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Space Geodesy

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EAM - Atmospheric and Hydrospheric Earth Rotation Excitations

The GFZ contributes to the Global Geophysical Fluid Center (GGFC) of the International Earth Rotation and Reference Systems Service (IERS) by providing matter and motion terms of effective angular momentum functions (EAM). EAMs are due to mass trans…
GFZRNX - RINEX GNSS Data Conversion and Manipulation Toolbox

GFZRNX is a toolbox designed and created for the needs of the GNSS community. It supports RINEX observation, navigation and meteorological data. The major tasks include checking, repairing and manipulating (sampling, selection of satellite systems a…
GNSS Meteorology

GNSS data from the geodetic receivers of global and regional ground networks are operationally analysed at GFZ in near-real time. The atmospheric data products, like zenith total delay and converted integrated water vapour above the ground stations,…
Globalwaterstorage Information Portal

The globalwaterstorage.info information portal is complementary to GravIS. While GravIS is mainly addressing scientists and students who do not necessarily have to be experts in geodesy but at least have a certain basic knowledge about GRACE/-FO or …
GravIS - Gravity Information Service

The Gravity Information Service (GravIS) visualizes and describes Level-3 products based on the most recent GRACE and GRACE-FO gravity field release from GFZ. The products presented at GravIS are available for download at GFZ's Information System a…
IAG Services - Services of the International Association of Geodesy (IAG Services)

The International Association of Geodesy (IAG) is the scientific organization in the field of geodesy. It promotes scientific cooperation and research in geodesy on a global scale and contributes to it through its various research bodies. It is a me…
IGS Analysis Center

As one of the analysis centers of the International GNSS Service (IGS), we process thousands of GNSS observations daily to derive precise station coordinates, satellite orbits, satellite clock corrections and Earth rotation parameters. In line with …
IGS Reprocessing Campaigns

After the successful first full reprocessing of the International GNSS Service (IGS), the Analysis Centers (ACs) of the IGS started the second reprocessing in 2010. The complete history of GPS data collected by the global IGS network since 1994 was …
ILRS - International Laser Ranging Service

The International Laser Ranging Service (ILRS) was established as one of the IAG measurement services in 1998, with a charter to organize and coordinate world-wide Satellite Laser Ranging (SLR) and Lunar Laser Ranging (LLR) activities to support pro…
IVS - International VLBI Service for Geodesy and Astronomy

Very Long Baseline Interferometry (VLBI) is a highly accurate technique, used since the 1970s in geodesy that has delivered groundbreaking scientific discoveries. This technique allows scientists to measure global distances with millimeter accuracy;…
MGEX - Analysis Center of the Multi-GNSS Experiment

The Multi GNSS Experiment (MGEX) was initiated by the IGS in 2012. In MGEX all available signals of the new GNSS satellites are analysed. Currently, seven IGS analysis centers generate consistent and precise orbits and clock corrections of the new s…
Satellite Receiving Station at Ny-Ålesund (Spitsbergen)

The GFZ Helmholtz Centre for Geosciences operates a satellite receiving station at Ny-Ålesund, Spitsbergen (78° 55´ North, 11° 56´ East) to receive data from research satellites in polar orbits. The station is located about 1 km outside the village,…
TIGA - Processing Center of the Tide Gauge Benchmark Monitoring Working Group

Being a modern geodetic measuring method, GNSS (Global Navigation Satellite Systems) has reached an important role in geosciences. Within the scope of the Tide Gauge Benchmark Monitoring Working Group (TIGA-WG) of the IGS, GFZ analyses and reprocess…
GFZ-1 - Geo Research Satellite inactive

GFZ-1, the first satellite of the GeoForschungsZentrum Potsdam (GFZ), was designed as a small, passive satellite, equipped with 60 retro-reflectors to be illuminated from the ground by the global network of satellite laser ranging (SLR) systems. The…
GRACE - Gravity Recovery and Climate Experiment inactive

GRACE was a joint project between the National Aeronautics and Space Administration (NASA) and the Deutsches Zentrum für Luft- und Raumfahrt (DLR). The mission has been proposed in 1996 jointly by the University of Texas at Austin, Center for Space …