ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., IV-2/W4, 465-470, 2017
https://doi.org/10.5194/isprs-annals-IV-2-W4-465-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
 
14 Sep 2017
ERROR ESTIMATION AND UNAMBIGUOUS RECONSTRUCTION FOR CHINESE FIRST DUAL-CHANNEL SPACEBORNE SAR IMAGING
T. Jin1,2, X. Qiu2, D. Hu2, and C. Ding2 1University of Chinese Academy of Sciences, Beijing 100049, China
2Key Laboratory of Technology in Geospatial Information Processing and Application System, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China
Keywords: Synthetic aperture radar (SAR), high-resolution and wide-swath (HRWS), digital beamforming (DBF), orthogonal subspace method (OSM), unambiguous reconstruction Abstract. Multichannel synthetic aperture radar (SAR) is a significant breakthrough to the inherent limitation between high-resolution and wide-swath (HRWS) faced with conventional SAR. Error estimation and unambiguous reconstruction are two crucial techniques for obtaining high-quality imagery. This paper demonstrates the experimental results of the two techniques for Chinese first dualchannel spaceborne SAR imaging. The model of Chinese Gaofen-3 dual-channel mode is established and the mechanism of channel mismatches is first discussed. Particularly, we propose a digital beamforming (DBF) process composed of the subspace-based error estimation algorithm and the reconstruction algorithm before imaging. The results exhibit the effective suppression of azimuth ambiguities with the proposed DBF process, and indicate the feasibility of this technique for future HRWS SAR systems.
Conference paper (PDF, 1544 KB)


Citation: Jin, T., Qiu, X., Hu, D., and Ding, C.: ERROR ESTIMATION AND UNAMBIGUOUS RECONSTRUCTION FOR CHINESE FIRST DUAL-CHANNEL SPACEBORNE SAR IMAGING, ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., IV-2/W4, 465-470, https://doi.org/10.5194/isprs-annals-IV-2-W4-465-2017, 2017.

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