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Sciences and Exploration Directorate
Operational

Space Geodesy Project (SGP)

The goal of the NASA Space Geodesy Project (SGP) is to build, deploy, and operate a next generation NASA Space Geodetic Network of integrated, multi-technique next generation space geodetic observing systems. This new NSGN will serve as NASA’s contribution to a global network designed to produce data required to maintain the Terrestrial Reference Frame and provide other data necessary for fully realizing the measurement potential of the current and coming generation of Earth Observing spacecraft.
SGP is part of the Earth Science Decadal and the National Research Council study "Precise Geodetic Infrastructure." It is a Goddard/JPL partnership with participation from the Smithsonian Astrophysical Observatory and the University of Maryland.

Launch Date

October 2011

Class

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Website

Key Staffs

The goal of the NASA Space Geodesy Project (SGP) is to build, deploy, and operate a next generation NASA Space Geodetic Network of integrated, multi-technique next generation space geodetic observing systems. This new NSGN will serve as NASA’s contribution to a global network designed to produce data required to maintain the Terrestrial Reference Frame and provide other data necessary for fully realizing the measurement potential of the current and coming generation of Earth Observing spacecraft.
SGP is part of the Earth Science Decadal and the National Research Council study "Precise Geodetic Infrastructure." It is a Goddard/JPL partnership with participation from the Smithsonian Astrophysical Observatory and the University of Maryland.

Related Publications

2025. "Assessment of the Earth orientation parameter accuracy from concurrent VLBI observations.", arxiv.org, (2506.15859): 34 [https://doi.org/10.48550/arXiv.2506.15859] [Journal Article/Letter]

2025. "Technology demonstration of the Geodetic Reference Instrument Transponder for Small Satellites (GRITSS).", Small Satellites Systems and Services Symposium (4S 2024), 131 [10.1117/12.3062660] [Proceedings]

2024. "A millisecond pulsar position determined to 0.2 milliarcsecond precision with VLBI.", Astronomy & Astrophysics, 691 (A47): 13 [10.1051/0004-6361/202451492] [Journal Article/Letter]

2025. "The Radio Fundamental Catalog. I. Astrometry.", The Astrophysical Journal Supplement Series, 276 (38): 51 pages [10.3847/1538-4365/ad8c36] [Journal Article/Letter]

2019. "Galactic Aberration in VLBI Analysis.", Proceedings of the International VLBI Service for Geodesy and Astrometry 2018 General Meeting: “Global Geodesy and the Role of VGOS–Fundamental to Sustainable Development”, Longyearbyen, Svalbard, June 3-8, 2018, NASA/CP–2019-219039 163-168 [Full Text] [Proceedings]