The district has 34 rain gauge stations. When he came across mention of a rain gauge, King Yeongjo ordered a reproduction. Siphon barometers should not be confused with a siphon rain gauge. There are 34 rain gauge stations in Bijapur District. In Hearne, water rose above every rain gauge. Weather radar estimates can be used outright, or corrected for rain gauge observations. AccuWeather's definition is based on the probability at the forecast area's official rain gauge. For example, an acoustic rain gauge is described by Nystuen. Rain gauge amounts are read either manually or by automatic weather station (AWS). The evidence for this drought is also primarily in tree-ring, rather than rain gauge, data. In 1662, Sir Christopher Wren invented the mechanical, self-emptying, tipping bucket rain gauge. In 1441, King Sejong's son, Prince Munjong of Korea, invented the first standardized rain gauge. In 1441, king PUBG Sejong's son, Prince PUBG Munjong, invented the first standardized rain gauge.