J. lesparre, J. v, buren
Time Series of GPS Stations in die Near East / C. haslinger, G. STANGL
A new GPS derived velocity field of the postglacial adjustment in Fennoscandia, and its implications for the maintenance of the European geodetic reference frame / M. LIDBERG, J.M. JOHANSSON
Adding Geodetic Strain Rate Data to a Seismogenic Context / A. caporali
Earth surface deformation in Germany following the Sumatra Dec 26, 2004 earthquake using 1 Hz GPS data / W. sohne, W, schwahn, J. ihde
1.4) Implementation of ETRS89 / ETRF improvements
Processing of the NKG 2003 GPS Campaign / L. jivall, M. lidberg. T. N0RBECH, M. weber
Results of the 3rd observation of the Swiss GPS Reference Network LV95 and status of the Swiss Combined Geodetic Network CH-CGN / E. brockmann, D. ineichen, U. marti, A. schlatter
Homogenisation of the Austrian field of control points - preparatory work for a higher absolute accuracy in cadastre / E. imrek
1.5) European Vertical Reference System (EVRS) / Height systems
Steps on the Way to UELN05 and Enhancements of the Web-based Geodetic Information and Service System / M. sacher, G. liebsch, J, ihde, J. luthardt
Spectral behavior of global gravitational models considering EUVN network / Z. HEtlMOVit
Regional Adjustment of Precise Levellings around the Baltic / J. makinen, M. lilje, J. agren, K. engsager, P.-O. eriksson, C. jepsen. P.-A. olsson, V. saaranen, K. schmidt, R. svensson, M. takalo, O. VEST0L
ECGN - Development of the European Combined Geodetic Network in Austria / D. RUESS
The Nordic Geodetic Observing System (NGOS) / M. poutanen, P. knudsen, M. lilje, T. N0RBECH, H.-P. plag, H.-G. scherneck
Status of the European Combined Geodetic Network (ECGN) / J. ihde, T. F. baker, C. bruyninx, J. ihde, T. F. baker, C. bruyninx, O. francis, M. amalvict, A. kenyeres, J. makinen, S. shipman, J. SlMEK, H. WlLMES, H. WZIONTEK
1.6) National reports
EUREF 05: National Report of Austria / N. hoggerl, E. imrek, E. klaffenbock, P. PESEC, D. RUESS, H. schuh, G. stangl, H. titz, R. weber, E. zahn 2
National Report of Belgium / C. bruyninx, G. carpentier, S. letoune, E. pottiaux, F. roosbeek, P. voet, R. warnant 2
Progress in the Bosnia and Herzegovina National Geodetic Control 2000-2005 / M. mulic
European Reference Frame in Bulgaria / G. milev, M. minchev. G. valev, M. matova, K. vassileva, P. gabenski
National Report of Croatia / M. bosiljevac, M. kekic, M. marjanovic
EUREF Related Activities in the Czech Republic 2004 - 2005 - National Report / J. SlMEK, J. kostelecky, J. kostelecky, J. provazek, J. reznicek, M. lederer, V. schenk, F. mantlik, Z. schenkova, P. kottnauer
National Report of Finland / M. OLLIKAINEN, J. JOKELA, R. CHEN, J. MAKINEN
National Report of Germany 2005 / J. ihde, U. faulhaber, H. habrich, G. liebsch, M. sacher, G. weber, H. wilmes
National Report of Great Britain, 2005 / M. greaves, R. BlNGLEY, D. BAKER, G. appleby
Annual Report Kosovo / M. meha
National Report of Latvia / J. kaminskis
Ongoing Developments of the Lithuanian National Geodetic Control / A. BuGA, R. KOLOSOVSKIS, R. obuchovski, E. parseliunas, P. petroskevicius, E. sleiteris, S. urbanas, A. zakarevicius
EUREF National Report of Moldova / M. ovdh, I. MONIN
National Report of the Netherlands / J. van buren, A. J. M. rosters, J. lesparre, H. van der marel
National Report of Poland to EUREF 2005 / J. krynski, J.B. rogowski, J.B. ZffiLlNSKI
National Report of Portugal / H. kol, M. vasconcelos, G. crisostomo, C. martins, A. medeirO
National Report of Slovenia / B. STOPAR
National Report of Spain - Institute Geografico Nacional / M. valdes, M. A. cano, J. A. sanchez , R. Qum6s
National Report of Sweden to the EUREF 2005 Symposium - geodetic activities at Lantmateriet the National Land Survey of Sweden / L. JlVALL, M. lidberg, M. LEJE, A. OLSSON
EUREF'05: National Report of Switzerland - New Developments in Swiss National Geodetic Surveying / D. SCHNEIDER, B. VOGEL, A. WlGET, U. WILD, E. BROCKMANN, U. MARTI, A. SCHLATTER
National Report of Turkey - 2005 / Y. CAGLAR
1.7) Other EUREF Related Contributions
Extension of the DFHRS approach for gravity observations and computation design
for a 1cm fitted DFHRS of Europe / R. jager, S. schneid
Galileo/GPS Receivers for Geodetic Applications / A. simsky, J.-M. sleewaegen
Resolutions
Posters
Analysis of the Coordinate Differences caused by Different Methods to align the Combined EUREF Solution to the ITRF / C. bruyninx, G. carpentier, P. defraigne
Displacement monitoring by GPS-RTK applying FIR filters / R. szpunar, J. walo
Impact of the Combined GPS + Galileo Satellite Geometry on Positioning Precision / S. daghay, M. moins, C. bruyninx, Y. rolain, F. roosbeek
Remarks on GPS Tropospheric Delay Products and their Usefulness / M. kruczyk
Troposphere Modeling in Local GPS Network / J. bosy, A. borkowski
Status of EUVN and EUVN_DA Projects in the Republic of Croatia / I. GRGKX B. BARlsiC, M. liker
Accuracy of the Last Precise Levelling Campaign in Poland / A. lyszkowicz, M. leonczyk
Did the new geopotential models improve the fit of gravimetric quasigeoid in Poland to GPS/levelling data? / J. krynski, A. lyszkowicz
Absolute Gravity Network in Spain / E. R. pujol, M. F. villalta
The Establishment of a Vertical Gravity Calibration Baseline in Tatra Mountains, New Adjustment
of the Polish Gravity Control Network / A. sas, M. cisak, J. makinen
Release of the new National Height Network of Switzerland LHN95 / A. SCHLATTER, U. MARTI, D. SCHNEIDER
Homogenisation of GPS fields in cities referring to the new positional datum of the Republic of Croatia / T. basiic, M. rezo, D. markovinovk
Analysis of the Euref Stations Stability on the Territory of Bulgaria / G. milev, K. vassileva, M. becker, M. kirchner
Closing session
2) Reports of the EUREF Technical Working Group (TWG)
2.1) XXXVIIIth Meeting of the EUREF Technical Working Group
Agenda
Participants
Minutes
2.2) XXXIXth Meeting of the EUREF Technical Working Group
Agenda
Participants
Minutes
2.3) XXXXth Meeting of the EUREF Technical Working Group
Agenda
MinutesNuméro de notice : 13431 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Actes Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=34640 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13431-02 CG2005 Livre Centre de documentation Congrès Disponible 13431-01 CG2005 Livre Centre de documentation Congrès Disponible
Titre : Status of DORIS Stations in Antarctica for Precise Geodesy Type de document : Article/Communication Auteurs : Martine Amalvict, Auteur ; Pascal Willis , Auteur ; K. Shibuya, Auteur Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2006 Collection : International Association of Geodesy Symposia, ISSN 0939-9585 num. 130 Conférence : IAG 2005, IAG Symposium IAG conference Dynamic Planet - Monitoring and Understanding a Dynamic Planet with Geodetic and Oceanographic Tools 22/08/2005 26/08/2005 Cairns Australie Proceedings Springer Importance : pp 94 - 102 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] Adélie, Terre
[Termes IGN] Antarctique
[Termes IGN] données DORIS
[Termes IGN] données GPS
[Termes IGN] données ITGB
[Termes IGN] gravimètre absolu
[Termes IGN] interférométrie à très grande base
[Termes IGN] levé gravimétrique
[Termes IGN] vitesse de déplacementRésumé : (auteur) Polar regions and especially Antarctica are nowadays recognised as exerting a major control upon the global Mean Sea Level (MSL) directly linked to climate changes. Monitoring and understanding the geodynamical behaviour of these regions is then of critical importance. The long-term displacement (or velocity) of reference sites helps constraining the ice sheet evolution prediction models. Several geodetic space techniques, such as GPS, observe displacements of such reference sites. In Antarctica, in addition to numerous GPS stations, four DORIS stations are permanently operating: Belgrano, Rothera, Syowa, Terre Adélie. In addition to the permanent DORIS stations, episodic DORIS campaigns took also place at Dome C / Concordia and on Sorsdal and Lambert glaciers. In this paper, we first present general information concerning the stations and the campaigns (exact location, period of measurements, etc). We then discuss the solutions obtained by different analysis centres (when available) for all DORIS stations in the Antarctic region. In particular, we use several ITRFs (from the early ITRF96 to ITRF2000) to see their impact on the derived velocities in Antarctica. An emphasis is given to the investigation and possible explanation of differences observed between each solution. Finally, we compare at these stations, the results of DORIS observations to the solutions from other geodetic techniques (GPS, VLBI) and to the results of repeated absolute gravity measurements (when available). Numéro de notice : C2005-042 Affiliation des auteurs : IGN+Ext (1940-2011) Thématique : POSITIONNEMENT Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1007/978-3-540-49350-1_17 En ligne : https://doi.org/10.1007/978-3-540-49350-1_17 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=102723 Is there utility in rigorous combinations of VLBI and GPS Earth orientation parameters? / Jim Ray in Journal of geodesy, vol 79 n° 9 (December 2005)
[article]
Titre : Is there utility in rigorous combinations of VLBI and GPS Earth orientation parameters? Type de document : Article/Communication Auteurs : Jim Ray, Auteur ; Jan Kouba, Auteur ; Zuheir Altamimi , Auteur Année de publication : 2005 Article en page(s) : pp 505 - 511 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] données GPS
[Termes IGN] données ITGB
[Termes IGN] orientation de la Terre
[Termes IGN] point de liaison (géodésie)
[Termes IGN] positionnement par GPS
[Termes IGN] positionnement par ITGB
[Termes IGN] série temporelle
[Termes IGN] système de référence mondialRésumé : (Auteur) Combinations of station coordinates and velocities from independent space-geodetic techniques have long been the standard method to realize robust global terrestrial reference frames (TRFs). In principle, the particular strengths of one observing method can compensate for weaknesses in others if the combination is properly constructed, suitable weights are found, and accurate co-location ties are available. More recently, the methodology has been extended to combine time-series of results at the normal equation level. This allows Earth orientation parameters (EOPs) to be included and aligned in a fully consistent way with the TRF. While the utility of such multi-technique combinations is generally recognized for the reference frame, the benefits for the EOPs are yet to be quantitatively assessed. In this contribution, which is a sequel to a recent paper on co-location ties (Ray and Altamimi in J Geod 79(4–5): 189–195, 2005), we have studied test combinations of very long baseline interferometry (VLBI) and Global Positioning System (GPS) time-series solutions to evaluate the effects on combined EOP measurements compared with geophysical excitations. One expects any effect to be small, considering that GPS dominates the polar motion estimates due to its relatively dense and uniform global network coverage, high precision, continuous daily sampling, and homogeneity, while VLBI alone observes UT1-UTC. Presently, although clearly desirable, we see no practical method to rigorously include the GPS estimates of length-of-day variations due to significant time-varying biases. Nevertheless, our results, which are the first of this type, indicate that more accurate polar motion from GPS contributes to improved UT1-UTC results from VLBI. The situation with combined polar motion is more complex. The VLBI data contribute directly only very slightly, if at all, with an impact that is probably affected by the weakness of the current VLBI networks (small size and sparseness) and the quality of local ties relating the VLBI and GPS frames. Instead, the VLBI polar motion information is used primarily in rotationally aligning the VLBI and GPS frames, thereby reducing the dependence on co-location tie information. Further research is needed to determine an optimal VLBI-GPS combination strategy that yields the highest quality EOP estimates. Improved local ties (including internal systematic effects within the techniques) will be critically important in such an effort. Copyright Springer Numéro de notice : A2005-596 Affiliation des auteurs : IGN (1940-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-005-0007-7 Date de publication en ligne : 10/11/2005 En ligne : http://dx.doi.org/10.1007/s00190-005-0007-7 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27727
in Journal of geodesy > vol 79 n° 9 (December 2005) . - pp 505 - 511[article]Réservation
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