National Aeronautics and Space Administration

• NASA

• NASA Science
• GSFC Science Directorate
• GSFC Geodesy and Geophysics Laboratory (61A)

• International Association of Geodesy (IAG)

• Global Geodetic Observing System (GGOS)
• International Center for Earth Tides (ICET)
• International Centre for Global Earth Models (ICGEM)
• International DEM Service (IDEMS)
• International DORIS Service (IDS)
• International Earth Rotation and Reference Systems Service (IERS)
• International Service for the Geoid
• International GNSS Service (IGS)
• International Gravity Field Service (IGFS)
• International Laser Ranging Service (ILRS)
• International Terrestrial Reference Frame (ITRF)
• International VLBI Service for Geodesy and Astrometry (IVS)
• Permanent Service for Mean Sea Level (PMSL)
• Time Section of the International Bureau of Weights and Measures (BIPM)

• Other

• Norwegian Mapping Authority
• MIT Haystack Observatory