DEFINITION:

Covers operation of GNSS sensor networks, GNSS-related data processing, techniques for precise orbit- and clock-determination concepts for MEOs and LEOs and satellite geodesy. It does not include GNSS downstream applications but only the use of GNSS signals to position and track space systems.

(Source: ESA TD 10B and PAE clarification)

SUBDOMAINS:

1. Ground Tracking Networks: Covers the deployment, operation and data collection for GNSS sensor stations, network management, data handling services.
2. GNSS and Geodetic Data Processing: Models, algorithms, data monitoring, data quality assessment and delivery of services and products.
3. MEO and LEO Precise Orbit Determination Algorithms: Orbit dynamics and related models, analytical and numerical algorithms, for real-time (ground) and non-real-time (onboard/ground) data processing, performance analysis.
4. Geodetic Reference Frames: Satellite geodesy, standards, processing of different observations.