{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T04:03:45Z","timestamp":1760241825471,"version":"build-2065373602"},"reference-count":27,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2018,9,17]],"date-time":"2018-09-17T00:00:00Z","timestamp":1537142400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"the National Key R&amp;D Program of China","award":["the Grant 2017YFC1405600"],"award-info":[{"award-number":["the Grant 2017YFC1405600"]}]},{"name":"the Fundamental Research Funds for the Central Universities","award":["the Grant JB180213"],"award-info":[{"award-number":["the Grant JB180213"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Multichannel SAR is an effective approach to solving the contradiction between high azimuth resolution and wide swath. The goal of this paper is to obtain a new and effective method for estimating and compensating the interchannel phase error of the Chinese GF-3 Synthetic aperture radar (SAR). A channel phase error correction method based on the optimal value of the image domain quality function is proposed. In this method, the phase error is initially compensated using the correlation function method. In the fine correction of dual-channel phase error, a heuristic search algorithm is used to estimate the residual phase by searching the extremum of the quality function. After phase compensation in the image domain, the azimuth ambiguities caused by the remaining phase are eliminated. The proposed image domain processing method provides a new idea for channel phase error correction. The measured data of high-resolution GF-3 dual-channel ultrafine imaging mode verifies the validity of this method.<\/jats:p>","DOI":"10.3390\/s18093131","type":"journal-article","created":{"date-parts":[[2018,9,17]],"date-time":"2018-09-17T10:42:20Z","timestamp":1537180940000},"page":"3131","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":16,"title":["A Channel Phase Error Correction Method Based on Joint Quality Function of GF-3 SAR Dual-Channel Images"],"prefix":"10.3390","volume":"18","author":[{"given":"Guangcai","family":"Sun","sequence":"first","affiliation":[{"name":"National Laboratory of Radar Signal Processing, Xidian University, Xi\u2019an 710071, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jixiang","family":"Xiang","sequence":"additional","affiliation":[{"name":"National Laboratory of Radar Signal Processing, Xidian University, Xi\u2019an 710071, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mengdao","family":"Xing","sequence":"additional","affiliation":[{"name":"National Laboratory of Radar Signal Processing, Xidian University, Xi\u2019an 710071, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jun","family":"Yang","sequence":"additional","affiliation":[{"name":"College of Geomatics, Xi\u2019an University of Science and Technology, Xi\u2019an 710000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Liang","family":"Guo","sequence":"additional","affiliation":[{"name":"School of Physics and Optoelectronic Engineering, Xidian University, Xi\u2019an 710071, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2018,9,17]]},"reference":[{"key":"ref_1","unstructured":"Kovaly, J.J. (1976). Synthetic Aperture Radar, Artech House, Inc."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"4761","DOI":"10.1109\/TGRS.2012.2230267","article-title":"Multichannel Full-Aperture Azimuth Processing for Beam Steering SAR","volume":"51","author":"Sun","year":"2013","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1425","DOI":"10.1109\/JSTARS.2016.2618518","article-title":"Improved Signal Reconstruction Algorithm for Multichannel SAR Based on the Doppler Spectrum Estimation","volume":"10","author":"Zuo","year":"2017","journal-title":"IEEE J. Sel. Top. Appl. Earth Obs. Remote Sens."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"966","DOI":"10.1109\/TGRS.2012.2204889","article-title":"Robust Ground Moving-Target Imaging Using Deramp-Keystone Processing","volume":"51","author":"Sun","year":"2013","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_5","unstructured":"Roth, A. (2003, January 22\u201323). TerraSAR-X: A new perspective for scientific use of high resolution spaceborne SAR data. Proceedings of the IEEE 2nd GRSS\/ISPRS Joint Workshop on Remote Sensing and Data Fusion over Urban Areas, Berlin, Germany."},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Wang, H., Yang, J., Mouche, A., Shao, W., Zhu, J., Ren, L., and Xie, C. (2017). GF-3 SAR ocean wind retrieval: The first view and preliminary assessment. Remote Sens., 9.","DOI":"10.3390\/rs9070694"},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Wang, T., Zhang, G., Yu, L., Zhao, R., Deng, M., and Xu, K. (2017). Multi-mode GF-3 satellite image geometric accuracy verification using the RPC model. Sensors, 17.","DOI":"10.3390\/s17092005"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"3139","DOI":"10.1109\/TGRS.2012.2212280","article-title":"A Unified Focusing Algorithm for Several Modes of SAR Based on FrFT","volume":"51","author":"Sun","year":"2013","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"1036","DOI":"10.1109\/LGRS.2011.2151174","article-title":"Sliding Spotlight and TOPS SAR Data Processing Without Subaperture","volume":"8","author":"Sun","year":"2011","journal-title":"IEEE Geosci. Remote Sens. Lett."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"122","DOI":"10.1049\/ip-f-2.1992.0016","article-title":"Wide-swath SAR","volume":"139","author":"Currie","year":"1992","journal-title":"IEE Proc. F Radar and Signal Process."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"101","DOI":"10.1109\/LGRS.2012.2193870","article-title":"Mitigating range ambiguities in high-PRF SAR with OFDM waveform diversity","volume":"10","author":"Wang","year":"2013","journal-title":"IEEE Geosci. Remote Sens. Lett."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"29","DOI":"10.1049\/ecej:19990106","article-title":"Space-time processing for multichannel synthetic aperture radar","volume":"11","author":"Ender","year":"1999","journal-title":"Electron. Commun. Eng. J."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"260","DOI":"10.1109\/LGRS.2004.832700","article-title":"Unambiguous SAR signal reconstruction from nonuniform displaced phase center sampling","volume":"1","author":"Krieger","year":"2004","journal-title":"IEEE Geosci. Remote Sens. Lett."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"3317","DOI":"10.1109\/TGRS.2007.900693","article-title":"TanDEM-X: A satellite formation for high-resolution SAR interferometry","volume":"45","author":"Krieger","year":"2007","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Liu, Y.-Y., Li, Z.-F., Suo, Z.-Y., and Bao, Z. (2013, January 14\u201316). A novel channel phase bias estimation method for spaceborne along-track multi-channel HRWS SAR in time-domain. Proceedings of the IET International Radar Conference 2013, Xi\u2019an, China.","DOI":"10.3724\/SP.J.1146.2012.00562"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"903","DOI":"10.1109\/LGRS.2012.2227107","article-title":"Phase mismatch calibration of the multichannel SAR based on azimuth cross correlation","volume":"10","author":"Feng","year":"2013","journal-title":"IEEE Geosci. Remote Sens. Lett."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"436","DOI":"10.1109\/TAES.2006.1642562","article-title":"Performance improvement for constellation SAR using signal processing techniques","volume":"42","author":"Li","year":"2006","journal-title":"IEEE Trans. Aerosp. Electron. Syst."},{"key":"ref_18","unstructured":"Soumekh, M., and Himed, B. (2002, January 25). SAR-MTI processing of multi-channel airborne radar measurement (MCARM) data. Proceedings of the IEEE Radar Conference, Long Beach, CA, USA."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"2831","DOI":"10.3724\/SP.J.1146.2007.00923","article-title":"The clutter suppression method of airborne multi-channel SAR-GMTI system","volume":"30","author":"Yang","year":"2008","journal-title":"J. Electron. Inf. Technol."},{"key":"ref_20","first-page":"2045","article-title":"Method of removing azimuth ambiguities with channel errors","volume":"30","author":"Jing","year":"2008","journal-title":"Syst. Eng. Electron."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"82","DOI":"10.1109\/LGRS.2004.840610","article-title":"Generation of wide-swath and high-resolution SAR images from multichannel small spaceborne SAR systems","volume":"2","author":"Li","year":"2005","journal-title":"IEEE Geosci. Remote Sens. Lett."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"5294","DOI":"10.1109\/TIP.2013.2274387","article-title":"A robust channel-calibration algorithm for multi-channel in azimuth HRWS SAR imaging based on local maximum-likelihood weighted minimum entropy","volume":"22","author":"Zhang","year":"2013","journal-title":"IEEE Trans. Image Process."},{"key":"ref_23","unstructured":"S\u00fc\u00df, M., Grafm\u00fcller, B., and Zahn, R. (2001, January 9\u201313). A novel high resolution, wide swath SAR system. Proceedings of the IEEE 2001 International Geoscience and Remote Sensing Symposium (IGARSS\u201901), Sydney, Australia."},{"key":"ref_24","unstructured":"Krieger, G., Gebert, N., Younis, M., Bordoni, F., Patyuchenko, A., and Moreira, A. (2008, January 2\u20135). Advanced concepts for ultra-wide-swath SAR imaging. Proceedings of the 7th European Conference on Synthetic Aperture Radar (EUSAR), Friedrichshafen, Germany."},{"key":"ref_25","first-page":"3","article-title":"Digital processing of synthetic aperture radar data","volume":"1","author":"Cumming","year":"2005","journal-title":"Artech House"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"91","DOI":"10.1080\/03052159108941063","article-title":"Hill-climbing, simulated annealing and the steiner problem in graphs","volume":"17","author":"Dowsland","year":"1991","journal-title":"Eng. Optim."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"177","DOI":"10.1016\/0004-3702(95)00040-2","article-title":"PALO: A probabilistic hill-climbing algorithm","volume":"84","author":"Greiner","year":"1996","journal-title":"Artif. 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