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Microwave radiometer using fanbeam inversion

机译：使用扇束反演的微波辐射计

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摘要

A microwave radiometer reconstructs images by fanbeam inversion. True time delay (100), frequency (600, 700) and mechanical scanning systems (200) are disclosed. The mechanically scanning radiometer includes a fanbeam antenna (210) to scan a scene so that the antenna output is a projection of the scene taken along the direction of scan. The mechanical scanning motion is provided by a rocking motor (254) controlled by a computer (214). Projections are obtained for successive orientations as the antenna is rotated by another motor (212). By application of an inverse Radon transform, the scene scanned is reconstructed by the computer.PPIn one frequency scanning system (600), a filter bank spectrometer is implemented to obtain the projections, and in the other frequency scanning system (700), a transform spectrometer implemented. In the delay scanning system (100), a beam forming computer is used in the reconstruction process. A modification of the Radon transform is disclosed which compensates for the conicity of electronically scanning fanbeams.

机译：微波辐射计通过扇形光束反演来重建图像。公开了真实时间延迟（100），频率（600、700）和机械扫描系统（200）。机械扫描辐射计包括用于扫描场景的扇形束天线（210），使得天线输出是沿扫描方向截取的场景的投影。机械扫描运动由计算机（214）控制的摇摆马达（254）提供。当天线被另一个电动机（212）旋转时，获得用于连续定向的投影。通过应用Radon逆变换，计算机可以重建扫描的场景。

在一个频率扫描系统（600）中，实现了一个滤波器组光谱仪来获取投影，而在另一个频率扫描系统中，（700），实现了变换光谱仪。在延迟扫描系统（100）中，在重建过程中使用波束形成计算机。公开了对Radon变换的修改，该修改补偿了电子扫描扇形光束的锥度。展开▼

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公开/公告号US4724439A

专利类型
公开/公告日1988-02-09

原文格式PDF
申请/专利权人 HUGHES AIRCRAFT COMPANY;
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申请/专利号US19870015543
发明设计人 CHARLES R. EDELSOHN;CARL A. WILEY;
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申请日1987-02-12
分类号G01S3/02;
国家 US
入库时间 2022-08-22 06:49:32

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