StarFire Network Global DGPS Service
The StarFire™ Network is the world's first Global Satellite Based
Augmentation System (GSBAS) capable of real-time decimeter accuracy. Performance
is no longer a function of your distance from a reference station, so you have
the freedom to use StarFire anywhere in the world.
Methodology
The StarFire Network is a major advance from earlier ground based
augmentation systems because it considers each of the GPS satellite signal error
sources independently. GPS satellite orbit and clock corrections are calculated
from a global tracking network of dual frequency receivers. These corrections
are transmitted via Inmarsat satellite links direct to StarFire receivers,
resulting in minimal data latency and worldwide operation from 75 degrees North
to 75 degrees South. All StarFire receivers use a dual frequency GPS receiver
that measures the ionospheric delay for each satellite. Tropospheric zenith
delays are calculated from a multi-state time and position model aided by
redundant satellite observables.
Reliability
Redundant data links, geographically separated processing hubs and dual
satellite uplink equipment ensure continuous reliable positioning. The system is
inherently robust with the ability to calculate a full set of corrections even
if multiple reference stations were to become unavailable.
Applications
StarFire receivers are available as fully integrated units or modular
systems. Applications that can benefit from StarFire performance, accuracy and
availability include:
- Land Survey
- Offshore Positioning
- Precision Agriculture
- Aerial Photogrammetry and LIDAR
- GIS and Asset Mapping
- Machine Control
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