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Home > Publications > IAG Newsletters > 2005 Issues

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2005-03-29

March 2005

posted by
Gyula Tóth
IAG Newsletter

March 2005

Editor: Gyula Tóth

IAG Communication and Outreach Branch

MTA-BME Research Group for Phys. Geod. and Geodyn.

 Department of Geodesy and Surveying

Budapest University of Technology and Economics

H-1521 Budapest, Hungary

Information Service of the International Association of Geodesy

http://www.iag-aig.org               newsletter@iag-aig.org

Contents

Meeting Announcements. 2

Dynamic Planet 2005. 2

IAG Sponsored Meetings. 2

EUREF Symposium 2005 Vienna. 2

Dynamic Planet 2005. 2

7th conference on Optical 3-D Measurement Techniques. 2

Summer School on Microgravimetric methods: static and dynamic aspects. 2

IAG Related Meetings. 3

GIS Planet 2005. 3

IAMAS 2005. 3

12th International Symposium on Deformation Measurement 3

4th Congress of the Balkan Geophysical Society. 3

IAG Sister Societies’ General Assemblies. 3

FIG Working Week and GSDI-8 – “From Pharaohs to Geoinformatics”. 3

SRTM Workshop and Special Issue of Journal of Photogrammetric Engineering & Remote Sensing (PE&RS) 4

ICC2005 Conference. 4

ISPRS Workshop Laser scanning 2005. 4

Book Review.. 4

Roberto Sabadini, Bert Vermeersen: Global Dynamics of the Earth: Applications of Normal Mode Relaxation Theory to Solid-Earth Geophysics. 4

Fast Bibliography. 6

 

The IAG Newsletter is under the editorial responsibility of the Communication and Outreach Branch (COB) of the  IAG.

It is an open forum and contributors are welcome to send material (preferably in electronic form) to the IAG COB (newsletter@iag-aig.org). These contributions should complement information sent by IAG officials or by IAG symposia organizers (reports and announcements). The IAG Newsletter is published monthly. It is available in different formats from the IAG new internet site: http://www.iag-aig.org

Each IAG Newsletter includes several of the following topics:

I.        news from the Bureau Members

II.      general information

III.    reports of IAG symposia

IV.    reports by commissions, special commissions or study groups

V.      symposia announcements

VI.    book reviews

VII.  fast bibliography

Books for review are the responsibility of:

C.C Tscherning

University of Copenhagen

Dept. of Geophysics

Copenhagen, Denmark

Fax: +45 35365357

E-mail: cct@gfy.ku.dk

 


 

Dynamic Planet 2005

Abstract deadline: May 6, 2005.

 

"Monitoring and Understanding a Dynamic Planet with Geodetic and Oceanographic Tools"

A Joint Assembly of the IAG, IAPSO and IABO

22 - 26 August 2005, Cairns, Australia

 

Scientists from all countries are invited to participate in this unique conference – a joint assembly of the International Association of Geodesy (IAG), International Association for Physical Sciences of the Oceans (IAPSO), and the International Association for Biological Oceanography (IBO). For further information, please visit the Dynamic Planet website http://www.dynamicplanet2005.com.

 

 

IAG Sponsored Meetings

1-4 June 2005, Vienna, Austria

The next regular EUREF 2005 Symposium will be held in Vienna, Austria, June 1-4, 2005. More detailed information please find updated on the Symposia homepage   http://euref2005.oeaw.ac.at/ .

"Monitoring and Understanding a Dynamic Planet with Geodetic and Oceanographic Tools"

A Joint Assembly of the IAG, IAPSO and IABO

22 - 26 August 2005, Cairns , Australia

Scientists from all countries are invited to participate in this unique conference – a joint assembly of the International Association of Geodesy (IAG), International Association for Physical Sciences of the Oceans (IAPSO), and the International Association for Biological Oceanography (IBO). For further information, please visit the Dynamic Planet website http://www.dynamicplanet2005.com.

3-5 October 2005, Vienna , Austria

The 7th conference on "Optical 3-D Measurement Techniques" will be held from October 3-5, 2005 in Vienna, Austria and is co-sponsored by the ISPRS Commission V, the FIG Commission 5 and 6, and the IAG Sub-commission 4.2. The conference website is: http://info.tuwien.ac.at/ingeo/optical3d/o3d.htm. The first announcement in pdf format can be downloaded from the conference website at: http://info.tuwien.ac.at/ingeo/optical3d/o3d1st.pdf.

Summer School on Microgravimetric methods: static and dynamic aspects

23-28 October, 2005, Lanzarote, Canaries

The International Gravimetric Bureau (BGI), the International Center for Earth Tides (ICET) and the Instituto de Astronomia y Geodesia (IAG) are pleased to announce their joint Summer School on Microgravimetric Methods: static and dynamic aspects. The request for information email is to: bernard.langellier@cnes.fr. Please also visit the BGI website for further details: http://bgi.cnes.fr

 

 

IAG Related Meetings

 

EGU General Assembly

24-29 April 2005, Vienna, Austria

The General Assembly of the European Geosciences Union (EGU) is held at the Austria Center Vienna (ACV) in Vienna, Austria, from 24 - 29 April 2005. The assembly is open to the scientists of all nations. The scientific programme of the General Assembly includes Union Symposia, Oral and Poster Sessions on disciplinary and interdisciplinary topics covering the full spectrum of the geosciences and the space and planetary sciences. The conference website can be reached at the following address:http://www.copernicus.org/EGU/ga/egu05/index.htm.

30 May- 2 June 2005, Estoril,  Lisboa Portugal

The II conference & exhibition on geographic information will take place Estoril Congress Centre, Lisboa Portugal. GIS PLANET is a global, independent and open event dedicated to Geographic Information. More information is available at http://www.gisplanet.org.

 

AOGS 2nd Annual Meeting 2005

20-24 June 2005, Suntec, Singapore

The Asia Oceania Geosciences Society (AOGS) will hold its 2nd Meeting on 20 to 24 June, 2005 at the Singapore Suntec City Convention Centre. In all, over 100 sessions in Solid Earth, Solar Terresterial, Planetary Science, Hydrological Science, Oceans & Atmospheres and Interdisciplinary Working Groups. Additionally, nearly all sections have an Open Category for garnering submissions of its own class. For more details please visit http://www.asiaoceania-conference.org/.

2-11 August 2005, Beijing, China

The International Association of Meteorology and Atmospheric Sciences (IAMAS), will hold its biennial Scientific Assembly in Beijing, China from 2-11 August 2005. The theme of the conference is The Fascinating Atmosphere: Changeable and Changing, and will cover all areas of meteorology and atmospheric sciences, including dynamics, radiation, chemistry, electricity, clouds and precipitation, and climate variability and change. Further details can be found on the IAMAS 2005 web site http://www.iamas2005.com.

12-15 September 2005, Qingdao , China

You are cordially invited to the 12th International Symposium on Deformation Measurements organized by Commission 6 of the International Federation of Surveyors (FIG) to be held in Qingdao, China, 12-15 September 2005. Please visit the conference website for further information: http://www.fig.net/isdm12.

9-12 October 2005, Bucharest , Romania

The International Conference and Exhibition “Geophysics Without Frontiers” is organized and hosted by the Romanian Society of Geophysics in cooperation with EAGE, SEG, EGU and AGU, under the auspices of the IUGG. The Congress focuses the attention of the whole community of geophysicists on Balkans. The conference webpage is  www.bgs-bucharest2005.ro.

 

IAG Sister Societies’ General Assemblies

 16-21 April 2005, Cairo , Egypt

Read more about technical and social programme, pre-conference workshops etc. at http://www.fig.net/cairo. The event is organized together with GSDI-8. Please visit the web site also for pre-conference workshops like the "Virtual Academy and the Surveying/Geoinformatics Community" to be held April 16, 2005.

 

SRTM Workshop and Special Issue of Journal of Photogrammetric Engineering & Remote Sensing (PE&RS)

14-16, June 2005, Reston, Virginia, USA

A workshop will be held June 14-16, 2005 in Reston, Virginia on SRTM Data Validation and Applications. Abstracts are due April 15, 2005. Details may be found at: http://edc.usgs.gov/conferences/SRTM/

 

Call for Papers: PE&RS Special Issue on on Mapping Mars, October 2005

This special issue of Photogrammetric Engineering & Remote Sensing (PE&RS) will focus on recent advancements in surveying and mapping of Mars. For further details, please visit http://www.asprs.org/publications/pers/call_for_papers.html

9-16 July 2005, A Coruña, Spain

The XXII International Cartographic Conference (ICC) is the most important event in the International Cartographic Association (ICA) calendar. Please visit http://www.icc2005.org for details.

12-14 September 2005, Enschede, the Netherlands

The workshop, held at the ITC in Enschede, will bring together an interdisciplinary group of researchers, system developers, data providers and end users to discuss and demonstrate recent developments in laser scanner data processing, the potential of the technique and future trends in sensorics and data processing. Further information on the workshop can be obtained from http://www.itc.nl/isprswgIII-3/laserscanning2005/.

 

 

Roberto Sabadini, Bert Vermeersen: Global Dynamics of the Earth: Applications of Normal Mode Relaxation Theory to Solid-Earth Geophysics

 

 

Title:                                       Global Dynamics of the Earth: Applications of Normal Mode Relaxation Theory to Solid-Earth Geophysics

Authors:                                Roberto Sabadini, Bert Vermeersen

Publisher:              Kluwer Academic Publishers/Springer

ISBN:                                     1-4020-1267-5 (hardcover), 1-4020-1268-3 (Paperback)

Year:                                       2004

Price:                      USD 99,00

Pages:                                    344 pages. 99 figures

Details:                                  hardcover/paperback

 

In accordance with its title, the book by R. Sabadini and B. Vermeersen covers a variety of global processes that can be described by the normal-mode theory of viscoelastic relaxation for a spherical Earth. As such, it clearly fills a gap in today's geophysical literature. Whereas edited books or comprehensive reviews covering particular aspects of the application of normal mode theory – in particular glacial-isostatic adjustment – appeared in the past, an overview covering all aspects of its application has been missing. In addition, the publication of this book book is also timely since – after a continuous development over more than 30 years – the normal-mode theory of viscoelastic relaxation has now reached a mature stage and approaches its limits. These are practically defined by the assumptions of spherical symmetry and incompressibility. While the justification of these assumptions when studying global processes must be carefully tested in each case, several theoretical studies have shown that normal-mode theory loses its power and elegance when giving up these assumptions and considering the viscoelastic relaxation of laterally heterogeneous, compressible Earth models. As a consequence, the authors' treatment is essentially restricted to lateral homogeneity and incompressibility.

The topic of Chapters 1 and 2 is the development of the field theory governing the viscoelastic relaxation of spherical Earth models for a variety of surface or internal forcings and the solution of the governing equations. The treatment is limited to Maxwell viscoelasticity, which continues to be the standard rheology in geodynamics. The basic solution techniques covered are spherical-harmonic expansion, correspondence principle, propagator-matrix technique and inverse Laplace transformation by means of the residue theorem. The main characteristics of the solution in the spectral domain for modal relaxation times and Love numbers are illustrated by a large number figures. 

In Chapters 3 and 4, the theory of forced rotational perturbations of the Earth – again for Maxwell viscoelasticity – is presented. The mathematical treatment is fairly detailed, and some discrepancies in the rotational theories developed during the last two decades are discussed – the latter perhaps not overly helpful for graduate students expecting an authorative theoretical presentation from a monograph. The solutions discussed apply to loading by Pleistocene ice sheets and allow the inference of lithosphere thickness and mantle viscosity from observations of polar wander and changes in length of day, as shown in several diagrams. 

As an important application of the theory, Chapter 5 covers long-wavelength temporal variations of the gravity field and their detection by satellite laser ranging. Besides glacial-isostatic adjustment, the mass imbalances of today's major ice sheets in Antarctica and Greenland also contribute to gravity changes. In a number of illustrations, the authors interpret the satellite data and discuss the various trade-offs governing the inference of lithosphere thickness and mantle viscosity from these data. 

Chapter 6 is devoted to various aspects of the important topic of sea-level variations. As a powerful tool for modelling such variations, the sea-level equation coupling changes in surface loading, geoid height and surface height is developed. Whereas, globally, sea-level changes caused by glacial-isostatic adjustment are the dominant process interfering with sea-level rise produced by climate warming, tectonically induced changes may become significant in particular regions. This is shown using the example of the Mediterranean Sea. The final sections of the chapter cover sea-level variations induced by polar wander and subduction and their dependence on the viscous stratification of the Earth. 

As a further application of the theory developed, Chapter 7 deals with the contribution of mountain building to polar wander and the degree-two variation of the geopotential.  The relationships are exemplified using the uplift history of the Himalayan–Tibetan Plateau. Numerical predictions for a number of viscosity and density stratifications are shown in several diagrams. As a related tectonic process, the effect of subduction on polar wander is also studied and illustrated for a random distribution of sinking slabs. In the final section of the chapter, polar wander on the Moon, Venus and Mars is considered. 

The concluding Chapter 8 investigates the topic of post-seismic deformation on the basis of viscoelastic normal-mode theory. First, forward calculations of modal relaxation times and surface displacements for particular seismic sources and viscosity stratifications are presented. After this, two selected earthquakes in Italy are studied more closely and, using GPS and levelling data, the fault mechanisms are inferred. 

In two short Appendices, explicit forms of several more complicated equations required in the theoretical development of Chapter 1 are compiled. 

Taken together, the breadth of the topics studied in the framework of viscoelastic normal-mode theory over about 300 pages is impressive and summarizes the research completed by the authors over the last 20 years. In consequence of the fact that the material presented is essentially taken from the numerous papers published by the authors during this period, the treatment naturally shows a degree of non-uniformity. The bibliography extends over 16 pages, covers the authors' work rather completely and gives a balanced selection of the contributions to the topic by other investigators. Rather disturbing – but most likely the responsibility of the publisher – is that sections and subsections are numbered without the appropriate chapter number. Also, some introduction or overview at the beginning of each chapter would have improved the orientation for the reader. Notwithstanding these more formal objections, the authors have completed a thorough and rather comprehensive review of viscoelastic normal-mode theory and its applications. For this reason, their book can be recommended to graduate students and researchers wishing to gain access to this topic in a convenient way.

Detlef Wolf

 

 

 

The fast bibliography consists of a listing of papers relevant to Geodesy, that has been collected by the IAG Bibliographic Service (IBS) since previous issue of the fast bibliography (IAG Newsletter December 2004 and Journal of Geodesy 78/7-8). The IBS is based on the literary data bank GEOPHOKA, which is maintained by BKG (Budensamt für Kartographie und Geodäsie) at the Branch Office Leipzig, Leipzig Zentrale technisch – wissenschaftliche Angelegenheiten, Bibliothek, Karl-Rothe Strasse 10-14, 0415 Leipzig, Germany. The IBS can be reached at the following Internet address: http://www.leipzig.ifag.de. The bibliographic services are furthermore reachable through the homepage of IAG: http://www.iag-aig.org.

 

Abd-Elmotad, Hussein: Response of the Earth's crust due to topographic loads derived by inverse isostasy, Geotech. invest. survey., Berlin : Springer, 2004. - pp. 325-332, 2004

Akyilmaz, O. Kutterer, H.: Prediction of Earth rotation parameters by fuzzy inference systems, J. geod., Berlin Vol. 78, Nr. 1-2 = September 2004. - pp. 82-93, 2004

Albertella, A. Migliaccio, M. Reguzzoni, Mirko Sanso, Fernando: Wiener filters and collocation in satellite gradiometry, Cah. Centre Europ. Geodyn. Seism., Berlin : Springer, 2004. - pp. 32-37, 2004

Alberts, B. Klees, R.: A comparison of methods for the inversion of airborne gravity data, J. geod., Berlin Vol. 78, Nr. 1-2 = September 2004. - pp. 55-65, 2004

Altamini, Zuheir Sillard, Patrick: ITRF2000: From theory to implementation, Suomen Geod. Laitoksen Julkaisuja, Berlin : Springer, 2004. - pp. 157-163, 2004

Ambrozic, Tomaz: Deformacijska analiza po postopku Karlsruhe, Geod. vestnik, Ljubljana 48(2004)3. - pp. 315-331, 2004

Ardalan, A.A. Grafarend, E.W.: Die neuen L2C-Signale von GPS und die R-Track-Technologie von Trimble, Geomatik Schweiz, Scherz 102(2004)9. - pp. 594-596, 2004

Ardalan, A.A. Grafarend, E.W.: High-resolution regional geoid computation without applying Stokes's formula: a case study of the Iranian geoid, J. geod., Berlin Vol. 78, Nr. 1-2 = September 2004. - pp. 138-156, 2004

Ardalan, A.A. Safari, A.: Ellipsoidal terrain correction based on multi-cylindrical equal-area map projection of the reference ellipsoid, J. geod., Berlin Vol. 78, Nr. 1-2 = September 2004. - pp. 114-123, 2004

Barzaghi, Riccardo Borghi, Alessandra Crespi, M. Pietrantonio, Garzia Riguzzi, Federica: GPS permanent network solution: the impact of temporal correlations, Suomen Geod. Laitoksen Julkaisuja, Berlin : Springer, 2004. - pp. 179-183, 2004

Bathelt, Harald Jentsch, Caroline: Wandel der Projektorganisation am Beispiel der Frankfurter und Leipziger Werbeindustrie, Petermanns geogr. Mitt., Gotha 148(2004)4. - pp. 44-51, 2004

Beavan, John Matheson, D. Denys, P. Denham, M. Herring, T. Hager, B. Molnar, P.: A vertical deformation profile across the Southern Alps, New Zealand, from 3.5 years of continuous GPS data, Cah. Centre Europ. Geodyn. Seism., Luxembourg, 2004, Vol. 23. - pp. 111-123, 2004

Beinat, Alberto Crosilla, F.: Procrustes statistics to test for significant OLS similarity transformation parameters, Petermanns geogr. Mitt., Berlin : Springer, 2004. - pp. 113-119, 2004

Bergfeld, Annedore Gross, Ina-Beate Knappe, Elke: Klein- und Mittelstaedte: Der Staedteverbund 'Kleines Dreieck - Bogatynia, Hradek nad Nisou, Zittau' - eine Schnittstelle der EU-Erweiterung, Petermanns geogr. Mitt., Gotha 148(2004)4. - pp. 38-43, 2004

Berne, J.L. Baselga, S.: First-order design of geodetic networks using the simulated annealing method, J. geod., Berlin Vol. 78, Nr. 1-2 = September 2004. - pp. 47-54, 2004

Bilich, Andria Larson, Kristine M. Axelrad, Penina: Observations of signal-to-noise ratios (SNR) at geodetic GPS site CASA : implications for phase multipath, Cah. Centre Europ. Geodyn. Seism., Luxembourg, 2004, Vol. 23. - pp. 77-83, 2004

Blewitt, Geoffrey: Fundamental ambiguity in the definition of vertical motion, Cah. Centre Europ. Geodyn. Seism., Luxembourg, 2004, Vol. 23. - pp. 1-4, 2004

Bogusz, Janusz Lemanska, Katarzyna: Earth tides research programme conducted in the Jozefoslaw Observatory, Rep. geod., Warszawa, 2004, Nr. 2(69). - pp. 253-259, 2004

Borza, Tibor Fejes, Istvan: Periodic improvement of the reference frame CEGRN, Rep. geod., Warszawa, 2004, Nr. 2(69). - pp. 19-24, 2004

Borza, Tibor: A mueholdas helymeghatarozas kiegeszito rendszereinek nemzetkoezi es hazai fejlesztesei, Geod. kartogr., Budapest56(2004)8. - pp. 37-41, 2004

Bouman, J. Koop, R. Tscherning, C.C. Visser, P.: Calibration of GOCE SGG data using high-low SST, terrestrial gravity data and global gravity field models, J. geod., Berlin Vol. 78, Nr. 1-2 = September 2004. - pp. 124-137, 2004

Braun, Boris: Umweltmanagement in der Wirtschaft - Rahmenbedingungen, Diffusionsprozesse und Erfolgsfaktoren auf globaler und regionaler Ebene, Petermanns geogr. Mitt., Gotha 148(2004)4. - pp. 56-65, 2004

Cacon, Stefan Bosy, Jarislaw Kontny, Bernard: Recent tectonic activity in the Eastern Sudetes and on the fore-Sudetic Block on the basis of 1993-2003 investigations, Rep. geod., Warszawa, 2004, Nr. 2(69). - pp. 197-211, 2004

Cai. Jianqing Grafared, Erik W. Schaffrin, Burkhard: The A-optimal regularization parameter in uniform Tykhonov-Phillips regularization - alpha-weighted BLE, XYZ : Rev. Assoc. Franc. Topogr., Berlin : Springer, 2004. - pp. 309-324, 2004

Campbell, James: Accuracy of vertical positioning by GPS, Cah. Centre Europ. Geodyn. Seism., Luxembourg, 2004, Vol. 23. - pp. 17-25, 2004

Caporali, A. Facchinetti, C. Gallini, G.: Annual Report presented by partner UNIPD for the period 1 April 2003 - 31 March 2004, Rep. geod., Warszawa, 2004, Nr. 2(69). - pp. 39-49, 2004

Chen, Xiaoming Landau, Herbert Vollath, Ulrich: Neue Werkzeuge fuer Inegrity Monitoring in Referenzstationsnetzen, Allg. Vermess.nachr., Heidelberg 111(2004)10. - pp. 341-345, 2004

Condi, Francis Wunsch, C.: Gravity field variability, the geoid, and ocean dynamics, XYZ : Rev. Assoc. Franc. Topogr., Berlin : Springer, 2004. - pp. 285-292, 2004

Crippa, Bruno Crosetto, M. Blazguez, M. Barzaghi, Riccardo: SAR interferometry for determination control, Geotech. invest. survey., Berlin : Springer, 2004. - pp. 333-338, 2004

Cristea, E. Haslinger, C. Stangl, G.: Hafelekar GPS permanent station seasonal monitoring, Rep. geod., Warszawa, 2004, Nr. 2(69). - pp. 167-171, 2004

Czarnecki, K. Mojzes, M.: Geodynamics of the Tatra Mountain, Rep. geod., Warszawa, 2004, Nr. 2(69). - pp. 89-93, 2004

D'Hollander, Raymond: La theorie de la loxodromie de Pedro Nunes (Petrus Nonius), XYZ : Rev. Assoc. Franc. Topogr., Paris 26(2004)2. - Nr. 99. - pp. 47-56, 2004

Dam, T. van (Hrsg.) Francis, O. (Hrsg.): Proceedings of the workshop 'The State of GPS Vertical Positioning precision : Separation of Earth Processes by Space Geodesy'. April 2-4, 2003, Grand-Duchy of Luxembourg, Cah. Centre Europ. Geodyn. Seism., Luxembourg, 2004, Vol. 23. - 176 pp. : Abb., Tab., Lit., 2004

Dannenberg, Peter Kinder, Sebastian: Branchencluster in der amtlichen Statistik Nordrhein-Westfalen, Petermanns geogr. Mitt., Gotha 148(2004)4. - pp. 52-55, 2004

Deisting, Baerbel: Das europaeische Satellitennavigationssystem Galileo in der Entwicklungsphase, Mitt. DVW Bayern : Ges. Geod., Geoinf. Landmanagem., Muenchen 56(2004)3. - pp. 321-337, 2004

Deleflie, Florent Barlier, Francois Exertier, Pierre: Le systeme GALILEO, une technique d'avenir pour la geodesie spatiale de tres haute exactitude, XYZ : Rev. Assoc. Franc. Topogr., Paris 26(2004)3. - Nr. 100. - pp. 49-58, 2004

Demhardt, Imre Josef: Inseln: Pazifische Inselwelten, Petermanns geogr. Mitt., Gotha 148(2004)4. - pp. 76-77, 2004

Dermanis, Athanasios: The rank deficiency in estimation theory and the definition of reference systems, Cah. Centre Europ. Geodyn. Seism., Berlin : Springer, 2004. - pp. 145-156, 2004

Ditmar, P. van Eck van der Sluijs, A.A.: A technique for modling the Earth's gravity field on the basis of satellite accelerations, J. geod., Berlin Vol. 78, Nr. 1-2 = September 2004. - pp. 12-33, 2004

Ditmar, Pavel Klees, Roland Kostenko, F.: Fast spherical harmonic synthesis and co-synthesis with applications in gravity field modeling, Cah. Centre Europ. Geodyn. Seism., Berlin : Springer, 2004. - pp. 99-106, 2004

Dong, Danan: Seasonal vertical variations from GPS-derived site position time series, Cah. Centre Europ. Geodyn. Seism., Luxembourg, 2004, Vol. 23. - pp. 47-53, 2004

Drozdov, N.D.: Ob al'ternativnom podkhode k teorii vneshnego gravitacionnogo polja i figury Zemli, Geod. kartogr., Moskva 80(2004)4. - pp. 11-15, 2004

Duquesnoy, Thierry: La red francesa permanente de GPS, Topogr. cartogr., Madrid Vol. 21, 2004, Nr. 122. - pp. 8, 10-12, 2004

Estermann, Gisela Schuh, H. Cretaux, J.F. Dam, T. van: Various models of atmospheric and hydrological loading investigated by VLBI, Cah. Centre Europ. Geodyn. Seism., Luxembourg, 2004, Vol. 23. - pp. 69-75, 2004

Fejes, I. Pesec, P.: CERGOP-2/Environment, summary of the first years, Rep. geod., Warszawa, 2004, Nr. 2(69). - pp. 105-114, 2004

Fengler, Martin J. Freeden, Willi Gutting, Martin: Darstellung des Gravitationsfeldes und seiner Funktionale mit sphaerischen Multiskalentechniken, Z. Geod., Geoinf. Landmanag., Augsburg 129(2004)5. - pp. 323-334, 2004

Fernandez-Plazaola, U. Martin-Guerrero, T.M. Entrambasaguas-Munoz, J.T. Martin-Neira, M.: The Null method applied to GNSS three-carrier phase ambiguity resolution, J. geod., Berlin Vol. 78, Nr. 1-2 = September 2004. - pp. 96-102, 2004

Finn, Gunter Grafarend, Erik W.: Ellipsoidal vertical deflections: regional, continental, global maps of the horizontal derivative of the incremental gravity potential, Mitt. DVW Bayern : Ges. Geod., Geoinf. Landmanagem., Berlin : Springer, 2004. - pp. 252-259, 2004

Freeden, Willi Mayer, Carsten: Multiresolution data analysis - Numerical realization by use of domain decomposition methods and fast multipole techniques, Cah. Centre Europ. Geodyn. Seism., Berlin : Springer, 2004. - pp. 57-68, 2004

Freeden, Willi Mayer, Carsten: Multiscale solution of oblique boundary-value problems by layer potentials, Cah. Centre Europ. Geodyn. Seism., Berlin : Springer, 2004. - pp. 90-98, 2004

Galambos, Csilla: Foeldtani terkepek felueleti jelei, Geod. kartogr., Budapest 56(2004)7. - pp. 16-21, 2004

Gillieron, Pierre-Yves Ladetto, Quentin: Navigation pedestre dans un environment construit, XYZ : Rev. Assoc. Franc. Topogr., Paris 26(2004)3. - Nr. 100. - pp. 43-48, 2004

Mitt., Gotha 148(2004)4. - pp. 28-37, 2004

Gontran, Herve Skaloud, Jan: Techniques GPS-RTK appliquees a la trajectographie, XYZ : Rev. Assoc. Franc. Topogr., Paris 26(2004)2. - Nr. 99. - pp. 27-32, 2004

Grebenitcharsky, Rossen Sideris, Michael G.: Application of spherical pseudo-differential operators and spherical wavelets for numerical solutions of the fixed altimetry-gravimetry boundary value problem, Geod. vestnik, Berlin : Springer, 2004. - pp. 242-251, 2004

Grenerczy, Gyula: The motion of Adria and its effects on the Pannonian basin, Rep. geod., Warszawa, 2004, Nr. 2(69). - pp. 73-80, 2004

Gross, Richard S.: Angular momentum in the Earth system, XYZ : Rev. Assoc. Franc. Topogr., Berlin : Springer, 2004. - pp. 274-284, 2004

Grundlich, Brigitte Teunissen, Peter J.G.: Multiple models - fixed, switching, interacting, Petermanns geogr. Mitt., Berlin : Springer, 2004. - pp. 129-136, 2004

Gu, Liya: Accuracy improvement for tunnel control network by construction ellipsoid positioning, Geotech. invest. survey., Peking (2004)4 = Nr. 189. - pp. 55-57, 2004

Hammound, William C.: Vertical motion of the Basin and Range, Western United States, from 10 years of campaign GPS, Cah. Centre Europ. Geodyn. Seism., Luxembourg, 2004, Vol. 23. - pp. 131-136, 2004

Heck, Bernhard: Problems in the definition of vertical reference frames, Suomen Geod. Laitoksen Julkaisuja, Berlin : Springer, 2004. - pp. 164-173, 2004

Hefty, Jan Gerhatova, Lubomira Igondova, Miroslava Kovac, Marian Hrcka, Michal: The network of permanent GPS stations in Central Europe as the reference for CERGOP related activities, Rep. geod., Warszawa, 2004, Nr. 2(69). - pp. 115-123, 2004

Hefty, Jan: Geokinematical modelling and strain analysis, Rep. geod., Warszawa, 2004, Nr. 2(69). - pp. 51-54, 2004

Hefty, Jan: GPS data analysis and the definition of reference frames, Rep. geod., Warszawa, 2004, Nr. 2(69). - pp. 33-37, 2004

Hill, Emma Blewitt, Geoffrey: Analysis of vertical velocities from BARGEN continuous GPS data at Yucca Mountain, Southern Nevada, Cah. Centre Europ. Geodyn. Seism., Luxembourg, 2004, Vol. 23. - pp. 125-129, 2004

Hirt, Christian: Entwicklung und Erprobung eines digitalen Zenitkamerasystems fuer die hochpraezise Lotabweichungsbestimmung, Wiss. Arb. Fachricht. Vermess.wes. Univ. Hannover, Hannover, 2004, Nr. 253. - 186 pp. : Abb., Tab., Lit., 2004

Holota, Petr: Some topics related to the solution of boundary-value problems in geodesy, Geod. vestnik, Berlin : Springer, 2004. - pp. 189-200, 2004

Hoshizaki, T. Andrisani, D.II. Braun, A.W. Mulyana, A.K. Bethel, J.S.: Performance of integrated electro-optical navigation systems, Navigation : j. Inst. Navig., Alexandria, Virginia51(Sommer 2004)2. - pp. 101-121, 2004

Ji, Shanbiao: Rebuilding of the first-order control network for Shanghai City, Geotech. invest. survey., Peking (2004)5 = Nr. 190. - pp. 50-52, 2004

Johnson, Daniel J.: The vertical component in raw GPS observations, Cah. Centre Europ. Geodyn. Seism., Luxembourg, 2004, Vol. 23. - pp. 155-160, 2004

Kasser, Michel Bonnetain, Paul: Estado del mantenimiento mediante GPS de la Red Nacional Francesa de Nivelacion (NGF), Topogr. cartogr., Madrid Vol. 21, 2004, Nr. 122. - pp. 18-19, 22-24, 2004

Kasser, Michel: La geodesie francaise et mondiale : une evolution considerable en 25 ans, XYZ : Rev. Assoc. Franc. Topogr., Paris 26(2004)3. - Nr. 100. - pp. 71-76, 2004

Kaur, Ravinder Srivastava, Rajesh Betne, Rajeev Mishra, Kamal Dutta, D.: Integration of linear programming and a watershed-scale hydrologic model for proposing an optimized land-use plan and assessing its impact on soil conservation - A case study of the Nagwan watershed in the Hazaribagh district of Jharkhand, India, Int. j. geogr. inf. sci., London 18(2004)1. - pp. 73-98, 2004

Keller, Wolfgang: The use of wavelet fo the acceleration of iteration schemes, Cah. Centre Europ. Geodyn. Seism., Berlin : Springer, 2004. - pp. 81-87, 2004

Kern, Michael: A comparison of data weighting methods for the combination of satellite and local gravity data, Petermanns geogr. Mitt., Berlin : Springer, 2004. - pp. 137-144, 2004

Kierulf, Halfdan Pascal Plag, H.-P. Kristiansen, O.: Elevation dependent effect of scale error on apparent station height, Cah. Centre Europ. Geodyn. Seism., Luxembourg, 2004, Vol. 23. - pp. 161-164, 2004

Kirchner, Michael Becker, Matthias Haefele, Petra: Calibration and validation of new GPS observation equipment for the CERGOP-2/Environment Project, Rep. geod., Warszawa, 2004, Nr. 2(69). - pp. 271-284, 2004

Kirchner, Michael Becker, Matthias: Design of new permanent observation factilities for the CERGOP-2/Environment Project, Rep. geod., Warszawa, 2004, Nr. 2(69). - pp. 25-31, 2004

Klagge, Britta: Finanzstandort Deutschland im Wandel? Rolle und Entwicklung des Risikokapitalmarktes, Petermanns geogr. Mitt., Gotha148(2004)4. - pp. 18-25, 2004

Klees, Roland Ditmar, Pavel Kusche, Juergen: Numerical techniques for large least-squares problems with applications to GOCE, Navigation : j. Inst. Navig., Berlin : Springer, 2004. - pp. 12-21, 2004

Klees, Roland Ditmar, Pavel: How the handle colored noise in large least-squares problems in the presence of data gaps?, Cah. Centre Europ. Geodyn. Seism., Berlin : Springer, 2004. - pp. 39-48, 2004

Kloosterman, Robert Stegmeijer, Eva: Cultural industries in the Netherlands - path-dependent patterns and institutional context : the case of architecture in Rotterdam, Petermanns geogr. Mitt., Gotha148(2004)4. - pp. 68-75, 2004

Kogoj, D. Poljak, M. Vodopivec, F.: Determination of local recent movements in Slovenia, Rep. geod., Warszawa, 2004, Nr. 2(69). - pp. 133-139, 2004

Korbunov, A.I.: Principy integrirovannojj interpretacii gravimetricheskikh dannykh, Geofiz. zh., Kiev 25(2003)6. - pp. 95-105, 2003

Kostelecky, Jakub Kostelecky, Jan: Test of the GPS dual-frequency receiver Serpentrio POLARX2 at the Geodetic Observatory Pecny, Rep. geod., Warszawa, 2004, Nr. 2(69). - pp. 173-177, 2004

Krantz, Eric Riley, Stuart Large, Peter: Neuheiten in der GPS-Antennentechnologie: die neuen Trimble Zephyr-Antennen, Allg. Vermess.nachr., Heidelberg 111(2004)10. - pp. 351-356, 2004

Kreutzmann, Hermann: Pakistan - kriesengeschuetteltes Staatswesen im regionalen Konfliktfeld Suedasiens, Petermanns geogr. Mitt., Gotha 148(2004)4. - pp. 90-92, 2004

Kruczyk, M. Liwosz, T. Rogowski, J.B.: Some aspects of GPS tropospheric delay behaviour, usefulness and estimation, Rep. geod., Warszawa, 2004, Nr. 2(69). - pp. 235-242, 2004

Kulke, Elmar: Ansaetze wirtschaftsgeographischer Betrachtung von Dienstleistungen, Petermanns geogr. Mitt., Gotha148(2004)4. - pp. 6-15, 2004

Kusche, Juergen: Estimating covariance parameters in gravity downward continuation, Mitt. DVW Bayern : Ges. Geod., Geoinf. Landmanagem., Berlin : Springer, 2004. - pp. 293-300, 2004

Kutterer, Hansjoerg: Statistical hypothesis tests in case of imprecise data, Cah. Centre Europ. Geodyn. Seism., Berlin : Springer, 2004. - pp. 49-56, 2004

Lambert, Mathieu Santerre, Rock: Integration de releves topographiques et de mesures GPS en mode cinematique pour l'analyse des performances de cyclistes sur piste, XYZ : Rev. Assoc. Franc. Topogr., Paris 26(2004)3. - Nr. 100. - pp. 39-42, 2004

Lambrou, Evengelia Pantazis, George: A standard network to control GPS receivers, Rep. geod., Warszawa, 2004, Nr. 2(69). - pp. 261-269, 2004

Lippus, J.: Transformation of coordinates using piecewise conformal mapping, J. geod., Berlin Vol. 78, Nr. 1-2 = September 2004. - pp. 40-46, 2004

Lu, Tieding: Test and analysis of blunder on height abnormality in GPS height conversion, Geotech. invest. survey., Peking (2004)4 = Nr. 189. - pp. 51-54, 2004

Marguerit, Christophe: Synthese sur la concordance des references altimetriques en Baie du Mont-Saint-Michel, XYZ : Rev. Assoc. Franc. Topogr., Paris 26(2004)1. - Nr. 98. - pp. 53-56, 2004

Marjetic, Ales Turk, Goran: Dolocitev geometrijskega sredisca obcine Skocjan, Geod. vestnik, Ljubljana 48(2004)3. - pp. 332-339, 2004

Markuze, Ju.I. Antipov, A.V.: Vozmozhnosti uluchenija algorima ob'edinenija sputnikovykh i nazemnykh setejj, Geod. kartogr., Moskva 80(2004)4. - pp. 16-21, 2004

Marti, Lukas Graas, Frank van Kelly, Joseph: Effects of aircraft overflights on GPS measurements, Navigation : j. Inst. Navig., Alexandria, Virginia 51(Sommer 2004)2. - pp. 123-131, 2004

Medak, Damir Pribicevic, Bosko: Research on the international geodynamic test area Plitvice Lakes, Rep. geod., Warszawa, 2004, Nr. 2(69). - pp. 81-87, 2004

Merbah, Ali Yelles-Chouch, A. Sevilla, M.J. Garcia, L. Meghraoui, M.: Deformations associated with El Chelif earthquake on 10.10.1980: Vertical movements determinations, Cah. Centre Europ. Geodyn. Seism., Luxembourg, 2004, Vol. 23. - pp. 165-168, 2004

Milev, Georgi Vassileva, Keranka: Geodynamics of the Balkan Peninsula, Rep. geod., Warszawa, 2004, Nr. 2(69). - pp. 97-104, 2004

Million, Claude Chambaretau, Jacques: Transformation polynomiale par fonctions radiales de base : les consequences des changements de referentiels. Application au cas des raccordements parcellaires, XYZ : Rev. Assoc. Franc. Topogr., Paris 26(2004)2. - Nr. 99. - pp. 57-61, 2004

Mojzes, M. Husar, L. Janak, J. Papco, J. Czarnecki, K. Barlik, M. Bogusz, J. Walo, J.: Testing of gravimetric quasigeoid by astronomical measurements, Rep. geod., Warszawa, 2004, Nr. 2(69). - pp. 157-166, 2004

Mojzes, M. Papco, J. Czarnecki, K. Walo, J.: Evaluation of six years GPS epoch campaign measurements in the Tatra Mountains, Rep. geod., Warszawa, 2004, Nr. 2(69). - pp. 189-196, 2004

Morken, D. Nerem, Robert Haines, B.: Using antenna phase calibration maps for improving the GPS vertical, Cah. Centre Europ. Geodyn. Seism., Luxembourg, 2004, Vol. 23. - pp. 85-90, 2004

Mueller, Johannes: China: Der Gelbe Fluss - Lebensader und Bedrohung, Petermanns geogr. Mitt., Gotha 148(2004)4. - pp. 86-87, 2004

Neitzel, Frank: Nullvarianz-Rechenbasis und Eigenschaften der Koordinaten bei freier Netzausgleichung, Z. Geod., Geoinf. Landmanag., Augsburg129(2004)5. - pp. 335-342, 2004

Nicolas, Joelle: Satellite laser ranging positioning time series, Cah. Centre Europ. Geodyn. Seism., Luxembourg, 2004, Vol. 23. - pp. 169-174, 2004

Niell, Arthur Petrov, Leonid: Using a numerical weather model to improve geodesy, Cah. Centre Europ. Geodyn. Seism., Luxembourg, 2004, Vol. 23. - pp. 55-62, 2004

Otero, J. Auz, A.: A formal comparison between Marych-Moritz's series, Sanso's change of boundary method and a variational approach for solving some linear geodetic boundary value problems, Geod. vestnik, Berlin : Springer, 2004. - pp. 226-233, 2004

Pajer, Timea Joo, Istvan Balazsik, Valeria: A jelenkori fueggoeleges felszinmozgasok es harom foeldtani jellemzoe kapcsolatanak vizsgalata a Koezepsoe-Tisza koernyeken es a Koeroes-videken, Geod. kartogr., Budapest56(2004)7. - pp. 3-15, 2004

Pany, Thomas Eissfeller, Bernd: Code and phase tracking of generic PRN signals with sub-Nyquist sample rates, Navigation : j. Inst. Navig., Alexandria, Virginia 51(Sommer 2004)2. - pp. 143-159, 2004

Peneva, E.: A preliminary gravimetric geoid model for the territory of Bulgaria, Allg. Vermess.nachr., Heidelberg111(2004)10. - pp. 322-324, 2004

Petrov, Leonid Boy, Jean-Paul: Atmospheric pressure loading for routine data analysis, Cah. Centre Europ. Geodyn. Seism., Luxembourg, 2004, Vol. 23. - pp. 63-58, 2004

Petrovskaya, Margarita Vershkov, A.N.: Potential coefficient recovery from the spectra of the full space-borne gravity gradient tensor, Geotech. invest. survey., Berlin : Springer, 2004. - pp. 234-241, 2004

Poutanen, Markku Ollikainen, Matti Koivula, Hannu Bilker, Mirjam Jokela, Jorma Virtanen, Heikki: Global perodic effects in GPS time series, Cah. Centre Europ. Geodyn. Seism., Luxembourg, 2004, Vol. 23. - pp. 137-142, 2004

Pribicevic, Bosko Medak, Damir Prelogovic, Eduard: Geodetic and geologic research of recent tectonic activity in Dinarides, Rep. geod., Warszawa, 2004, Nr. 2(69). - pp. 126-131, 2004

Progri, Ilir F. Michalson, William R. Cyganski, David: An OFDM/FDMA indoor geolocation system, Navigation : j. Inst. Navig., Alexandria, Virginia 51(Sommer 2004)2. - pp. 133-142, 2004

Radovanovic, R.S. El-Sheimy, N. Teskey, W.F.: Variance-covariance modeling of atmospheric errors for satellite-based network positioning, Navigation : j. Inst. Navig., Alexandria, Virginia51(Sommer 2004)2. - pp. 161-170, 2004

Ray, Jim R.: Reinforming and securing the IGS reference tracking network, Cah. Centre Europ. Geodyn. Seism., Luxembourg, 2004, Vol. 23. - pp. 5-15, 2004

Reguzzoni, Mirko Venuti, Giovanna: Testing invariance for random field modeling, Geod. vestnik, Berlin : Springer, 2004. - pp. 218-225, 2004

Rezek, Jurij Radovan, Dalibor Stopar, Bojan: Strategiga osnovnega geodetskega sistema, Geod. vestnik, Ljubljana 48(2004)3. - pp. 288-314, 2004

Rogoswki, J.B. Kujawa, L. Leszczynski, M. Rogowki, A.: Some experiences in RTK and DGPS measurements using Internet and GSM mobile phone, Rep. geod., Warszawa, 2004, Nr. 2(69). - pp. 243-252, 2004

Rogowski, J.B. Bogusz, J. Figurski, M. Klek, M. Kruczyk, M. Kujawa, L. Kurka, W. Liwosz, T.: Research programme of the Astrogeodetic Observatory in Jozefoslaw, Rep. geod., Warszawa, 2004, Nr. 2(69). - pp. 213-233, 2004

Roscher, Horst: Berechnung von Hallen-Rundbahnen mit Klothoiden : Eine neue Formel vereinfacht die Berechnung, Vermessungsingenieur, Wiesbaden 55(2004)5. - pp. 368-373, 2004

Ruedja, Andres: Geodetic datums, reference systems and geodetic networks in Estonia, Suomen Geod. Laitoksen Julkaisuja, Kirkkonummi, 2004, Nr. 132. - 311 pp. : Abb., Tab., Lit., 2004

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Saleh, J. Edwards, K. Barbaste, J. Balkaransingh, S. Grant, D. Weber, J.C. Leong, T.: One some improvements in the geodetic framework of Trinidad and Tabago, Survey. rev., London, Vol. 37, 2004, No. 294. - pp. 604-625, 2004

Sanjose Blasco, Jose Juan de: Estimacion de la Dinamica de los Glaciares Rocosos mediante Modelizacion Ambiental y Tecnicas Fotogrametricas Automaticas (y III), Topogr. cartogr., Madrid Vol. 21, 2004, Nr. 122. - pp. 26-28, 30-33, 2004

Sanso, Fernando (Hrsg.): Fifth Hotine-Marussi symposium on mathematical geodesy : Matera, Italy, June 17-21, 2003, Navigation : j. Inst. Navig., Berlin : Springer, 2004. - 346 pp. : Abb., Lit., 2004

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Schmullius, Christiane Hese, Soeren Lucht, Wolfgang: CARBON-3D - an international Earth observation mission for global biomass mapping for an improved understanding of the CO,2, balance, Photogramm. Fernerkund. Geoinf., Stuttgart 8(2004)5. - pp. 413-422, 2004

Schueler, Torben: Ein Beitrag zur Kalibrierung des ENVISAT-Radaralitmeters mit Hilfe von GPS-Hochseebojen, Z. Geod., Geoinf. Landmanag., Augsburg 129(2004)5. - pp. 317-322, 2004

Schuh, Wolf-Dieter Kargoll, R.: The numerical treatment of the downward continuation problem for the gravity potential, Cah. Centre Europ. Geodyn. Seism., Berlin : Springer, 2004. - pp. 22-31, 2004

Schwahn, W. Soehne, W.: Coherences in vertical GPS time series in Western and Central Europe : ocean loading and annual wave, Cah. Centre Europ. Geodyn. Seism., Luxembourg, 2004, Vol. 23. - pp. 143-148, 2004

Schwegmann, Wolfgang: Ein eingebettetes Expertensystem zur Automatisierung der VLBI-Auswertung, Mitt. Bundesamtes Kartogr. Geod., Frankfurt am Main, 2004, Bd. 30. - 176 pp. : Abb., Tab., Lit., 2004

Sella, Gionanni F. Stein, Seth Wdowinski, Shimon Dixon, Timothy H. Dokka, Roy: GPS observations of glacial isostatic adjustment in North America, Cah. Centre Europ. Geodyn. Seism., Luxembourg, 2004, Vol. 23. - pp. 105-110, 2004

Sidorenkov, Nikolai: Changes in the antartic ice sheet mass and the instability of the earth's rotation over the last 110 years, Geotech. invest. survey., Berlin : Springer, 2004. - pp. 339-346, 2004

Sjoeberg, L.E. Featherstone, W.E.: Two-step procedures for hybrid geoid modelling, J. geod., Berlin Vol. 78, Nr. 1-2 = September 2004. - pp. 66-75, 2004

Sjoeberg, L.E.: The effect on the geoid of lateral topographic density variations, J. geod., Berlin Vol. 78, Nr. 1-2 = September 2004. - pp. 34-39, 2004

Sledzinski, Janusz (Hrsg.): Proceedings of the EGU Symposium G11 'Geodetic and Geodynamic Programmes of the CEI (Central European Initiative)', Nice, France, 25-30 April 2004, Rep. geod., Warszawa, 2004, Nr. 2(69). - 377 pp. : Abb., Tab., Lit., 2004

Sledzinski, Janusz Vyskocil, P.: Current geotectonic investigations in Central Europe, Rep. geod., Warszawa, 2004, Nr. 2(69). - pp. 65-72, 2004

Sledzinski, Janusz: New European initiative : EUPOS - European Position Determination System, Rep. geod., Warszawa, 2004, Nr. 2(69). - pp. 141-148, 2004

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Sun, W.: Short Note: Asymptotic theory for calculating deformations caused by dislocations buried in a spherical earth - gravity change, J. geod., Berlin Vol. 78, Nr. 1-2 = September 2004. - pp. 76-81, 2004

Tanaka, Torao Hoso, Yoshionu Harada, Masataka Hayashi, Taiichi Mousa, Ashraf El-ktub Hirahara, Kazuro: Gradients of water vapor distribution in the troposphere observed with water vapor radiometers in Uji, Southwest Japan, J. Geod. Soc. Japan, Tsukuba 50(2004)2. - pp. 67-79, 2004

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Verhagen, Sandra Teunissen, Peter J.G.: PDF evaluation of the integer ambiguity residuals, Petermanns geogr. Mitt., Berlin : Springer, 2004. - pp. 120-128, 2004

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Vyskocil, P. Sledzinski, Janusz: The geodynamics of the area between Alps, Bohemian Massif and a Western part of Polish platform, Rep. geod., Warszawa, 2004, Nr. 2(69). - pp. 179-188, 2004

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Willis, M.J. Wilson, T.J. James, T.S.: A comparison of measured and modeled bebrock motions for Southern Victoria Land, Antarctica, Cah. Centre Europ. Geodyn. Seism., Luxembourg, 2004, Vol. 23. - pp. 101-104, 2004

Woeppelmann, Guy McLellan, S. Bouin, Marie-Novelle Altamini, Z. Daniel, L.: Current GPS data analysis at CLDG for the IGS TIGA pilot project, Cah. Centre Europ. Geodyn. Seism., Luxembourg, 2004, Vol. 23. - pp. 149-154, 2004

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Ziebart, Marek Adhya, S. Sibthorpe, A. Cross, P.: Residual systematic biases in spacecraft orbits, Cah. Centre Europ. Geodyn. Seism., Luxembourg, 2004, Vol. 23. - pp. 91-99, 2004

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