Satellite-borne multi-band one-dimensional synthetic aperture one-dimensional real aperture microwave radiation detection method

Abstract

The invention provides a satellite-borne multi-band one-dimensional synthetic aperture one-dimensional real aperture microwave radiation detection method. According to the method, a microwave radiation detection technology is adopted; by means of a parabolic cylindrical antenna reflecting surface, real aperture radiation detection in an along-orbit direction is realized, and synthetic aperture detection is realized in a cross-orbit direction; cross-orbit electrical scanning is realized by means of array beam synthesis, and along-orbit scanning is realized through satellite motion; the mechanical scanning of a large-diameter antenna is realized on the basis of the cross-orbit electrical scanning and the along-orbit scanning; and therefore, the problem of difficulty in compensating dynamic unbalance amount can be solved, and the service lives of instruments are prolonged. The method can avoid the mechanical scanning of the large-diameter antenna compared with a traditional two-dimensional real-aperture radiation detection technology and can assist in greatly reducing the number of array elements compared with a traditional two-dimensional synthetic aperture radiation detection technology, thereby realizing the optimal compromise of the radiation detection technology of the large-diameter antenna.

Description

technical field [0001] The invention relates to a space-borne multi-band one-dimensional comprehensive aperture one-dimensional real aperture microwave radiation detection method. Background technique [0002] Microwave radiation measurement technology is a high-sensitivity receiving device used to measure microwave thermal radiation of objects. Through the thermal radiation data of different frequency bands and different polarizations, the target temperature, humidity, precipitation, cloud liquid water content, cloud water phase state, land surface temperature, soil moisture, sea ice and coverage, snow depth and snow can be retrieved. water content etc. It is widely used in the fields of meteorology, ocean, land resources, environment, astronomical observation and deep space exploration. It can be seen from the development status of foreign countries that the development trend of spaceborne microwave radiometers is: 1) to the direction of multi-band and multi-polarization...

AI Technical Summary

Problems solved by technology

The biggest difficulty brought about by the increase of the antenna aperture is that the mechanical scanning of the large-aperture antenna is difficult to realize. The two-dimensional synthetic aperture radiation detection can avoid this difficulty, but the new problem is that the number of array elements is very large. The number of units is as high as hundreds, and the number of correlations is as high as 100,000, so it is impossible to realize multi-band and multi-polarization integrated detection

Images