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- MULTIPLE-SWATH STRIPMAP SAR IMAGING

机译:-多幅条带状SAR成像

摘要

The present invention relates to a Synthetic Aperture Radar (SAR) imaging method, in which the method is in a stripmap mode of regions of the earth surface by a synthetic aperture radar transported by an air or satellite platform. And the process of performing N SAR acquisitions of, wherein the composite aperture radar comprises a single, non-separated antenna and a single receiver combined with the single, non-separated antenna, where N is an integer greater than 1. Each SAR acquisition in the stripmap mode is performed using each squint angle with respect to the flight direction of the composite aperture radar, and each of the declinations is used to perform other N-1 SAR acquisitions in the stripmap mode. It is the same or different from the declining angles. Each SAR acquisition in the stripmap mode is performed using each elevation angle for the nadir of the composite aperture radar, and each elevation angle is different in the stripmap mode. It is different from the elevation angles used to perform N-1 SAR acquisitions, and therefore, each SAR acquisition in the stripmap mode is different from the swaths observed through other N-1 SAR acquisitions in the stripmap mode. The result is related to the sworth of the surface. Each performed SAR acquisition in the stripmap mode is time interleaved individually or collectively with the radar transmission and reception operations of a single or group, and other N-1 SAR acquisitions in the performed stripmap mode. ), each radar transmission and reception operation performs transmission and reception of each radar beam in each acquisition direction defined by each elevation angle and each squint angle used for obtaining the SAR in the stripmap mode. And, by doing so, the respective acquisition directions are parallel to each other, resulting in a result that is not parallel to other N-1 SAR acquisitions in the performed stripmap mode. The method further includes generating SAR images of regions of a specific swath observed through the SAR acquisition in the stripmap mode, based on N SAR acquisitions in the performed stripmap mode. All generated SAR images are equal to half of the physical or equivalent length in the azimuth direction of a single, non-separated antenna and have one azimuth resolution.
机译:合成孔径雷达(SAR)成像方法技术领域本发明涉及一种合成孔径雷达(SAR)成像方法,其中该方法通过空中或卫星平台运输的合成孔径雷达处于地表区域的带状图模式。以及执行N次SAR捕获的过程,其中,复合孔径雷达包括单个不分离的天线和与单个不分离的天线组合的单个接收器,其中N是大于1的整数。使用相对于合成孔径雷达的飞行方向的每个斜视角度执行带状图模式,并且每个带偏角用于在带状图模式中执行其他N-1 SAR采集。它与倾斜角度相同或不同。使用复合孔径雷达最低点的每个仰角执行带状图模式下的每个SAR捕获,并且在带状图模式下每个仰角都不同。它与用于执行N-1 SAR采集的仰角不同,因此,带状图模式下的每个SAR采集都不同于通过带状图模式下的其他N-1 SAR采集所观察到的条带。结果与表面的光泽度有关。在条带模式下执行的每个SAR捕获分别与单个或一组的雷达发送和接收操作以及在执行的条带模式下进行的其他N-1个SAR捕获分别地或共同地进行时间交织。 ),每个雷达发送和接收操作在带状图模式下,在用于获取SAR的每个仰角和每个斜视角定义的每个采集方向上执行每个雷达波束的发送和接收。并且,通过这样做,各个获取方向彼此平行,从而导致结果与执行的带状图模式下的其他N-1 SAR获取不平行。该方法进一步包括基于在执行的条带映射模式下的N次SAR获取,生成通过条带映射模式下的SAR获取所观察到的特定条带区域的SAR图像。所有生成的SAR图像等于单个未分离天线在方位角方向上物理长度或等效长度的一半,并具有一个方位角分辨率。

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