Space-based rain radar target positioning and three-dimensional processing method and system of rainfall information
A radar target and processing method technology, applied in the field of meteorological satellite data processing, can solve problems such as the inability to establish the Doppler equation of motion, the inability to establish the earth ellipsoid model, etc., achieve efficient processing and display, improve measurement capabilities, and improve prediction accuracy rate effect
Active Publication Date: 2022-07-29
SHANGHAI SATELLITE ENG INST
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However, the space-based rain-measuring radar does not adopt the synthetic aperture radar system, and the Doppler motion equation cannot be established, and the rain-measuring radar does not observe the surface, nor can it establish the earth ellipsoid model
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[0094] The invention relates to data processing of spaceborne rain measuring radar, in particular to an accurate and efficient space-based rain measuring radar target positioning and three-dimensional processing method and technology of rainfall information. With the continuous development of meteorological satellite technology, it is not only required to obtain more abundant detection elements to further improve the accuracy of the weather forecast, but also to obtain the evaluation information of the actual rainfall and other weather conditions to correct the forecast model. Therefore, the use of radar space remote sensing technology can make up for the shortcomings of optical remote sensing, infrared remote sensing and passive microwave remote sensing, and realize the quantitative measurement of rainfall characteristic parameters. Since the working mode of space-based precipitation radar is different from that of synthetic aperture radar, range-Doppler positioning algorithm ...
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The invention provides a method and system for locating a space-based rain radar target and three-dimensional processing of rainfall information. According to the working mode of the space-based rain measuring radar, an observation geometric model and a simultaneous equation set of motion relations; the WGS-84 coordinate system is used as a reference. , solve the positioning equation system to obtain the position information of the observation area under different slant distances; obtain the longitude, latitude and sea level information of the target through coordinate conversion; based on the target positioning result, establish a three-dimensional grid array, representing the longitude, latitude and sea level respectively. Plane height, each element value in the grid represents the radar echo power value corresponding to the latitude and longitude and sea level height; finally, the section processing is performed with the sea level height as the unit to realize the three-dimensional display of spatial rainfall information. The invention utilizes the penetrability of microwave signals and the vertical resolution capability of radar in radial distance to receive rainfall echoes of different heights, obtain accurate rainfall intensity and rainfall type and other information through inversion, thereby improving the space-based rainfall measurement capability.
Description
technical field [0001] The invention relates to the technical field of meteorological satellite data processing, in particular, to a method and system for locating a target of a space-based rain measuring radar and three-dimensional processing of rainfall information. Background technique [0002] Among meteorological satellite remote sensing technologies, optical and infrared remote sensing technologies have better resolution and interpretability, but are easily covered by clouds and rain, making it impossible to accurately measure rainfall intensity; passive microwave remote sensing has the characteristics of all-day and all-weather, but it is not suitable for Rainfall measurement has limitations and cannot be measured with high accuracy. [0003] Before the present invention, there is no space-based rain radar in my country, and meteorological radars are mainly concentrated on land and airborne platforms. The space-based rain radar is a new type of meteorological observat...
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IPC IPC(8): G01S13/95G01S19/42G01S19/52G01W1/00
CPCG01S13/955G01S13/958G01W1/00G01S19/42G01S19/52Y02A90/10
Inventor 陶满意张宏伟缪鹏飞顾亦磊肖前循王震秦冉冉
Owner SHANGHAI SATELLITE ENG INST