Forward multiple-base line interference type synthetic aperture microwave radiometer and its design method

A technology of microwave radiometer and synthetic aperture, which is applied in the field of remote sensing measurement, can solve the problems that SSR cannot observe the earth, and the number of two-dimensional imaging antenna units and correlators is large, so as to reduce the number of antenna units, reduce the number of baselines, and overcome the problem of measurement The effect of the restriction
CN1163761CInactive Publication Date: 2004-08-25NAT SPACE SCI CENT CAS
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NAT SPACE SCI CENT CAS
Publication Date
2004-08-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The design method of interference type synthetic aperture microwave radiometer solves the problem of two many antenna units and correlators required when ESTAR is used in 2-D imaging and the problem of SSR incapable of being used in earth observation. The sparse antenna array is constituted in different modes, including oscillation scan imaging, phase controlled array oscillating scan imaging and 2-D synthetic aperture imaging. Spatial frequency variance caused by gimbel in forward direction is utilized for spatial frequency conversing and visibility function sampling, and this reduces the number of physical radixes and antenna units required in this direction and is favorable to space application.
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Description

technical field

[0001] The invention relates to remote sensing measurement technology, in particular to a comprehensive aperture microwave radiometer. Background technique

[0002] The usual passive microwave remote sensing measurement method is to directly measure the radiant brightness temperature of ground objects. But the antenna aperture used for direct measurement must be a real antenna aperture, such as a reflector antenna or an array antenna that can generate a real narrow beam. Since the beam width of the antenna (corresponding to the ground resolution) is inversely proportional to the physical aperture of the antenna (the diameter of the antenna aperture), and proportional to the working wavelength of the antenna, in order to improve the spatial resolution of remote sensing images, the working wavelength (frequency) Timing comes at the expense of increasing the physical aperture of the antenna. For example, for a real aperture radiometer operating in the L-band (...

Claims

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