GNSS is the abbreviation for Global Navigation Satellite Systems and includes:
- GPS: Global Positioning System (USA)
- GLONASS: Global`naya Navigatsionnaya Sputnikovaya Sistema (Russia)
- Galileo (EU/ESA)
- BeiDou (China)
BeiDou constellation also contains with inclined geosynchronous orbiting (IGSO) and geostationary satellites (GEO) as a regional component supporting navigation applications in the Asian region. There are also some other systems dedicated to regional applications:
- QZSS: Quasi zenith satellite system (Japan)
- IRNSS: Indian regional navigation satellite system (India)
- EGNOS: European Geostationary Navigation Overlay System (EU/ESA)
- WAAS: Wide Area Augmentation System (USA)
The principle of GNSS measurements is explained here.
AIUB is part of the Center for Orbit Determination in Europe (CODE) consortium. As such, the research conducted at AIUB in the field of GNSS data processing and modelling is driven by the activities of the CODE analysis center for the International GNSS Service (IGS). Some of the projects and selected results are introduced in the subsequent pages:
- GNSS orbit modelling
- GLONASS ambiguity resolution
- Clock modelling
- Handling of GNSS biases
- Combination of multi-GNSS products
- Near-real time GNSS data processing for an hazard early warning system.
