A TSVD-NCS Algorithm in Range-Doppler Domain for Geosynchronous Synthetic Aperture Radar

A TSVD-NCS Algorithm in Range-Doppler Domain for Geosynchronous Synthetic Aperture Radar
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地球同步合成孔径雷达距离-多普勒域TSVD-NCS算法

DOI:
10.1109/lgrs.2016.2599224
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发表时间:
2016-09
影响因子:
4.8
通讯作者:
Dai, Chao
Dai, Chao
中科院分区:
工程技术2区
文献类型:
--
作者:
Li, Zhenyu;Zhang, Qingjun;Liu, Liping;Dai, Chao

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地球同步轨道合成孔径雷达中超长的合成孔径时间和超大的成像场景会导致严重的二维空间变化。利用距离单元迁移均衡和修正的线性调频函数对距离变化进行了校正。研究了利用奇异值分解和方位非线性缩放进行方位变化校正的方法。所提出的成像算法的有效性进行了评估。在消除方位角变化和对1000孔径及150 km(方位角)× 130 km(距离)场景的点目标聚焦方面取得了满意的效果。
The ultralong synthetic aperture time and a very large scene cause severe 2-D spatial variation in geosynchronous synthetic aperture radar. The range variation was corrected using the range cell migration equalization and the modified chirp scaling function. The azimuth variation correction with the singular value decomposition and the azimuth nonlinear scaling was studied. The validity of the proposed imaging algorithm has been assessed. Satisfactory results were obtained in the removal of the azimuth variation, and the focusing of point targets from a synthetic aperture up to 1000 sand a scene of 150 km (azimuth) × 130 km (range).
斜视模式和椭圆轨道地球同步SAR雷达参数设计
DOI: 10.1109/jstars.2016.2570231
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