39 results about "Precipitation measurement" patented technology

The application provides a radar precipitation measurement method and device based on a 45-degree slant depolarization ratio, which uses a radar with or modified to realize 45-degree slant polarization to collect single-shot double-receiving two-channel complex voltage data, calculates a slant baseline linear depolarization ratio and a reflectivity factor Z; identifies a melting layer according to a vertical pointing profile observation collected by the radar in a vertical pointing mode, and applies upper and lower boundaries of the melting layer to a near-horizontal scanning mode to realize liquid rainfall identification; performs rain attenuation correction on and Z, and according to the rain attenuation corrected and Z, looks up a table or a neural network to inverse precipitation parameters such as rainfall intensity, mass-weighted mean diameter, normalized intercept, number concentration and water content. The application improves the precision and robustness of precipitation measurement.

The utility model provides an intelligent weighing type rainfall gauge, and belongs to the technical field of precipitation measurement. The problem that the rainfall intensity and the rainfall time period cannot be measured at the same time by a traditional rainfall meter is solved; according to the technical scheme, the weighing type rainfall sensor comprises a weighing type rainfall sensor body, the weighing type rainfall sensor body comprises a shell, the top of the shell is provided with a water bearing device, the shell is internally provided with a water measuring device, the water measuring device is communicated with the water bearing device through a water inlet pipe, the water inlet pipe is provided with a water stopping valve, and the bottom of the water measuring device is communicated with the outside through a water outlet pipe. A water stop valve is installed on the water outlet pipe, a water drain valve is installed on the water outlet pipe, a high-precision pressure sensor is installed at the bottom of the water meter, a control circuit board is further installed in the shell, the control circuit board is connected with the control ends of the water stop valve and the water drain valve through wires, and the control circuit board is further connected with the high-precision pressure sensor through a wire. The precipitation measuring device is applied to precipitation measurement.

The invention relates to a Ku / Ka dual-band space radiometric calibration method for a satellite-borne rainfall measurement radar, and the method specifically comprises the steps: S1, carrying out the radiometric calibration of the satellite-borne rainfall measurement radar through a space radiometric calibrator, obtaining a corresponding relation between a radar working parameter and a radiation measurement error, and constructing a satellite-borne rainfall measurement radar radiation measurement error database; s2, training and learning the neural network through the satellite-borne rainfall measurement radar radiation measurement error database, and generating a satellite-borne rainfall measurement radar radiation measurement error estimation model; and S3, obtaining radar working parameters of the spaceborne rainfall measurement radar, performing radiation measurement error estimation of the spaceborne rainfall measurement radar through the spaceborne rainfall measurement radar radiation measurement error estimation model, and performing radiation error compensation according to a radiation measurement error estimation result. According to the invention, the calibration precision of the spaceborne rainfall measurement radar is effectively improved, and the rainfall inversion precision is further improved.