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Conceptual design of near-space synthetic aperture radar for high-resolution and wide-swath imaging

机译:近空间合成孔径雷达的高分辨率和广域成像概念设计

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Airborne synthetic aperture radar (SAR) has the capability of high-resolution, and spaceborne SAR has the capability of wide-swath. Inspired by recent advances in near-space defined as the region between 20 km and 100 km, this paper conceptually designed near-space vehicle-borne SAR. The near-space vehicle-borne SAR has the synthetical advantages of the satellite and airplane platforms. By placing SAR transmitter or receiver in near-space vehicles, many functions that are currently performed with satellites or airplanes could be performed in low cost way. These advantages make simultaneous high-resolution and wide-swath SAR imaging possible. As such, this paper focuses on the role of near-space vehicle for high-resolution and wide-swath SAR imaging, and deals with conceptual performance, as opposed to technological implementation. The concepts, models and processing algorithms are provided. To further suppress the azimuth ambiguities and extend swath width, multiple beams in azimuth is applied. Furthermore, an example near-space vehicle-borne SAR is designed. It is shown that the use of cost effective near-space vehicles can provide the solutions that were previously thought to be out of reach for remote sensing scientists and customers.
机译:机载合成孔径雷达(SAR)具有高分辨率的能力,而星载SAR具有宽范围的能力。受近空间定义为20 km至100 km的近空间最新进展的启发,本文从概念上设计了近空间车载SAR。近空间车载SAR具有卫星和飞机平台的综合优势。通过将SAR发射器或接收器放置在近太空飞行器中,可以用低成本的方式来执行当前用卫星或飞机执行的许多功能。这些优点使同时进行高分辨率和广范围的SAR成像成为可能。因此,本文重点关注近空间飞行器在高分辨率和广域SAR成像中的作用,并处理概念性能,而不是技术实施。提供了概念,模型和处理算法。为了进一步抑制方位角模糊度并扩展条幅宽度,应用了多个方位角波束。此外,设计了一个示例近空车载SAR。结果表明,使用具有成本效益的近太空飞行器可以提供以前认为对遥感科学家和客户来说遥不可及的解决方案。

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