Fugro's Starfix.G2 is a GPS and GLONASS (Russian Global Satellite Navigation System) positioning system that is based on orbit and clock corrections generated from Fugro's own expanded network of dual system reference stations. Starfix.G2 is a Precise Point Positioning (PPP) technology, which distinguishes itself from the traditional differential approach as satellite errors are not lumped together but estimated per source, per satellite. The GPS/GLONASS orbit and clock corrections are computed separately, free of ionospheric and tropospheric effects.
The Fugro G2 service uses all available satellites to produce a composite position, offering a number of advantages:
• Additional satellites confirming the calculated position build confidence and reliability
• Better resistance to ionospheric scintillation effects which tend to affect a particular part of the sky
• Possibility to bridge periods of bad geometry for each of the separate systems