An improved data separation approach for wide swath spaceborne SAR in multiple elevation beams operation mode

Fan Feng; Zikai Du; Rongrong He; Ruohan Hou; Lei Guo

doi:10.1117/12.2614959

15 February 2022 An improved data separation approach for wide swath spaceborne SAR in multiple elevation beams operation mode

Fan Feng, Zikai Du, Rongrong He, Ruohan Hou, Lei Guo

Author Affiliations +

Proceedings Volume 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021); 121662D (2022) https://doi.org/10.1117/12.2614959
Event: Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 2021, Hong Kong, Hong Kong

Abstract

Multiple elevation beams (MEBs) mode is a new kind of operation mode for high-resolution wide-swath spaceborne synthetic aperture radar (SAR) imaging. This mode uses a single wide transmit beam to cover the whole swath in range dimension; while on receive it forms multiple narrow scanning beams with high gain to receive echoes from multiple subswaths simultaneously. Thus, one of the key techniques associated with this mode is to extract data of each subswath from the received overlapping echoes. To deal with this issue, this paper brings forward an improved two-step data separation approach which combines the peak forming of antenna beam pattern onboard and nulls forming on ground. This approach has the advantages in the following three aspects. First, it can guarantee that echoes of each subswath will be received with optimal antenna gain without any loss; second, it can accommodate the effect of beam mispointing due to the error in the digital elevation model (DEM) and thus has good robustness in nulls-forming; last, it transfers part of the beam-forming process from space segment to ground segment so as to reduce the processing complexity on satellite, thereby improving its feasibility as well as precision.

Citation Download Citation

Fan Feng, Zikai Du, Rongrong He, Ruohan Hou, and Lei Guo "An improved data separation approach for wide swath spaceborne SAR in multiple elevation beams operation mode", Proc. SPIE 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 121662D (15 February 2022); https://doi.org/10.1117/12.2614959

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KEYWORDS

Finite impulse response filters

Synthetic aperture radar

Krypton

Optical filters

Antennas

Satellites

Electronic filtering

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