Synthetic Aperture Radar for Helicopter Landing in Degraded Visual Environments
Technical Report,01 May 2018,31 Aug 2018
US Army Research Laboratory Adelphi United States
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This report analyzes the forward-looking synthetic aperture radar SAR system for helicopter landing assistance in degraded visual environments, currently under design at the US Army Research Laboratory. The main focus of the investigation is on SAR imaging and antenna array processing techniques. In particular, the systems point spread function is analyzed in detail by quantifying the main performance metrics resolution, sidelobes, and grating lobes. Analytic and numeric results are illustrated with 3-D graphics. Tradeoffs and performance improvement methods are discussed. Additionally, we review several options for antenna array design and undertake a sensitivity study of the 3-D SAR image quality with respect to platform positioning errors. A design case study is presented as well, emphasizing aspects such as radar waveforms, timing, and power requirements.
- Active and Passive Radar Detection and Equipment