• 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 currently
    under development.
  • 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 will track 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.

Latest Project news

First announcement of the 22nd International Workshop on Laser Ranging
ILRS logoThe 22nd International Workshop on Laser Ranging will be held in Kunming, China November 02 - 06, 2020. There will be five days of interesting presentations, a lot of time for formal and informal discussions, meeting project partners and paving the road for the future development of satellite laser ranging.

During the workshop there will also be a chance to visit the laser ranging station in Kunming. Theme and session topics for the workshop are currently under discussion. The organizers are open for ideas and suggestions, so please contact the local organizing committee at ilrs.workshop@ynao.ac.cn if you would like to see specific topics included in the workshop.

Additional announcements will be made when registration and abstract submission are opened.

MGO SGSLR shelter is built and ready to accept the dome
SGSLR shelter at MGO ready to accept domeThe MGO SGSLR shelter is built and getting ready to accept the dome. This picture shows the temporary roof covering the dome ring wall and protecting that part of the roof where the hole for the gimbal is located. Dome installation is expected at the end of January 2020.

SGP version of GEODYN software now publicly available.
SGP logoThe SGP is making available to the public a version of the GEODYN orbit determination and geodetic parameter estimation software tool. A full description of the software and download options are available here:


Journal of Geodesy "Special Issue: Satellite Laser Ranging" now published
Cover of the Journal of GeodesyThe Journal of Geodesy has recently published the "Special Issue: Satellite Laser Ranging" (Volume 93, Issue 11, November 2019, editors Erricos Pavlis, Vincenza Luceri, Toshimichi Otsubo, Ulrich Schreiber). This issue consists of twenty papers detailing recent developments in SLR.

View the list of papers and authors

The 2019 ILRS Technical Workshop presentations and other information now available
2019 ILRS Technical Workshop bannerThe 2019 ILRS Technical Workshop was held October 21-24, 2019 in Stuttgart, Germany. In addition, the first "SLR School" was held prior to the workshop on October 20. All abstracts, presentations, posters, and summary information from the workshop and the SLR School are available on the website:


SLR Pioneer Certificates presented by Toshi Otsubo at the 2019 ILRS Technical Workshop
2019 ILRS Technical Workshop bannerDuring the 2019 ILRS Technical Workshop, Toshi Otsubo, chair of the ILRS Governing Board, presented the "SLR Pioneer Certificate" to the following recipients:

Victor Shargorodskiy (Research-and-Production Corporation «Precision Systems and Instruments«/ Moscow, Russia)
"In recognition of his role in the building and deploying of the ROSCOSMOS SLR network"

John McK. Luck (Geoscience Australia, retired/Canberra, Australia)
"In recognition of his work in establishing SLR activities in Australia and Western Pacific Laser Tracking Network">

Carey Noll (NASA GSFC/Greenbelt MD, USA)
"In recognition of her dedication, vision and creativity in supporting all aspects of the ILRS"

At the conclusion of the workshop, a "Recognition of Appreciation" certificate was presented to:

Daniel Hampf (DLR, Stuttgart, Germany)
"In recognition of the outstanding support provided in organizing and hosting the 2019 ILRS Technical Workshop, Stuttgart, Germany"

Congratulations to the recipients!

MGO SGSLR shelter goes up
Jason-2 satelliteThe MGO SGSLR shelter walls were installed on the SGSLR pad on October 15th. The first picture shows the first wall panel going into place. The dome ring wall was added after the building walls and roof were in place. Work continues on the framing, electrical, ducting and other parts of the interior.

View images of the new MGO SGSLR shelter...

The Jason-2 mission has ended
Jason-2 satelliteThe Jason-2/Ocean Surface Topography Mission (OSTM), the third in a U.S.-European series of satellite missions designed to measure sea surface height, successfully ended its science mission on Oct. 1. NASA and its mission partners made the decision to end the mission after detecting deterioration in the spacecraft's power system.

Read more about the Jason-2 mission...

NASA's Space Geodesy Project Mapping Out a Bright Future
Jason-2 satelliteThe Space Geodesy Project is featured in a new article published today on NASA's website. The article explains the role played by Very Long Baseline Interferometry (VLBI) in a variety of applications. SGP Manager, Stephen Merkowitz, explains the basic principle of VLBI, its most important function of building the International Terrestrial and Celestial Reference Frames, and the next generation of VLBI stations being installed in the US and around the world.

Read the full article on nasa.gov...

Read all news

Using Quasars to Measure the Earth: A Brief History of VLBI
Looking Down a Well: A Brief History of Geodesy