Gravity and Precise Orbit Determination system

GEORB (Gravity and precisE ORBit determination system) is a software for Precise Orbit Determination (POD), gravity field recovery and mission design. GEORB was created by Dr. Thomas Loudis Papanikolaou as a long-term project, initiated in 2007 and released as open source in 2022. It is designed as a versatile tool to support academic research in satellite geodesy and orbital mechanics as well as applications in Space Situational Awareness, Earth system science and space exploration.

GEORB is currently being utilised and further developed at DORUS Space Lab. It supports fundamental and operational research at universities and scientific organisations worldwide. In particular, GEORB has been deployed at the Aristotle University of Thessaloniki (GR), Aalborg University Copenhagen (DK) and the University of Newcastle (Australia) and has supported projects of the European Space Agency (ESA).

GEORB is licensed under the GNU Affero General Public License (AGPL v3.0) for the free open-source version oriented to academic and fundamental research. For information regarding dual-license options please contact us.

GEORB specialises in the analysis of satellite gravity missions and simulation of future space gravity missions, supporting revolutionary missions such as the Gravity Recovery And Climate Experiment (GRACE) and the Gravity Field and Steady-State Ocean Circulation (GOCE), and contributing to the preparation of the upcoming ESA/NASA Mass-Change and Geosciences International Constellation (MAGIC) mission, a constellation to be consisted by ESA’s Next Generation Gravity Mission (NGGM) and NASA’s GRACE-Continuity future missions. The current release delivers high-quality data products including precise orbits, calibrated accelerometer data and time-variable gravity field models for the NASA/GFZ’ GRACE Follow-On mission.