| GPS is used to establish the
location of the vehicle using GPS satellites. The data can be used to establish the road
centreline or the position of roadside events.
With GPS receivers there is a
price-performance tradeoff. We offer a range of configurations and
accuracy’s to suit your requirements and budget.
The Starfire system (www.navcomtech.com)
provides real-time differential corrections and accuracy on of better than
10cm anywhere in the world. The output positions rate can be up to 50Hz
(depending on model).
The Trimble XRS/XR,
XT and XH receivers, all have sub meter post-processed DGPS accuracy.
Using our ROMDAS for Windows software with any
of the above Trimble receivers, the receiver settings are directly
controlled from ROMDAS and the data can additionally be stored as Trimble
SSF files which can be differentially post processed using Trimble
Pathfinder Office (Pathfinder Office software is an additional purchase) or
the Pathfinder Express online service.
The GARMIN 12XL
system will give accuracies in the 6-10 m range. It cannot be
post-processed. This is adequate for many applications.
All receivers supplied
by us come complete with vehicle power supplies, magnetic mounted antennae
and other cables as needed to connect to the PC. |