New GRS-1 from Topcon Positioning System is a fully integrated, dual-constellation, network-enabled RTK rover system. Complete in a single handheld GNSS receiver and field controller, the unit includes a high-speed processor, increased memory, camera, compass, and bar code reading device. Designed as a GPS network rover receiver, it has DGPS capability with an internal L1 antenna for GIS and navigation. External PGA-1 antenna connects to local GNSS network via internal modem.