FUGRO Starfix HP, DGPS, G2 Receivers

Fugro’s Starfix products and services provide vessels and rigs around the world with precise offshore positioning systems, the reliability, availability and coverage of which, help deliver safer operations.


Fugro is a market leader in satellite positioning, providing:

  • Worldwide solutions, using a small omnidirectional antenna or Inmarsat terminal
  • Highest levels of signal reliability to ensure continuous signal reception 
  • Dual independent links in all Inmarsat ocean regions
  • Centimetre and decimetre level of positioning accuracies
  • Global Navigation Satellite Systems (GNSS) capability using GPS, GLONASS, BeiDou and Galileo


A high precision GPS-only system, based on differential techniques. It uses Fugro’s network of reference stations to reduce or eliminate biases due to the troposphere, and the orbits and clocks of satellites. Ionospheric effects are eliminated by forming linear combinations of L1 and L2 observations (the ionospheric effects are frequency-dependent). Corrections calculated at the reference stations are transmitted to mobile users using geostationary communication satellites.

The Starfix.L1 system uses single frequency code correction data from Fugro’s network of reference stations. These corrections, combined with a single frequency GPS receiver, are used to produce a high accuracy position. This system can provide a positional accuracy of better than 1.5 m (95%) horizontally at a distance of 500 km from the closest reference station. 

A precise (sub-decimetre ) GPS and GLONASS positioning service based on orbit and clock corrections generated from Fugro’s own expanded network of dual system reference stations. Starfix.G2 utilises 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.