Gran Stal’s knowledge and experience in the GNSS industry ensures that the GSD400 offers you the highest possible accuracy, scaleable to a centimeter. The GSD400 GNSS receiver using the GPS dual-band, Beidou dual-band, two systems for joint positioning, with ultra-long distance RTK solution engine, adapt to harsher, long distance environment. Intelligent dynamic sensitivity signal tracking technology & highly reliable carrier tracking technology, greatly improving the carrier accuracy, to provide users with high-quality original observations. It supports current and planned signals as they become available – guaranteeing you reliable and accurate GNSS positioning now and into the future.