Routine Operations

• 24/7 operations for GRAS Ground Support Network (GSN)
• Hosting and operation of ESAs GNSS Observation Network (EGON)
• Hosting and operation of a subset of the Galileo Experimental Sensor Stations (GESS)
• Operation of the ESOC time scale, contributing to UTC via UTC(ESA)
• Daily provision of precise orbits for the Sentinel spacecraft

Routine Analysis Centre Activities

• Galileo Geodetic Service Provider (GGSP)
• International GNSS Service (IGS) and International GNSS Real-Time Service (RT-IGS)
• International Laser Ranging Service (ILRS)
• International DORIS Service (IDS)

Precise Navigation and Timing

Precise Orbit Determination

• Low Earth Orbits (LEO)
• Medium Earth Orbits (MEO)
• Geo Stationary Orbits (GEO)

Precise Time Transfer/Synchronisation

• High-precision GNSS-based time transfer between UTC realisation at ESOC and ESA deep space stations

Reference Frames

• Contribution to ITRF with GNSS, SLR, and DORIS products
• Estimation and prediction of Earth Orientation Parameters (EOPs)
• Estimation of EGON station positions

Technical Capabilities

Supported Observation Techniques

• Global Navigation Satellite Systems (GNSS): GPS, Galileo , Glonass, BeiDou, QZSS, etc.
 • Satellite-based augmentation systems (SBAS): EGNOS, etc.
 • Satellite Laser Ranging (SLR)
• Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS)
• Satellite Altimetry
• Very Long Baseline Interferometry (VLBI) (under development)

Development of Models and Algorithms

• Atmospheric models
• Ionospheric models
• Detailed solar radiation pressure modelling