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Using Quasars to Measure the Earth: A Brief History of VLBI

Looking Down a Well: A Brief History of Geodesy



  • 12-meter VLBI system Celebrating 50 Years of Satellite Laser Ranging at NASA Goddard Space Flight Center 08/28/2014 In a field near Goddard 50 years ago this October, the first successful Satellite Laser Ranging (SLR) measurements were taken, ushering in a new era in the science of measuring the Earth.

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  • GGIM logo United Nations Meetings 08/27/2014 During the week of August 4-8, Ruth Neilan (NASA JPL) participated in and attended several meetings at the United Nations in New York, Department of Economic and Social Affairs, UN Statistics Division. Because of her involvement in these critical areas, Ruth has been appointed to the rank of official U.S. Delegate Advisor for the United Nations to UN Global Geospatial Information Management (GGIM).

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  • Goddard logo Robert H. Goddard Award Recipients 03/18/2014 Congratulations to the Space Geodesy Project Team for receiving the Robert H. Goddard Exceptional Achievement Group Award for Engineering. Additional congratulations goes to Jan McGarry, who received an individual Robert H. Goddard Award for Exceptional Engineering Achievement.
  • Staff Profile: Stephen Merkowitz, Project Manager
    Project manager Stephen Merkowitz talks about his work with NASA's Space Geodesy Project, including a brief overview of the four fundamental techniques of space geodesy: GPS, VLBI, SLR, and DORIS.

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  • Staff Profile: Jan McGarry, Mathematician
    Mathematician Jan McGarry discusses the science and history of Satellite Laser Ranging (SLR), her role in developing the Next Generation Satellite Laser Ranging system, and her career at NASA's Goddard Space Flight Center.

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  • Staff Profile: Chopo Ma, Space Geodesist
    Space geodesist Chopo Ma explains the science of Very Long Baseline Interferometry (VLBI): using radio emissions from distant galaxies to create a precise reference frame for the Earth.

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  • Staff Profile: Carey Noll, Computer Scientist
    Computer scientist Carey Noll talks about her job as manager of the Crustal Dynamics Data Information System (CDDIS), the applications of her work for various space geodesy techniques such as GPS, and her career at NASA's Goddard Space Flight Center.

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