G51C:
The Global Geodetic Observing System: Ground- and Space-Based Infrastructure for Earth and Planetary Rotation II

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Session ID#: 16255

Session Description:
The Global Geodetic Observing System (GGOS) provides measurements of the time varying gravity, rotation, and shape of the Earth using geodetic and gravimetric instruments located on the ground and in space. These measurements need to be accurate to better than a part per billion in order to advance our understanding of the underlying processes that are causing the Earth's rotation, gravity, and shape to change. Mass transport in the global water cycle, sea level and climate change, and crustal deformation associated with geohazards are examples of particularly demanding applications of geodetic and gravimetric measurement systems. Designing and deploying the ground and space-based instruments that are needed to provide geodetic and gravimetric measurements of the accuracy and stability required are an ongoing challenge for GGOS. This session will be a forum for discussing the current status and future plans of the evolving ground and space-based geodetic and gravimetric measurement systems.
Primary Convener:  Richard S Gross, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States
Conveners:  Veronique M A Dehant, Observatoire Royal de Belgique, Brussel, Belgium, Erricos C Pavlis, Goddard Earth Sciences Technology and Research, Greenbelt, MD, United States and Michael R Pearlman, Center for Astrophysics, Radio and Geoastronomy Division, Cambridge, MA, United States
Chairs:  Richard S Gross, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States, Erricos C Pavlis, Goddard Earth Sciences Technology and Research, Greenbelt, MD, United States, Veronique M A Dehant, Observatoire Royal de Belgique, Brussel, Belgium and Michael R Pearlman, Center for Astrophysics, Radio and Geoastronomy Division, Cambridge, MA, United States
OSPA Liaison:  Richard S Gross, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States
Index Terms:

1221 Lunar and planetary geodesy and gravity [GEODESY AND GRAVITY]
1239 Earth rotation variations [GEODESY AND GRAVITY]
1240 Satellite geodesy: results [GEODESY AND GRAVITY]
1241 Satellite geodesy: technical issues [GEODESY AND GRAVITY]

Abstracts Submitted to this Session:

IVS: Current Status and Future Plans (Invited) (118932)
Dirk Behrend, NVI, Inc./NASA GSFC, Greenbelt, United States, Axel Nothnagel, University of Bonn, Institute of Geodesy and Geoinformation, Bonn, Germany, William T Petrachenko, Dominion Radio Astro Phys Obs, Penticton, BC, Canada and Gino Tuccari, Istituto di Radioastronomia, INAF, Noto, Italy
ILRS: Current Status and Future Challenges (143744)
Michael R Pearlman, Center for Astrophysics, Radio and Geoastronomy Division, Cambridge, MA, United States, Giuseppe Bianco, Agenzia Spaziale Italiana, CGS, Matera, Italy, Stephen Merkowitz, NASA Goddard Space Flight Center, Greenbelt, MD, United States, Carey E Noll, NASA Goddard Space Flight Center, Code 61A, Greenbelt, MD, United States, Erricos C Pavlis, Goddard Earth Sciences Technology and Research, Greenbelt, MD, United States, Victor Shargorodsky, JC"RPC"PSI", Moscow, Russia and Zhang Zhongping, Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai, China
The International DORIS Service: Current Status and Future Plans (141638)
Laurent Soudarin1, Pascal Willis2, Richard Biancale3, Pascale Ferrage4, Hugues Capdeville5, Jean-Michel Lemoine4, Brian J Luzum6, Guilhem Moreaux7, Carey E Noll8, Michiel Otten9, Jérôme Saunier2 and Marek Ziebart10, (1)CLS (Collecte Localisation Satellites), Ramonville, France, (2)IGN Institut National de l'Information Géographique et Forestière, Paris Cedex 13, France, (3)GET-CNES, OMP, Toulouse, France, (4)CNES French National Center for Space Studies, Toulouse Cedex 09, France, (5)Collecte Localisation Satellites, Ramonville-Saint-Agne, France, (6)US Naval Observatory, Washington, DC, United States, (7)Collecte Localisation Satellites (CLS), Ramonville-Saint-Agne, France, (8)NASA Goddard Space Flight Center, Code 61A, Greenbelt, MD, United States, (9)PosiTim UG, Seeheim-Jugenheim, Germany, (10)University College London, COMET, Dept of Civil, Environ & Geomatic Eng, London, United Kingdom
The International Gravity Field Service (IGFS): Present Day Activities And Future Plans (145178)
Riccardo Barzaghi, Politecnico di Milano, Milano, Italy and Georgios S. Vergos, Aristotle University of Thessaloniki, Thessaloniki, Greece
Models and Measurements of the Rotation of Mars (Invited) (123105)
William M Folkner1, Alex S Konopliv2, Ryan S Park3, Veronique M A Dehant4, Marie Yseboodt4 and Attilio Rivoldini4, (1)Jet Propulsion Laboratory, Pasadena, CA, United States, (2)Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States, (3)Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States, (4)Observatoire Royal de Belgique, Brussel, Belgium
The long-term rotational stability of terrestrial planets with viscoelastic lithospheres: A new theory with application to Mars (167669)
Ngai-Ham Chan, University of Toronto, Toronto, ON, Canada, Kimberly Moore, Harvard University, Earth and Planetary Sciences, Cambridge, MA, United States, Amy Daradich, University of Ottawa, Ottawa, ON, Canada and Jerry X Mitrovica, Harvard University, Department of Earth and Planetary Sciences, Cambridge, United States
Are Decadal Fluctuations in Length of Day Caused by Magnetic Waves in the Core? (Invited) (150155)
Bruce A Buffett, University of California Berkeley, Earth and Planetary Science, Berkeley, CA, United States, Nicholas R Knezek, University of California Berkeley, Berkeley, CA, United States and Richard T Holme, Max Planck Institute for Solar System Research, Katlenburg-Lindau, Germany
Revisiting the hypothesis of equating the 6-year oscillation in the length-of-day to the mantle-inner core gravitational coupling (143644)
Benjamin Fong Chao, Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan

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