GNSS Analysis at Dionysos Satellite Observatory
Global Navigation Satellite Systems
Global Navigation Satellite Systems (GNSS) are satellite systems to provide autonomous geo-spatial positioning providing global coverage. Suchs systems are:
- Global Positioning Systme (GPS) developed by the United States; GPS is operational since 1978 and globally available since 1994. It is the world's most utilized satellite navigation system.
- The formerly Soviet, and now Russian, Global'naya Navigatsionnaya Sputnikovaya Sistema, (GLObal NAvigation Satellite System or GLONASS); GLONASS has full global coverage since 1995 and its first satellite was launched in 1982.
- BeiDou developed by the People's Republic of China. BeiDou's global service was completed by December 2018
- GALILEO; The European Union and European Space Agency agreed in March 2002 to introduce their own alternative to GPS, called the Galileo positioning system. The first experimental satellite was launched on 28 December 2005 and it is expected to be fully operational by 2012.
GNSS Processing at DSO
The Past
Dionysos Satellite Observatory has been actively involved in GPS campaigns and processing since the mid 90's
The Present
Dionysos Satellite Observatory (DSO) of the National Technical University of Athens has developed an automated processing scheme to accommodate the daily analysis af all available continuous GNSS stations in Greece. This daily analysis process is implemented for the last five years, yielding results which help us further understand the complicated tectonic settings of Greece. Additionaly, analysis results are contributed to EUREF's Densification Project aiming to produce a dense European velocity field.
GNSS Processing dataset
At DSO we devide GNSS sites in different networks to make the processing scheme more efficient, robust and quick. We have a number of dofferent networks:
- CRLab : CRLab's local network of continuous GPS/GNSS stations placed on and around Corinth Rift, GR
- EPN : EUREF's European Permanent Network (EPN) of continuous GPS/GNSS stations
- GREECE : NTUA's network of continuous GPS/GNSS stations routinely processed
- NOANET : NOA's network of GPS/GNSS continuous stations
- SANTORINI : NTUA's local network of continuous GPS/GNSS stations placed on Santorini island