National Aeronautics and Space Administration

Technique: End-to-end process that includes all components/segments (ground, space, data, etc.) of a geodetic measurement method (i.e. SLR, VLBI, etc.).

Station: One implementation of the ground component of a geodetic technique.

Station Subsystems: Major parts of a station, such as antenna, radar, telescope. Defined by the technique leads.

Next Generation Station: VLBI2010, NGSLR, GNSS.

Legacy Station: VLBI, MOBLAS etc., GPS.

Geodetic Site: Collection of one or more stations and common infrastructure at one physical location tied together with a VTS.

Site: A physical location of a station or co-located stations.

Fundamental Geodetic Site: Geodetic site with all three next generation geodetic stations: VLBI, SLR, and GNSS tied together with a VTS. DORIS desirable.

NASA Partner Site: Geodetic site owned or operated by another organization where NASA regularly commits resources by providing one or more NASA-owned stations and/or NASA regularly supports the maintenance and/or operations of one or more stations at that site.

NASA Partner Station: A NASA-owned or supported station at a NASA Partner Site.

Global Space Geodesy Network: Worldwide collection of stations that are members of the international services (ILRS, IVS, IGS, IDS).

NASA Space Geodesy Network: The collection of NASA and NASA partner stations.