• 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
    GGAO VGOS
    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
    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

The Space Geodesy Project completed the Factory Acceptance Testing (FAT) of SGSLR's Gimbal and Telescope Assembly Unit #1 (GTA#1)
06/17/2022
SGSLR's Gimbal and Telescope Assembly Unit #1 at GGAO, MD, USAThe Space Geodesy Project completed the Factory Acceptance Testing (FAT) of SGSLR's Gimbal and Telescope Assembly Unit #1 (GTA#1) in early June 2022 at the manufacturer's facility (Cobham Advanced Electronic Solutions in Lansdale PA). After passing the FAT Review GTA#1 was then shipped to GGAO on June 21st and installed in the SGSLR facility on June 22nd by the prime SGSLR contractor, KBR, Inc. KBR and Cobham are currently preparing the gimbal and optics to start the Site Acceptance Testing (SAT).

New Jackscrew Successfully Installed on GGAO VGOS Antenna
06/17/2022
VGOS antenna at GGAO, MD, USAA new jackscrew and gearbox assembly were installed on the 12m VGOS antenna system at NASA Goddard Geophysical Astronomical Observatory (GGAO) in Greenbelt, Maryland during the week of June 6 – 10, 2022. The GGAO site operations and engineering management team from Peraton, antenna repair technicians from Intertronics Solutions, Inc. (ISI) – Calian and heavy equipment operations personnel from United Rigging in Beltsville, Maryland supported the repair activities. Replacement of the jackscrew improves overall structural and motion integrity associated with antenna pointing requirements and promotes continuous VLBI scientific research contributions from the NASA/SGP network.

The Space Geodesy Project completes the installation of the dome, riser, and optical bench support structure for the new NASA Space Geodesy Satellite Laser Ranging (SGSLR) station at Ny-Ålesund, Svalbard
05/18/2022
Ny-Alesund stationThe Space Geodesy Project completed the installation of the dome, riser, and optical bench support structure for the new NASA Space Geodesy Satellite Laser Ranging (SGSLR) station at Ny-Ålesund, Svalbard. The installation was performed by members of the SGSLR KBR team and the dome manufacturer Baader Planetarium, along with support from the Norwegian Mapping Authority and King's Bay AS. The Norwegian Mapping Authority hosted a Geodesy Event at Ny-Ålesund for Norwegian and United Nations dignitaries to celebrate this milestone. Dr. Karen St. Germain (NASA Earth Science Division Director) gave a public lecture on "The critical role that geodesy and the global observatories play in Earth observation" at the event and Stephen Merkowitz (Space Geodesy Project Manager) served on a discussion panel. The Norwegians also produced a short video for the event: Geodesy at the top of the world.

First year of Apache Point Lunar Laser Ranging data released under NASA stewardship
02/11/2022
Apache Point Laser ranging stationIn 2021, the Apache Point Lunar Laser Ranging station became part of the NASA Space Geodesy Network with New Mexico State University responsible for the on-site day-to-day operations and maintenance of the system. Over the past year, the NASA team worked with the former APOLLO team to establish best practices regarding observation and reduction of raw data into normal points, including the development of a new quality control process to identify centimeter-level biases in lunar laser ranging data. The new process helps to eliminate erroneous normal points and systematic biases prior to data publication. NASA Postdoctoral Fellow Nicholas Colmenares (one of the primary members of the former APOLLO group) led the development of the data procedures and archival of the data in the new version 2 of the Consolidated Range Data (CRD) format. The full set of 2021 data is now available from the Crustal Dynamics Data Information System (CDDIS) at https://cddis.nasa.gov/Data_and_Derived_Products/SLR/Lunar_laser_ranging_data.html.

The passing of Professor George Veis
01/31/2022
George VeisIt is with great sadness that we convey the passing of George Veis, scientist, teacher, and a good friend to all of us; truly one of the fathers of Space Geodesy. George continued to be endlessly creative, engaging, seducing, elegant, modern and forever young scientist, who shared his ideas with enthusiasm, and helped everyone with whom he had contact. He was a part of space geodesy from its birth, through its evolution from many meters to mm's, and he continued to think about its future until his death. He had celebrated his 92nd birthday last September 8, 2021.

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