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G. Gps, U. Défi-pour-galileo, P. Willis, X. Revue, G. Iers-doris-pilot-experiment et al., club-internet.fr/aftopo/publications/xyz/revue.html Report of the Activities Related to the Joint CSTG, CGSIC (Civil GPS System Interface Commitee), ION (Institute of Navigation), IGS (International GPS Service), pp.42-45, 2000.

G. Traitement-d-'une-campagne, E. Comportant-plusieurs-types-de-récepteurs-gps-bifréquences-campagne-préliminaire, K. M. Bra, P. Willis, and C. Boucher, Actes non publiés) IGN CC/G n°! 554 Positioning with the DORIS system: Present status and first results, 4ème Symposium International sur la Géodésie en Afrique, 1990.

G. Le-système and P. Pour-le-positionnement-statique, Willis, 4ème Journée nationale de la recherche géographique, Conseil National de l'Information Géographique, pp.23-28, 1991.

W. I. Bertiger, S. C. Wu, T. Yunck, R. Muellerschoen, P. Willis et al., American Institute of Astronautics and Aerodynamics, Early results from the Topex/Poseïdon GPS Precise Orbit Determination Demonstration Proc. American Astronautical Society IGN CC, 1993.

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N. La-géodésie-en-afrique, C. Rebaï, G. Boucher, P. Petit, F. Willis et al., Combining different types of GPS receivers for precise positioning, Choice of VLBI and GPS observations sites for studying geodynamics in western mediterranean area, 4ème Symposium International sur Proc. 2nd International Symposium on Precise Positioning with GPS, pp.32-33, 1990.

D. Initial-steps-toward-integrating, G. For-topex, /. Poseïdon, P. Willis, W. Bertiger et al., Preparation XXth International Union for Geodesy and Geophysics General Meeting, Poster) IGN CC/G n° 566, 1991.

L. Géodésique-À-l-'aide-du-système, D. , J. P. Dufour, C. Boucher, P. Willis et al., Journée Recherche de l'Institut Géographique National, p.568, 1992.

D. Processing, G. With-the, P. Willis, W. Bertiger, B. Haines et al., OASIS II software for Precise Point Positioning and Orbit Determination: First results and Intercomparaisons, transparents) IGN CC/G n°! 594, 1993.

R. The, P. Network-for-france, C. Willis, S. Boucher, H. Botton et al., A densification of the ITRF International Earth Rotation Service and International GPS Service for Geodynamics Workshop, transparents) IGN CC/G n° 603, 1994.

P. Willis, C. Boucher, J. Ph, and . Dufour, The contribution of the DORIS system to the global terrestrial reference frame, Z. Altamimi, N. Bondarenco, DOSE meeting (Dynamic Of the Solid Earth), p.610, 1994.

D. :-nouvelle-technique-de-l-'iers and P. Willis, Journée de la Recherche à l'IGN, Saint-Mandé, Mars, p.4, 1995.

P. Des-canevas-nationaux and . Willis, Forum rencontre: l'évolution des canevas nationaux face aux levés par GPS, Saint-Mandé, Mars, p.1, 1995.

P. Guide-de-l-'utilisateur-du-gps-pour-la-localisation, F. Willis, S. Duquenne, M. Botton, J. Y. Even et al., Forum rencontre: l'évolution des canevas nationaux face aux levés par GPS, p.2, 1995.

D. Nouvelle-technique-de-l, IERS: Implications pour l'altimétrie radar, P. Willis, Réunion préparatoire au SWT Topex/Poseïdon, p.14, 1995.

D. , I. Terrestrial-reference, and . Frame, Open questions and comments, P. Willis, ITRF Workshop, Saint-Mandé, 8-9 Mai, p.13, 1995.

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S. Calmant, J. J. Valette, and D. Maillard, Absolute and relative motion of Geodetic sites on both sides of a fast subduction zone (New Hebrides trench, SW Pacific), GPS stations versus DORIS beacons, 1996.

D. Localisation, P. Ign, D. Willis, T. Spot, and . Poseïdon, Groupe de revue d'exploitation des missions, p.37, 1997.

P. Willis, J. Zumberge, and I. /. Iamas-conference, Estimation of the tropospheric delay using the DORIS system in a multi-satellite mode, 1997.

P. Willis, P. Sillard, C. Boucher, and . Topex, Impact and deficiencies of the new ITRF-96 geodetic reference frame for oceanographic purposes, Actes du Symposium International sur la Surveillance des Océans à l'horizon, pp.13-17, 1997.

P. Sillard, P. Willis, and C. Boucher, GPS and DORIS combined geocenter motion from reference frame time series analysis, pp.8-12

V. Poseïdon, N. Kaistrenko, P. Vasilenko, and . Willis, and Earth crust deformation detected by Topex, The great Shikotan Earthquake and tsunami Actes des Journées DORIS (poster), pp.27-29, 1994.

S. Calmant, A. Cazenave, J. J. Valette, P. W. Topex, /. Poseïdon et al., Terrestrial reference frame differences for, MOTEVAS: Mouvements tectoniques verticaux par altimétrie satellitaire Actes des Journées DORIS (poster), pp.27-29, 1998.

L. Morel, P. Willis, S. Jason, S. Raphael, L. Morel et al., Octobre 1999 (poster), 1999. http://www-aviso.cls.fr/documents/swt/posters, Systematic effects of terrestrial reference frames on mean sea level determinationpdf Effect on systematic errer (stations coordinates and Earth Orientation Parameters), 1999.

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B. J. Haines, S. Desai, P. Willis, D. Kuang, T. Munson et al., Early Results from the TurboRogue Space Receiver on Jason-1: Is a 1-cm Orbit Within Reach, Precise Orbit determination group, 2002.

C. Ids-data-center-update, P. Noll, . Willis, Z. Feissel, J. P. Altamimi et al., http://ids.cls.fr/html.report/ids_workshop_2002/CN_DPE2002.pdf IDS contribution to global monitoring of planet Earth Analysis, IDS Wokshop, 2002.

D. The, G. Pilot-experiment-status, M. Tavernier, F. Feissel, C. Lemoine et al., présentation orale, abstract # IDS-047 Preliminary results of simultaneous Precise Orbit Determination of TOPEX and JASON in the tandem mode using the DORIS data, 2002.

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T. Altimétrie and . Jason, oceanobs.com International Association of Geodesy http://www.iag-aig.org http://www.gfy.ku.dk/~iag «! The miracle is not that I finished?The miracle is that I had the courage to start»