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Geodesy and Gravity

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AOD1B - GRACE Atmosphere and Ocean De-Aliasing Level 1B Product

The Atmosphere and Ocean De-Aliasing Level-1B (AOD1B) Product provides a priori information about temporal variations in the Earth's gravity field due to global mass variability in the Atmosphere and ocean. It is based on analysis and forecast data …
Atmospheric and Hydrospheric Surface Loading Deformations

GFZ provides surface loading products including vertical and horizontal deformations of the crust imposed by surface loading of geophysical fluids in Atmosphere, oceans, and the continental hydrosphere. Products are provided with a spatial resolutio…
CVO - Central European Volcanic Province Observatory

The primary scientific goal of the Central European Volcanic Province Observatory is to better understand and map the processes in transcrustal magma systems beneath distributed intraplate volcanic fields, and to assess their volcanic hazard and the…
Focus sites: Etna and Southern Italy Volcanoes

Mt. Etna (Eastern Sicily), located in one of the most complex tectonic environments, is one of the most active and best monitored volcanoes around the world. It is characterized by multi-hazard activity that endangers the densely populated area. Act…
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 Station Network

Since the early 1990s, the GFZ has operated a global GNSS station network with currently about 70 stations for precise satellite clock & orbit determination, realization of the terrestrial reference frame, radio occultation measurements or studies o…
GONAF - Geophysical Observatory at The North Anatolian Fault

GONAF (Geophysical Observatory at the North Anatolian Fault) is a combined surface and downhole based observatory to measure tectonic deformation transients (seismic and aseismic) along the overdue Marmara segment of the North Anatolian Fault Zone (…
GRACE-FO - Gravity Recovery and Climate Experiment-Follow-On Mission

The primary objective of the GRACE-FO Mission is, as for GRACE, to obtain precise global and high-resolution models for both the static and the time variable components of the Earth's gravity field. As in the original GRACE mission, this goal is ach…
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…
ICGEM - International Centre for Global Earth Models

The determination of Earth’s global gravity field is one of the main tasks of geodesy: it serves as a reference for geodesy itself and provides essential information about the Earth, its interior and its fluid envelope for all geosciences. Thus, it …
IDS - International Doris Service

The Doris (Doppler Orbitography and Radiopositioning Integrated by Satellite) system is a French satellite system used for precise orbit and positioning determination. It is based on the Doppler Effect principle consisting of a terrestrial beacon ne…
IERS - International Earth Rotation and Reference Systems Service

The International Earth Rotation and Reference Systems Service (IERS) was established in 1987 by the International Astronomical Union and the International Union of Geodesy and Geophysics. The primary objectives of the IERS are to serve the astronom…
IGETS Database - Database of the International Geodynamics and Earth Tide Service

The International Geodynamics and Earth Tide Service (IGETS) is one of five services coordinated by the International Gravity Field Service (IFGS) of the International Association of Geodesy (IAG). The main objective of IGETS is to monitor temporal …
IGFS - International Gravity Field Service

IGFS is a unified “umbrella” IAG service, which: (i) Coordinates collection, validation, archiving and dissemination of gravity field related data (ii) Coordinates courses, information materials and general public outreach relating to the earth’s gr…
IGS - International GNSS Service

The International GNSS Service (IGS) is a service of the International Association of Geodesy (IAG). It provides Global Navigation Satellite Systems (GNSS) data and products with highest quality to the scientific community and beyond.

GFZ contri…
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…
IPOC - Integrated Plate Boundary Observatory Chile

IPOC is an international network of institutions and scientists organising and operating a distributed system of instruments and projects dedicated to the study of the subduction system, its role in landscape evolution, and associated geohazards at …
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…
SAGOS - South African Geodynamic Observatory Sutherland

The South African Geodynamic Observatory Sutherland (SAGOS) of GFZ was established during the years 1998 – 2000 based on an Agreement on Cooperative Activities between the National Research Foundation (NRF) and GFZ, signed in August 1998. SAGOS is l…
Satellite Laser Ranging Station Potsdam

The Satellite Laser Ranging (SLR) Station of the GFZ Potsdam has been continuously operating within the framework of the International Laser Ranging Service (ILRS) since January 2003. The method of satellite laser ranging was established in 1964 and…
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…
ZUGOG - Zugspitze Geodynamic Observatory

The Zugspitze Geodynamic Observatory (ZUGOG) was established in September 2018 on top of mountain Zugspitze in the European Alps, with the dual targets of validation and calibration of GRACE-FO and supporting research into alpine mountain building p…
CHAMP - CHAllenging Minisatellite Payload inactive

CHAMP (CHAllenging Minisatellite Payload) was a German small satellite mission for geoscientific and atmospheric research and applications, managed by GFZ. With its highly precise, multifunctional and complementary payload elements (magnetometer, ac…
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…
GOCE - Gravity Field and Steady-State Ocean Circulation Explorer inactive

The Earth explorer satellite GOCE (Gravity Field and Steady-State Ocean Circulation Explorer) was the first satellite mission within the framework of the Living Planet Program of ESA. This satellite mission was mapping the Earth's gravity field on g…
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 …