High-accuracy data collection has come a long way since the USA launched the first GNSS constellation, GPS, in the 1970s. Today, all you need to get started with submeter or centimeter data collection is a smart device, a collection app, and a GNSS receiver that works with both.
How can you get GPS sub-meter corrections for free? SBAS around the world provide free sub-meter corrections in real-time for high-performance GNSS receiver. In this article from the Eos January 2017 issue, we'll teach you everything you need to know to get started.