• 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
    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
    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.

KPGO Blog
  • 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

Tour of GGAO during NASA's Social Media Day, November 3, 2017
11/20/2017

As part of NASA's Social Media Day, held November 3, 2017, the Space Geodesy Project provided a tour of the Goddard Geophysical and Astronomical Observatory (GGAO) to 50 social media users selected by NASA. View scenes from the tour, courtesy of Conner Sebreny.


New release of the calc/solve analysis package available
11/17/2017

The NASA GSFC VLBI Group is pleased to announce a new release of the calc/solve analysis package. This release fixes several bugs and offers better support for vgosDB. It also allows the user to use a model for galactic aberration. For questions, contact (sergei.bolotin@nasa.gov) Dan MacMillan (Daniel.s.MacMillan@nasa.gov), or John Gipson (john.m.gipson@nasa.gov).


CDDIS Computer System Outage will affect SGP website
11/15/2017

CDDIS must undergo an unplanned outage on 16-Nov-2017 from 14:00-18:00 EST (19:00–22:00 UTC) to replace critical system hardware. Because the SGP website is hosted on the CDDIS server, there may be extended interruptions in connectivity to the SGP website during this period. We expect that the system outage will not require the full 4 hours but have allocated time to address any unforeseen issues.

We apologize for any inconvenience these outages may cause the user community.


GRACE mission ends science operations
10/27/2017

After more than 15 productive years in orbit, the U.S./German GRACE (Gravity Recovery and Climate Experiment) satellite mission has ended science operations. During their mission, the twin GRACE satellites have provided unprecedented insights into how our planet is changing by tracking the continuous movement of liquid water, ice and the solid Earth.

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Interruptions in network connectivity to SGP website
10/27/2017

The CDDIS network will undergo maintenance on Tuesday, October 31, 2017 between 15:00 - 19:00 UTC. Because the SGP website is hosted on the CDDIS server, there may be extended interruptions in connectivity to the SGP website during this maintenance period but we expect only short 5-10 minute outages during the timeframe.

We apologize for any inconvenience these outages may cause the user community.


Chopo Ma retires
10/01/2017

Photo of CHopo Ma

After a very long and distinguished career in VLBI, Chopo Ma has retired from NASA, effective September 30, 2017. We wish Chopo the best for the next stage in his life. With his retirement, Frank Lemoine has been named the new Space Geodesy Project Scientist.




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Staff profiles