KeyNetGPS is an exciting business venture of Keystone Precision Solutions. KeyNetGPS is a series of continuously operating, high precision GNSS reference stations. These reference stations have all been linked together using Trimble VRS3Net App software, creating a Virtual Reference Station System (VRS). For a more detailed explanation of a Trimble Virtual Reference Station Network, see Product Summary below. KeyNetGPS markets subscriptions which provide real-time correction data to clients through the Internet. The realtime receiver or rover is linked to the Network using wireless Internet technology.