3.2 Specification
3.2.1 Topcon accuracy specifications
VarioGuide supports the following GNSS accuracy options:
Correction
services
Correction source
[1]
Static
accuracy
Dynamic
accuracy
AUTONOMOUS The position is determined without correction signals,
using only GPS and GLONASS satellites. Sub-meter
(SM) accuracy class
n/a n/a
EGNOS European Geostationary Navigation Overlay System,
free satellite service for Europe
+/- 150 cm +/- 20 cm
WAAS Wide Area Augmentation System, free satellite
service for North America
+/- 150 cm +/- 20 cm
OmniSTAR VBS OmniSTAR Virtual Reference Station, subscription
satellite service
+/- 80 cm +/- 20 cm
OmniSTAR HP OmniSTAR High Performance, subscription satellite
service
+/- 10 cm +/- 5 cm
Base station RTK corrections with a dedicated reference station
+/- 2 cm +/- 2 cm
RTK network RTK corrections via mobile communications network
(GSM/GPRS) or radio
+/- 2 cm +/- 2 cm
[1]
The specifications for the VarioGuide system are subject to GNSS system features, US Department of Defense
deteriorations in operation, ionospheric and tropospheric conditions, satellite geometries, length of the base line
and multipath effects. OmniSTAR VBS, OmniSTAR HP, WAAS and EGNOS are independent GNSS upgrade
services. AGCO accepts no responsibility for the performance of these services.
Accuracy of the system in the field
The achievable level of accuracy depends on various factors:
• Reception conditions of GNSS and correction signal
•
Tractor conditions, e.g. implement conditions and settings
• Conditions in the field
• Ground conditions
3.2.2 Trimble accuracy specifications
VarioGuide supports the following GNSS accuracy options:
Correction
services
Correction source
[1]
Static
accuracy
Dynamic
accuracy
AUTONOMOUS The position is determined without correction signals,
using only GPS and GLONASS satellites. Sub-meter
(SM) accuracy class
n/a n/a
EGNOS European Geostationary Navigation Overlay System,
free satellite service for Europe
+/- 150 cm +/- 20 cm
WAAS Wide Area Augmentation System, free satellite
service for North America
+/- 150 cm +/- 20 cm
3. VarioGuide definitions and specifications
VarioGuide 25
438.020.070.012