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Three levels of accuracy

Three levels of accuracy

Differential GPS with EGNOS or OmniSTAR® correction

The vehicle with a GPS antenna receives signals from the GPS satellite constellation. The EGNOS or OmniSTAR® services, which have a number of ground based GPS receivers spread across the area for which they deliver a correction, receive the same GPS messages as the vehicle. They are able to calculate the real time position error and send this as a message to control stations, which then upload the message to a geostationary satellite. The geostationary satellite receives the correction message, and re-transmits it back to the receiver on the vehicle.

  Pass-to-Pass Year-to-Year
EGNOS +/- 20 cm +/- 90 cm
OmniSTAR® XP* +/- 12 cm +/- 25 cm
OmniSTAR® HP* +/- 10 cm +/- 25 cm

New Holland cannot guarantee performance and availability of EGNOS and OmniSTAR® services.
*OmniSTAR® correction requires subscription to OmniSTAR® service.

RTK (Real Time Kinematic)

This is a highly precise technology that results in 2.5 cm year-to-year accuracy. This accuracy can be achieved with two communication technologies, depending upon your needs in terms of working area coverage:

  Pass-to-Pass Year-to-Year
RTK +/- 2.5 cm +/- 2.5 cm

RTK uses a local ground based station which receives the same position data as the mobile unit. By comparing the received position to its known actual position, the real time error can be calculated. This error is then transmitted via short wave radio to the mobile unit. By combining GPS and Glonass constellation input, accuracy can be further improved. Radio repeaters can be positioned to fill in any areas of signal loss from the base station. Signal loss could be caused by rugged terrain or thick vegetation.

Precise Technology...

Precise Technology

Part of the Agricar Group of Companies

Registered Office:

Agricar Limited, 6 Lochside Road, Forfar, Angus, DD8 3JE 01307 462281
Registered No.
100191
VAT Reg No.
401 0555 14
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Agricar 2013
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