CLAS / RTK Solutions

RTK turns a GNSS receiver into a measurement instrument: centimeter-level accuracy in both horizontal and vertical position, instead of the two to three meters a standalone receiver gives you.

It needs two things: a receiver on the moving object, and a correction source — your own base station on site, or an NTRIP service. Navisys builds both ends, from embedded modules to portable base and rover sets you can carry into the field.

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How RTK works
Base Rover RTCM corrections

Base and rover

The base sits on a known point and measures the error in the satellite signal. It sends that correction to the rover, which applies it and reports centimeter-level position.

No base on site? Use NTRIP

Where a public or commercial network exists, corrections arrive over the internet instead and you only need the rover. Navisys also runs a free NTRIP caster you can use for testing.

A second antenna adds heading

With two antennas the receiver also reports true heading, which stays stable near motors and steel structures where a compass drifts.

GR-90X comparison table

Interface, battery, base or rover, and app support across the GR-90X series, side by side.

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Products

No products match that use. Show all products, or tell us what you need.

Not sure which RTK setup fits?

Tell us the platform, the accuracy you need and where corrections will come from.

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