From 2010 the Global Navigation Satellite System (GNSS) and Regional Navigation Satellite Systems (RNSS) era began, with the finalisation of the GLONASS constellation (Russia) and the launch of satellites from Japan and India. The COMPASS (China) RNSS is due to be deployed in 2012, with the Galileo European Union GNSS due in 2014 and the COMPASS (China) GNSS in 2020. Professor Andrew Dempster talks about his latest research to design a ‘system of systems’ receiver that will be able to communicate with this rapidly expanding number of positioning satellites.