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

Looking Down a Well: A Brief History of Geodesy



  • 19th ILRS Workshop logo 19th International Workshop on Laser Ranging a great success 11/18/2014 The 19th International Laser Ranging Workshop was hosted by NASA GSFC from October 27-31, 2014 in Annapolis, Maryland. October 31 marks the 50th anniversary of the first successful Satellite Laser Ranging (SLR) measurement which occurred at the Goddard Geophysical and Astronomical Observatory (GGAO) in 1964. The theme for this workshop, "Celebrating 50 Years of SLR: Remembering the Past and Planning for the Future" allowed the community to look back on its many accomplishments and to present plans for future advances in SLR technology and science.

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  • 19th ILRS Workshop logo 19th International Workshop on Laser Ranging - Celebrating 50 years of SLR 09/24/2014 The National Aeronautics and Space Administration (NASA), along with the Smithsonian Astrophysical Observatory, and the International Laser Ranging Service (ILRS), are pleased to announce that the 19th International Workshop on Laser Ranging will be held in Annapolis Maryland during the week of October 27-31, 2014 at the Historic Inns of Annapolis.

    October 31, 2014 will mark the 50th anniversary of the first successful SLR measurement, conducted at what is now the Goddard Geophysical and Astronomical Observatory (GGAO). The theme for this workshop, "Celebrating 50 Years of SLR: Remembering the Past and Planning for the Future" will allow us to look back on our many accomplishments and present plans for future advances in SLR technology and science.

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  • NGSLR 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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  • 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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