GPS-RTK2 accuracy with two devices (base-rover)

GPS/GNSS Development Boards
1

I make no claim to understand all the maths that go into producing highly accurate GPS fixes, but I’m curious if the centimetre accuracy of the GPS-RTK2 can be achieved if it’s in a system that uses two units (one base station and one rover).

The accuracy of the fix the GPS-RTK2 can get when surveying in is only around 1.5m, so does that mean the accuracy of the rover is limited to this 1.5m? My assumption is that relative accuracy of the rovers position is still going to be on the order of centimetres, but the absolute accuracy is limited to the 1.5 metres of the base stations fix?

Thanks!

2

Hi Jon.

It’s the combination of one GPS-RTK2 along with data from a second GPS-RTK2 or a nearby external correction source that gives the mm accuracy. On their own, 1.5m is good, but together it’s much better.

See the guides for the [NEO-M8P-2 and [ZED-F9P for details on using a correction source.](GPS-RTK2 Hookup Guide - SparkFun Learn)](GPS-RTK Hookup Guide - SparkFun Learn)