A new spaceborne wide swath sliding spotlight mode with a high squint angle

Xuhang Lu; Wei Xu; Pingping Huang; Weixian Tan; Yaolong Qi

doi:10.1117/12.2691285

1 August 2023 A new spaceborne wide swath sliding spotlight mode with a high squint angle

Xuhang Lu, Wei Xu, Pingping Huang, Weixian Tan, Yaolong Qi

Proceedings Volume 12752, Second International Conference on Optoelectronic Information and Computer Engineering (OICE 2023); 127520E (2023) https://doi.org/10.1117/12.2691285
Event: Second International Conference on Optoelectronic Information and Computer Engineering (OICE 2023), 2023, Hangzhou, China

Abstract

The spaceborne squint sliding spotlight mode provides the capacity to observe the Earth in high resolution with different angles. However, with the increased squint angle, the imaged swath is obviously reduced due to the large range cell migration. To extend the reduced swath, a new spaceborne wide swath sliding spotlight mode with a high squint angle is proposed in this paper. Besides azimuth beam steering to improve the azimuth resolution, antenna beam is also steered in elevation to improve the swath width. The imaging principle of the proposed imaging mode is described in detail, while its corresponding flowcharts of SAR system design and imaging processing are given. Furthermore, the beam steering law of the designed system example with azimuth resolution of 0.5m and swath width of 20km is given, while the imaging result of the designed scene with three targets is given. Both simulation results validate the proposed imaging mode in the high squint case.

Citation Download Citation

Xuhang Lu, Wei Xu, Pingping Huang, Weixian Tan, and Yaolong Qi "A new spaceborne wide swath sliding spotlight mode with a high squint angle", Proc. SPIE 12752, Second International Conference on Optoelectronic Information and Computer Engineering (OICE 2023), 127520E (1 August 2023); https://doi.org/10.1117/12.2691285

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