Education
Bachelor in Physics, University California, San Diego, 1971. Doctor of Philosophy in Planetary Science and Astronomy, California Institute of Technology, 1975.
Bachelor in Physics, University California, San Diego, 1971. Doctor of Philosophy in Planetary Science and Astronomy, California Institute of Technology, 1975.
Graduate research assistant California Institute of Technology, 1971—1975. Assistant scientist National Radio Astronomy Observatory, 1977—1978, associate scientist, 1979. Lecturer Harvard University, since 1979.
Center fellow Harvard-Smithsonian Center for Astrophysics, 1975—1977, radio astronomer, Smithsonian Astrophysical Observatory, 1979—1988, senior radio astronomer, Smithsonian Astrophysical Observatory, since 1988, associate director, radio & geoastronomy division, 1992—1997, director, Radio Telescope Data Center, 2000—2009. Visiting scientist Institute de Radio Astromomie Millimetrique, Grenoble, France, 1987. Visiting associate California Institute of Technology, 1991.
Member of International Union of Radio Science, American Astronomical Society (Top Astronomy Stories of 1986 for measurement of the distance to the Galactic Center, Beatrice M. Tinsley prize 2008), International Astronomical Union.