Active phased array weather radar system based on full-digital array

Abstract

The invention relates to an active phased array weather radar system based on a full-digital array. The system comprises a signal processing machine which is used for emitting a wave beam, receiving the wave beam and processing echo data; the signal processing machine is in bidirectional communication with a monitoring terminal and a product terminal through network; the signal processing machine is connected with a first high-speed large-capacity wavelength division multiplexing optical fiber communication machine through first optical fibers; the first high-speed large-capacity wavelength division multiplexing optical fiber communication machine is connected with a second high-speed large-capacity wavelength division multiplexing optical fiber communication machine through second optical fibers; a collector ring sleeves the second optical fibers; the second high-speed large-capacity wavelength division multiplexing optical fiber communication machine is in bidirectional communication with a correcting branch and a full-digital array module; the full-digital array module is connected with an antenna array through a correction network. According to the system, a distributive receiving-transmitting assembly is adopted to improve the working reliability of a radar; the electric scanning is performed for the wave beam, so that the flexibility and variation are ensured, a plurality of wave beams can be received at the same time, and the scanning is fast; the system can work in a plurality of working modes, and the temporal-spatial resolution is high.

Description

Technical field [0001] The invention relates to the technical field of phased array weather radars, in particular to an active phased array weather radar system based on a fully digital array. Background technique [0002] Weather radar occupies a very important position in the various ways that people detect the earth’s atmosphere on which they live. Compared with other detection methods, weather radar has high temporal and spatial resolution and can detect disastrous weather in a timely and accurate manner. In particular, it is a very effective observation tool for small and medium-scale disastrous weather monitoring and short-term weather forecasting. [0003] The new generation of weather radars currently deployed in my country have greatly improved the monitoring and early warning capabilities of disastrous weather. It can quantitatively detect rainfall echo intensity, radial velocity, velocity spectrum width and other information, with its high temporal and spatial resolution...

AI Technical Summary

Problems solved by technology

However, due to the rapid change of convective weather phenomena, the development time scale of convective cells sometimes ranges from a few minutes to more than ten minutes. Especially for strong convective cells such as storms, the situation of a single cell may change greatly in a few minutes

At present, the Doppler weather radar still needs to be improved to realize the effective observation of small-scale, short-duration and fast-changing weather phenomena that cause great harm. The main reason is that the radar detection period is long and the radar detection time resolution is low.

[0004] The current phased array weather radar research in my country is still in its infancy

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