The International DORIS Service (IDS): Toward maturity |
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| Authors: | Pascal Willis Hervé Fagard Pascale Ferrage Frank G Lemoine Carey E Noll Ron Noomen Michiel Otten John C Ries Markus Rothacher Laurent Soudarin Gilles Tavernier Jean-Jacques Valette |
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| Institution: | 1. Institut Géographique National, Direction Technique, 2, Avenue Pasteur, 94165 Saint-Mandé, France;2. Institut de Physique du Globe de Paris, Géophysique Spatiale et Planétaire, UFR STEP, 35 rue Hélène Brion, 75013 Paris, France;3. Institut Géographique National, Service de Géodésie et de Nivellement, 2, Avenue Pasteur, 94165 Saint-Mandé, France;4. Centre National d’Etudes Spatiales, 18 Avenue Edouard Belin, 31401 Toulouse Cedex 9, France;5. NASA, Goddard Space Flight Center, Code 698, Greenbelt MD 20771, USA;6. NASA, Goddard Space Flight Center, Crustal Dynamics Data Information System, Code 690, Greenbelt MD 20771, USA;g Delft University of Technology, Faculty of Aerospace Engineering, Dept. Earth Observation and Space Systems, Kluyverweg 1, 2629 HS Delft, The Netherlands;h European Space Operations Center, Navigation Support Office, Robert Bosch St. 5, 64293 Darmstaadt, Germany;i University of Texas at Austin, Center for Space Research, 3925 W. Braker Lane, Suite 200, Austin, TX 78759-5321, USA;j ETH Zurich, Institute for Geodesy and Photogrammetry, HPV G52, Schafmattstr. 34, CH-8093 Zurich, Switzerland;k Collecte Localisation Satellites, 8-10 rue Hermès, Parc technologique du Canal, 31520 Ramonville Saint-Agne, France |
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| Abstract: | DORIS is one of the four space-geodetic techniques participating in the Global Geodetic Observing System (GGOS), particularly to maintain and disseminate the Terrestrial Reference Frame as determined by International Earth rotation and Reference frame Service (IERS). A few years ago, under the umbrella of the International Association of Geodesy, a DORIS International Service (IDS) was created in order to foster international cooperation and to provide new scientific products. This paper addresses the organizational aspects of the IDS and presents some recent DORIS scientific results. It is for the first time that, in preparation of the ITRF2008, seven Analysis Centers (AC’s) contributed to derive long-term time series of DORIS stations positions. These solutions were then combined into a homogeneous time series IDS-2 for which a precision of less than 10 mm was obtained. Orbit comparisons between the various AC’s showed an excellent agreement in the radial component, both for the SPOT satellites (e.g. 0.5–2.1 cm RMS for SPOT-2) and Envisat (0.9–2.1 cm RMS), using different software packages, models, corrections and analysis strategies. There is now a wide international participation within IDS that should lead to future improvements in DORIS analysis strategies and DORIS-derived geodetic products. |
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| Keywords: | DORIS Global Geodetic Observing System Terrestrial reference frame Precise orbit determination |
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