• Laser ranging to the moon
    Laser Ranging to the Moon
    NGSLR, located at NASA GSFC's Goddard Geophysical and Astronomical
    Observatory (GGAO),is shown ranging to the Lunar Reconnaissance Orbiter (LRO)
    orbiting the Moon. The LRO Laser Ranging (LR) system enables the spacecraft
    to achieve its precision orbit determination requirement.
  • antenna
    VGOS, located at NASA GSFC's Goddard
    Geophysical and Astronomical Observatory
    (GGAO), is the next generation of
    geodetic VLBI systems
  • Monument brace
    Drilled Brace Monument for GNSS Antenna
    The newly installed drilled brace monument for the
    Global Navigation Satellite System (GNSS) antenna at
    NASA GSFC's Goddard Geophysical and Astronomical
    Observatory (GGAO). The multi-GNSS-capable
    receiver tracks signals from several GNSS including
    GPS, GLONASS, and Galileo.
    DORIS Antenna
    The Doppler Orbitography and Radio-positioning Integrated
    by Satellite (DORIS) antenna located at NASA GSFC's Goddard
    Geophysical and Astronomical Observatory (GGAO) tracks
    satellites equipped with DORIS beacons; NGSLR can be seen
    in the background.

  • Sun pointing test

SGP is completing the implementation of a new 12-meter broadband Very Long Baseline Interferometry (VLBI) station at NASA's Kōkeʻe Park Geophysical Observatory (KPGO) on Kauai, Hawaii. This blog follows the progress towards the station completion with updates from the team about once a week.

Latest news

Network maintenance may afftect SGP website

Network maintenance may affect access to the SGP website beginning July 30, 3:00PM GMT. We expect this activity to last less than 30 minutes. We apologize for the inconvenience.

Second Circular for the 21st International Workshop on Laser Ranging Released

ILRW 21 LogoThe Space Environment Research Centre (SERC) and the International Laser Ranging Service (ILRS) are actively organizing the 21st International Workshop on Laser Ranging in Canberra, Australia during the week of November 05-09, 2018. The second circular has been released. Registration is now open and attendees are encouraged to submit an abstract for oral and poster sessions.

Celebrating 50 years of transatlantic geodetic radio science

Radome at MIT HaystackFifty years ago this week, in April 1968, an historic event took place involving MIT Haystack Observatory radio telescope in Westford, Massachusetts, and its counterpart at Onsala Space Observatory in Onsala, Sweden: the first transatlantic geodetic very long baseline interferometry (VLBI) observations.

This occasion marks an important anniversary in geodesy; although the April observations were not entirely successful in terms of usable data, as VLBI was in its very earliest days, it was the first time that geodetic VLBI was performed across the Atlantic.

Today, NASA's Space Geodesy Project (SGP) operates a worldwide system of modern geodetic sites, including the broadband VGOS (VLBI Global Observing System) network, in collaboration with international partners around the globe.

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New NASA VLBI Civil Servant position open for applications

A new NASA VLBI Civil Servant position is now posted and open for applications. There are two postings, one senior and one mid-level, and applicants should decide which one best fits his/her experience level:

GS-14: http://www.usajobs.gov/GetJob/ViewDetails/493509700

GS-15: http://www.usajobs.gov/GetJob/ViewDetails/493510000

The postings currently close on Tuesday, March 27, 2018. Please note that the job is only open to U.S. citizens and U.S. nationals.

New MIT Haystack Observatory blog for NASA/SGP-related activities

The MIT Haystack staff have started a blog which visually documents some of the NASA/SGP-related activities including KPGO, GGAO, Westford, and the MGO development.

UNAVCO News: The NASA Space Geodesy Project -- An Update

NASA’s Space Geodesy Project (SGP) was initiated in order to develop and maintain a global network of next-generation space geodetic observing instruments. Core sites around the globe will use three or four of the primary space-geodetic techniques: Very Long Baseline Interferometry (VLBI), Satellite Laser Ranging (SLR), Doppler Orbitography by Radiopositioning Integrated on Satellite (DORIS), and the Global Navigation Satellite System (GNSS). Deployments of these instruments with next-generation measurement capabilities have been underway since 2011.

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

Looking Down a Well: A Brief History of Geodesy

Staff profiles