Multichannel Staggered SAR Azimuth Processing
| Autor: | Gerhard Krieger, Marwan Younis, Felipe Queiroz de Almeida, Alberto Moreira |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Synthetic aperture radar
Beamforming Pulse repetition frequency 020301 aerospace & aeronautics Radar Computer science 0211 other engineering and technologies Context (language use) 02 engineering and technology Spaceborne radar High resolution wide swath Azimuth Radar imaging 0203 mechanical engineering Digital beamforming General Earth and Planetary Sciences Electrical and Electronic Engineering Image resolution 021101 geological & geomatics engineering Remote sensing Radarkonzepte |
| Popis: | State-of-the-art and future spaceborne SAR systems increasingly often face the requirement of providing high-resolution images with reduced revisit times, requiring coverage of wide swaths. Since these are contradicting drivers in terms of system design, different alternatives for High-Resolution Wide Swath (HRWS) SAR imaging have been investigated, relying on digital beamforming (DBF) and the use of multiple receiver channels, both in elevation and azimuth dimensions. In this context, Staggered SAR, which operates with a pulse repetition frequency variation, using a single channel in azimuth proves itself as a promising alternative for covering wide continuous swaths with moderate azimuth resolution, whereas the use of multiple azimuth receiver channels bears the potential of improving the azimuth resolution over a given swath, but has yet only been applied to systems with a fixed pulse repetition frequency. This paper introduces and analyzes in detail processing techniques suitable for the combination of these techniques, leading to novel multichannel Staggered SAR imaging modes with the potential for very fine azimuth resolution over ultra-wide swaths. A system concept with 2.0 m azimuth resolution over a 400 km swath in quad-pol is provided as an example. |
| Databáze: | OpenAIRE |
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