Your Construction Technology Provider

Your GNSS operations are only as good as your correction source

It’s important, so we let you choose the right one for you. Larger sites may need a local GNSS base station for the highest precision. Smaller sites may opt for a virtual correction source.

GNSS correction sources are available on-site in a variety of ways, depending on what you need for your job site. Choose to run a local base station on-site, obtain corrections from a local VRS Now network service or even obtain corrections from the satellite-delivered CenterPoint RTX correction service.

Features & Benefits

GNSS alone does not give the high level of accuracy needed on a construction site. The accuracy and integrity of GNSS can be greatly enhanced by using a GNSS correction service. GNSS correction sources take many forms, but all provide information that improves GPS/GNSS performance and precision.

  • Single Base RTK – RTK Base, Internet Base Station Service (IBSS)
  • Mobile Satellite Services or MSS – RTX, OmniSTAR
  • Network RTK – VRS Now or VRS
  • Differential GNSS (DGNSS) – DGNSS Base, MSK Beacon, IBSS
  • Satellite Based Augmentation Systems (SBAS)

Options available


For larger construction sites and those that include both site positioning and machine control operations, we recommend you deploy the Trimble SPS855 GNSS Modular Receiver as a permanent or semi-permanent base station.

Trimble VRS

Trimble VRS is a Network  Real-Time Kinematic (RTK) subscription service delivered via the Internet over a cellular network. VRS is ideal for construction sites where it is not practical to set up a base station. VRS does require an Internet connection at the rover.


Trimble xFill runs seamlessly in the background, automatically bridging the gap if a user’s RTK or VRS correction source is interrupted due to cellular signal disruption. Trimble xFill is a satellite-delivered service that will maintain RTK precision for five minutes after the loss of an RTK correction stream.

Centrepoint RTX

Built on Trimble’s exclusive RTX technology, Trimble CenterPoint RTX provides high-accuracy GNSS positioning services via satellite or cellular delivery worldwide. It’s ideal for jobs requiring the highest accuracy.


Trimble Beacon Software provides a configurable architecture for deploying DGNSS navigation infrastructure to deliver high availability broadcast services for maritime harbor and harbor approach or inland navigation applications. 

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