基于定标器相位梯度提取的圆迹SAR轨迹重建方法

郭振宇; 林赟; 洪文; 谭维贤; 王彦平

doi:10.11999/JEIT140950

基于定标器相位梯度提取的圆迹SAR轨迹重建方法

doi: 10.11999/JEIT140950

计量
- 文章访问数: 1413
- HTML全文浏览量: 169
- PDF下载量: 729
- 被引次数: 0
出版历程
- 收稿日期: 2014-07-17
- 修回日期: 2015-05-07
- 刊出日期: 2015-08-19

Circular SAR Trajectory Reconstruction Based on Phase Gradient of Calibrators

摘要

摘要: 圆迹合成孔径雷达(CSAR)高分辨率成像，对惯导系统的精度和稳定性提出了更高的要求，运动补偿技术是关键技术之一。该文首先分析了轨迹测量误差引起的相位误差，然后针对相位误差的空变性给出一种基于定标器相位梯度提取的圆迹SAR轨迹重建方法。该方法从SAR回波数据中提取定标器沿方位向的相位梯度，结合多个定标器的相位梯度，利用三边测量法重建高精度圆迹SAR轨迹，用于获取高质量的CSAR图像。该方法解决了轨迹测量误差引起的图像散焦问题，可实现整个场景的有效聚焦。仿真结果验证了该方法的正确性和有效性。
- 合成孔径雷达 /
- 圆迹合成孔径雷达 /
- 运动补偿 /
- 轨迹重建 /
- 相位梯度
Abstract: Circular SAR (CSAR) high resolution imaging requires a more accurate and stable Inertial Navigation System (INS), therefore motion compensation is one of the key technologies. In this paper, the phase error caused by trajectory measurement error is firstly analyzed. Then, the CSAR trajectory reconstruction algorithm based on the extraction of calibrators phase gradient is proposed. This algorithm is aiming at the spatial variant property of phase errors. The azimuth differential phase of each calibrator is extracted from SAR echo data. The high precision CSAR trajectory is reconstructed via trilateration in combination with multiple calibrators phase gradient. The high quality CSAR image is formed with this trajectory. The proposed algorithm solves the problem of image defocusing by trajectory measurement error, meanwhile the entire scene gets focused efficiently. The simulation results verify the correctness and effectiveness of the proposed algorithm.
- SAR /
- Circular SAR (CSAR) /
- Motion compensation /
- Trajectory reconstruction /
- Phase gradient

HTML全文

参考文献(17)

Soumekh M. Synthetic Aperture Radar Signal Processing[M]. New York, John Wiley Sons, 1999: 486-539.

Pinheiro M, Prats P, Scheiber R, et al.. Tomographic 3D reconstruction from airborne circular SAR[C]. IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2009), Cape Town, 2009, 3: III-21-III-24.

Demirci S, Yigit E, and Ozdemir C. Wide-field circular SAR imaging: 2D imaging results for simulation data[C]. 2013 6th International Conference on Recent Advances in Space Technologies (RAST), Istanbul, 2013: 421-424.

Frolind P, Gustavsson A, Lundberg M, et al.. Circular- aperture VHF-band synthetic aperture radar for detection of vehicles in forest concealment[J]. IEEE Transactions on Geoscience and Remote Sensing, 2012, 50(4): 1329-1339.

Frolind P, Ulander L M H, Gustavsson A, et al.. VHF/ UHF-band SAR imaging using circular tracks[C]. IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2012), Munich, 2012: 7409-7411.

Ponce O, Prats-Iraola P, Pinheiro M, et al.. Fully polarimetric high-resolution 3-D imaging with circular SAR at L-band[J]. IEEE Transactions on Geoscience and Remote Sensing, 2013, 52(6): 3074-3090.

洪文. 圆迹 SAR 成像技术研究进展[J]. 雷达学报, 2012, 1(2): 124-135.

Hong Wen. Progress in circular SAR imaging technique[J]. Journal of Radars, 2012, 1(2): 124-135.

林赟, 谭维贤, 洪文, 等. 圆迹 SAR 极坐标格式算法研究[J]. 电子与信息学报, 2010, 32(12): 2802-2807.

Lin Yun, Tan Wei-xian, Hong Wen, et al.. Polar format algorithm for circular synthetic aperture radar[J].Journal of Electronics Information Technology, 2010, 32(12): 2802-2807.

Lin Y, Hong W, Tan W, et al.. Airborne circular SAR imaging: Results at P-band[C]. 2012 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), Munich, 2012: 5594-5597.

Ponce O, Prats-Iraola P, Scheiber R, et al.. Analysis and optimization of multi-circular SAR for fully polarimetric holographic tomography over forested areas[C]. 2013 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), Melbourne, 2013: 2365-2368.

Ponce O, Prats-Iraola P, Scheiber R, et al.. Polarimetric 3-D reconstruction from multicircular SAR at P-band[J]. IEEE Geoscience and Remote Sensing Letters, 2014, 11(4): 803-807.

Ponce O, Prats P, Rodriguez-Cassola M, et al.. Processing of circular SAR trajectories with fast factorized back- projection[C]. 2011 IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2011), Vancouver, 2011: 3692-3695.

Poisson J B, Oriot H, and Tupin F. Performances analysis of moving target tracking in circular SAR[C]. 2013 14th International IEEE Radar Symposium(IRS), Dresden, Germany, 2013, 1: 531-536.

Cantalloube H and Koeniguer E C. Assessment of physical limitations of high resolution on targets at X-band from circular SAR experiments[C]. 7th European Conference on Synthetic Aperture Radar (EUSAR 2008), Friedrichshafen, 2008: 1-4.

Dungan K E and Nehrbass J W. Wide-area wide-angle SAR focusing[J]. IEEE Aerospace and Electronic Systems Magazine, 2014, 29(1): 21-28.

施引文献

资源附件(0)

访问统计