Automating your World: Getting the last millimetre with machine control

Welcome to the fourth Automating your World column, a series of advice articles by Aptella technical experts. In this series of articles, we look at the various aspects of machine control solutions. In the previous column, we looked at how single-antenna, twin-antenna and dual-mast GNSS (Global Navigation Satellite System – a generic term for all satellite positioning systems, including GPS)) grade control systems compared to each other and which application each was best suited for. GNSS-based 3D grade control systems have made a major impact on how heavy construction is done, but they still have limitations when it comes to achieving very tight vertical accuracies. This is true regardless of which brand you use. And, while triple-constellation (GPS,