Traditional Culture Encyclopedia - Weather inquiry - Structure of weather radar

Structure of weather radar

Weather radar consists of the following basic parts: transmitter-generating high-frequency pulse, directional antenna-transmitting detection pulse and receiving echo pulse, pressing receiver-amplifying echo pulse signal, and display-showing the position, echo intensity and structure of meteorological targets (such as precipitation area and storm) relative to radar. There are three kinds of displays commonly used in weather radar: ① Distance display (A display or A/R display). An instrument that displays the echo intensity of meteorological targets at different distances. ② Plane position indicator (PPI). The radar station is used as the display center, and the plan of the azimuth and distance of meteorological targets is displayed in polar coordinates. It can reflect the horizontal distribution of precipitation area and rainstorm. ③ Distance Height Display (RHI). An indicating instrument that displays the distance and height of a meteorological target on a vertical plane, and displays a given direction in the form of rectangular coordinates. It can reflect the vertical structure of precipitation area and storm. After the 1970s, the weather radar used for quantitative detection was also equipped with a digital processing system of a small computer.