Correction signals for CLAAS steering systems.

Available worldwide.

Correction signals for CLAAS steering systems.

Available worldwide.

Correction signals for CLAAS steering systems.

Accuracy of +/– 15–30 cm*

Licence-free correction signals. EGNOS / E-DIF

  • Crop spraying
  • Top-dressing fertiliser application
  • Tillage

+/– 5–12 cm*


  • Satellite-based correction signal
  • Dual-frequency signal
  • Subject to licence

+/– 4–6 cm*


  • For use in machinery fleets
  • Flexible operating radius / mobile reference station
  • Range 3–5 km
  • No licence fee
  • Proprietary correction signal
  • Integrated rechargeable battery

+/– 2–3 cm*

RTK base station

  • Base station
  • Range approx. 15 km
  • Licence also available via CLAAS dealership
  • Highest possible repeatable accuracy

+/– 2–3 cm*


  • Correction signal via mobile phone network
  • Dual-frequency signal
  • Unrestricted operating radius
  • Highest possible repeatable accuracy
  • Subject to licence
  • *Disclaimers for correction signals.

    Please note that some variants are not available in every country. Please contact your distributor for further information.

    EGNOS is a service available free of charge in Europe. WAAS is a comparable service for North America. Please note that both systems may produce a shift in track lines over time (satellite drift). These systems are not suitable for use in machine fleets (e.g. combine harvesting), or drilling operations.

    The accuracy data given relates to the accuracy of the GPS receiver on the machine under perfect conditions. All data are expressed as maximum values. A distinction is made between pass-to-pass accuracy and absolute accuracy. Pass-to-pass accuracy defines the accuracy of the subsequent pass in 95% of cases within 15 min of the reference track. Absolute accuracy defines at what level of accuracy a certain position can be found at a later time. The actual accuracy of the overall system can deviate from the abovementioned accuracy data. It depends on various influential factors such as vehicle factors (wheelbase, ballasting, calibration, etc.), attached implements (drift, configuration, attached front implements, etc.), and field and soil conditions.

    The pricing of the individual services depends upon the region and the provider.

    In the case of correction data services transmitted via mobile phone networks, availability is dependent on the coverage of the network provider used.

    CLAAS assumes no liability for circumstances or events beyond its control. These may include, for example, disturbances in the atmosphere/troposphere/ionosphere, breakdowns/disruptions to and/or insufficient availability and shutdowns of satellites within global navigation satellite systems (GPS, GLONASS, GALILEO) and their ground reference stations or of satellites belonging to correction service providers (EGNOS, OMNISTAR, etc.).

    E-DIF is patented correction algorithm which uses only standard GPS satellites to calculate a correction factor. E-DIF is therefore available worldwide as an alternative correction system in the basic accuracy segment and, within a few minutes, its accuracy is comparable with that of SBAS services (EGNOS, WAAS, etc.) for pass-to-pass applications. Therefore E-DIF should only be used for pass-to-pass tracking. E-DIF is completely unsuitable for driving in blocks or for use in controlled traffic applications or machine fleets (e.g. combine harvesting). It is also impossible to record points for absolute positioning. Shifts in tracks (satellite drift) due to long interruptions in work can be corrected using an update function (setting a reference point).