Chopo Ma  Geophysicist   Space Geodesy Laboratory, Code 697   Solar System Exploration Division  NASA Goddard Space Flight Center  Greenbelt, MD 20771   Chopo.Ma@nasa.gov  Phone: 301-614-6101

EDUCATION:

• A.B., 1967: Chemistry and Physics, Harvard University
• Ph.D., 1978: Physics, University of Maryland

• VLBI modeling and analysis, reference frames, extragalactic astrometry, kinetics of deformation and plate motion, Earth orientation variations.

PROFESSIONAL SOCIETIES

• American Geophysical Union
• American Astronomical Society
• International Astronomical Union

DIRECTING BOARDS

• National Earth Rotation Service (NEOS)
• International Earth Rotation Service (IERS)
• International VLBI Service for Geodesy and Astrometry (IVS)

PANELS

• IERS Working Group for the International Terrestrial Reference Frame
• IAU Working Group on the International Celestial Reference System
• Task Group T1 - International Celestial Reference Frame - leader
• Task Group T5 - Computational Consequences