Wilkinson, Maxwell W.
McCaffrey, Ken J. W.
Jones, Richard R.
Roberts, Gerald P.
Holdsworth, Robert E.
Gregory, Laura C.
Walters, Richard J.
Wedmore, Luke
Goodall, Huw
Iezzi, Francesco
Article History
Received: 1 March 2017
Accepted: 22 May 2017
First Online: 4 July 2017
Competing Interests
: The low-cost GNSS units used in this research are developed by Geospatial Research Limited. Maxwell Wilkinson is an employee of Geospatial Research Limited, Richard Jones is the managing director, Ken McCaffrey and Robert Holdsworth are directors.