Spirent used a multi-GNSS simulator, Spirent GSS6700, to generate GPS, GLONASS and BeiDou signals. It also used a technique known as live sky capture and playback and the Spirent GSS6425 Record and Playback system to sample real signals collected using a regular satellite navigation system antenna. The demonstration was showcased during ION GNSS+ 2013 in Tennessee, US. It was one of the first demonstrations in the US to include the full constellation of simulated BeiDou satellites tracking with a multi-GNSS receiver. Spirent has digitally stored the two demonstrations so that they can be replayed repeatedly.