A dual-band dual-polarization spaceborne cloud and rain measurement radar system

Abstract

The invention discloses a dual frequency band dual polarization spaceborne cloud-rain measurement radar system which is mainly composed of an antenna subsystem, a radio frequency subsystem, a digitalsubsystem, a monitoring subsystem and a power supply subsystem. The antenna subsystem adopts a parabolic reflector / microstrip reflective array antenna feeder system, and comprises a parabolic reflector / microstrip reflective array antenna, a Ka frequency band active phased array feed source, a W frequency band beam waveguide feed system and a Ka / W frequency band shared parabolic reflector / microstrip reflective array antenna. The radio frequency subsystem is connected with the Ka frequency band active phased array feed source, the W frequency band beam waveguide feed system and the digital subsystem. The digital subsystem is connected with a terminal. The system provided by the invention has the advantages that the three-dimensional vertical structure information of clouds and precipitationin the field of view can be quantitatively acquired; and the acquired global cloud-rain three-dimensional structure data can be applied to three-dimensional high-precision inversion of atmospheric clouds and precipitation, can be applied to global extreme weather monitoring and forecasting, and can be applied to atmospheric science and numerical simulation studies.

Description

technical field [0001] The invention relates to a radar, more specifically to a spaceborne weather detection radar. Background technique [0002] Since the first meteorological satellite was successfully launched, meteorological satellites have played an important role in global meteorological disaster monitoring and climate cognitive research and forecasting. At present, most meteorological satellites are still mainly equipped with passive remote sensing instruments. The Microwave Remote Sensing Imager SSM-I of the US Defense Meteorological Satellite (DMSP) has been in orbit for more than 11 years, monitoring global cloud and rain distribution and other related parameters. In Japan's ADEOS-II project, the retrieval of water vapor in the atmosphere, water content in clouds and precipitation by the microwave scanning radiometer AMSR is the key research target. The detection result of the passive remote sensing instrument is the integral effect in the direction of the beam, ...

AI Technical Summary

Problems solved by technology

The detection result of the passive remote sensing instrument is the integral effect in the direction of the beam, and the distribution information of cloud and rain particles on the beam path cannot be obtained

Although some people have used a multi-band microwave radiometer to invert the vertical distribution of water vapor in precipitation clouds, the results obtained can roughly reflect the main characteristics of the vertical structure of clouds and rain, but its vertical resolution is poor, and it is very difficult to improve its vertical resolution. This method cannot reach the measurement level of spaceborne cloud and rain radar

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