The DGPS Base Stations from Racelogic send corrections via a telemetry radio
link to your GPS engine to improve positional accuracy to between 40cm and
2cm, depending on equipment used.
Most VBOXs are compatible with this system. Simply place the Base Station in
a fixed position, let it average the position for 5 minutes, and then you can
measure position to a new level of accuracy. For an application note on the
Base Station, please click
here.
There are two types available: Base Station 2, for 40cm and 20cm DGPS accuracy;
and Base Station 3 for 40cm DGPS and 2cm RTK accuracy.
As
an example, when the BS3 is used in conjunction with a VBOX3R2G2 (a
VBOXIII equipped with 20Hz RTK) then 2cm accuracy can be achieved. The table
below lists which VBOX/Base Station combination is required for specific
accuracies.
|
Product
|
WAAS/EGNOS
DGPS
|
40cm DGPS
Base Station
2 or 3
|
20cm DGPS
Base Station
2 Only
|
RTK
Base Station
3G Only
|
| VBOX DATA LOGGERS |
|
|
|
|
| VBOX Mini |
X
|
X
|
X
|
X
|
| VBOX Lite |
O
|
O
|
X
|
X
|
| VBOXII DCF |
O
|
O
|
X
|
X
|
| VBOXIIS |
O
|
O
|
O
|
X
|
| VBOXIISX (10Hz) |
O |
O |
O |
X |
| VBOXIISX (20Hz) |
O
|
O
|
O
|
X
|
| VBOXIISL |
O
|
O
|
X
|
X
|
| VBOX3i |
O
|
O
|
X
|
X
|
| VBOX3i R2G2 |
O
|
O
|
X
|
O
|
| |
|
|
|
|
| VBOX SPEED SENSORS |
|
|
|
|
| VBOX 5Hz Speed Sensor |
O |
O |
X |
X |
| VBOX 10Hz Speed Sensor |
O |
O |
O |
X |
| VBOX 20Hz Speed Sensor |
O |
O |
O |
X |
| VBOX 100Hz Speed Sensor |
O |
O |
X |
X |
| VBOX 100Hz R2G2 Speed Sensor |
O
|
O
|
X
|
O
|
KEY
O = Compatible
O = Compatible with Upgrade
X = Not Compatible |
 |
The Base Station communicates with a VBOX via a radio telemetry link.
Each Base Station has radio module integrated inside, and comes with an
external radio recevier for a VBOX which can work up to 10km away. To
get this full range, the Base Station has to be mounted as high as possible,
on the top of a building, hill or tall mast and be in direct line of sight
to the VBOX.
If the Base Station is placed on the side of the track, then you get
around 1.5-2km range, which is enough for most test tracks.
Applications for the Base Station include track mapping, route plotting, road
profiling and driver line analysis.
|
| 
)