The GPS for the construction site is a satellite positioning system. GPS has since appeared, and has attracted many users with its high accuracy, all -weather, global coverage, and convenient and flexible. GPS is not only the patron saint of cars, but also a wisdom star managed by the logistics industry. With the rapid development of the logistics industry, GPS has a pivotal role and has become the second largest consumer group after the automotive market. GPS is the development of the United States since the 1970s. It lasted 20 years and cost $ 20 billion. It was fully completed in 1994. And positioning system. Pucting principle: 1, pseudo -distance measurement and pseudo -distance single -point positioning pseudo -distance measurement is to determine the distance from the satellite to the receiver, that is, the satellite -emitted satellite signal to the GPS receiver The propagation time is multiplied by the distance from the speed of light. The single point positioning of the pseudo-distance method is to use the GPS receiver to determine the pseudo-distance distance with more than 4 GPS satellites at a moment, and the instantaneous instantaneous coordinates of the satellite obtained from satellite navigation. 3D coordinates in the coordinate system. 2, carrier phase measurement and carrier phase positioning Themovarial phase measurement is to determine the phase delay from the GPS satellite carrier signal to the receiver antenna. The GPS satellite carriers are prepared on the ranging code and navigation electrical texts. After receiving the satellite signal, the ranging code and satellite electrical text on the carrier are first removed, and the carrier is re -obtained. The GPS receiver will obtain the phase difference between the satellite reconstruction carrier and the vibration signal generated by the oscillator through the phase meter. 3, real -time differential positioning GPS real -time differential positioning principle is to place GPS receiving machines (referred to as the benchmark stations) on existing accurate heart coordinate points, and use the known ground -hearted coordinates and Star Calendar calculations The correction value of the GPS observation value is sent to the GPS receiver (called a mobile station) in the motion through radio communication equipment (called data chain). This stations use the correctional value to correct your GPS observation value to eliminate the above errors, thereby improving real -time positioning accuracy. There are many types of GPS dynamic differential methods, including position differences, pseudo -distance differences (RTD), carrier phase real -time difference (RTK), and wide -area differences.
1. The GPS for the construction site is a satellite positioning system. Didn't the Planning Bureau provide you with a few coordinate points? They will use this instrument to locate the point. 2, your construction unit is positioned according to the coordinates of these points, such as where is the specific location of the house and so on.
GPS is a satellite positioning system. The specific coordinate point is located by the surveying and mapping home. The red line before construction is drawn by GPS positioning. In the future, the building positioning is also completed by GPS positioning. To put it bluntly, it is the instrument used by the positioning point of a project to a project.
Coordinate control point
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