GPS technology in the Soil and Water Conservation

    4.2 full-featured, easy to operate. GPS measurements can be determined simultaneously measuring point location and elevation plane, using real-time dynamic measurements for construction stakeout; GPS measurement of the high degree of automation, the operator only when placed in the observation and the opening and closing equipment, surveillance equipment in working condition and meteorological data acquisition environment, while others, such as acquisition, tracking and recording observations of satellite observations and other measurements by the instrument automatically; with GPS receivers continue to improve, increasing degree of automation, and some had reached "a fool of "The extent of product off the receiver smaller and more light weight, greatly reducing the water tension in the work of security workers and labor intensity, the field work to become relaxed and happy.

    4.3 The global, all-weather operations. Reasonable distribution of the GPS satellites, to provide users with continuous, real-time three-dimensional position, three-dimensional velocity and time, any place on Earth, any time continuous synchronization observed more than four satellites, and no points between the inter-station perspective, point position can be required to thin dense, so a flexible choice of site work, save a lot of manufacturing standard costs, not covered by the cloudy night, fog wind, rain snow and other climate, may at any time GPS measurements.