{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,22]],"date-time":"2026-04-22T19:06:19Z","timestamp":1776884779696,"version":"3.51.2"},"reference-count":37,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2022,1,17]],"date-time":"2022-01-17T00:00:00Z","timestamp":1642377600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Calibration using corner reflectors is an effective way to estimate the distortion parameters of hybrid compact polarimetric (HCP) synthetic aperture radar (SAR) systems. However, the existing literature lacks a discussion on the inconsistency of the amplitude and phase coefficients between measured scattering vectors of different corner reflectors. In response to this problem, this paper first proves that this inconsistency will seriously deteriorate the estimation accuracy of polarimetric distortion parameters. Based on the optimization algorithm, two calibration schemes for simultaneously estimating the traditional distortion parameters and the amplitude\/phase coefficients are proposed while ignoring crosstalk (ICT) and considering crosstalk (CCT). In the process of distortion parameter estimation, the idea of \u201coptimizing while compensating\u201d is adopted to eliminate the problem of uneven echo intensity. Simulation results show that both schemes can eliminate the influence of the inconsistency of amplitude and phase coefficients, and estimate distortion parameters accurately. When the received crosstalk level is lower than \u221230 dB, the ICT scheme can accurately estimate polarimetric distortion parameters. The CCT scheme has a wider application range of crosstalk and can work well when the crosstalk level is lower than \u221220 dB, but it also has a higher requirement for the signal-to-clutter ratio (SCR). When SCR is greater than 35 dB, the CCT scheme yields higher estimation accuracy than the ICT scheme. In addition, the effectiveness of the calibration schemes is verified based on the L-band measured data acquired by the Aerospace Information Research Institute, Chinese Academy of Sciences.<\/jats:p>","DOI":"10.3390\/rs14020416","type":"journal-article","created":{"date-parts":[[2022,1,17]],"date-time":"2022-01-17T20:49:21Z","timestamp":1642452561000},"page":"416","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Hybrid Compact Polarimetric SAR Calibration Considering the Amplitude and Phase Coefficients Inconsistency"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5665-9478","authenticated-orcid":false,"given":"Wentao","family":"Hou","sequence":"first","affiliation":[{"name":"Department of Space Microwave Remote Sensing System, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, China"},{"name":"School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100039, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fengjun","family":"Zhao","sequence":"additional","affiliation":[{"name":"Department of Space Microwave Remote Sensing System, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiuqing","family":"Liu","sequence":"additional","affiliation":[{"name":"Department of Space Microwave Remote Sensing System, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dacheng","family":"Liu","sequence":"additional","affiliation":[{"name":"Department of Space Microwave Remote Sensing System, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, China"},{"name":"School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100039, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yonghui","family":"Han","sequence":"additional","affiliation":[{"name":"Department of Space Microwave Remote Sensing System, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, China"},{"name":"School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100039, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yao","family":"Gao","sequence":"additional","affiliation":[{"name":"Department of Space Microwave Remote Sensing System, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, China"},{"name":"School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100039, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9850-7015","authenticated-orcid":false,"given":"Robert","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Space Microwave Remote Sensing System, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, China"},{"name":"School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100039, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,1,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"3397","DOI":"10.1109\/TGRS.2007.895883","article-title":"Hybrid-polarity SAR architecture","volume":"45","author":"Raney","year":"2007","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"White, L., Millard, K., Banks, S., Richardson, M., Pasher, J., and Duffe, J. (2017). Moving to the RADARSAT Constellation Mission: Comparing Synthesized Compact Polarimetry and Dual Polarimetry Data with Fully Polarimetric RADARSAT-2 Data for Image Classification of Peatlands. Remote Sens., 9.","DOI":"10.3390\/rs9060573"},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Yin, J., and Yang, J. (2021). Framework for Reconstruction of Pseudo Quad Polarimetric Imagery from General Compact Polarimetry. Remote Sens., 13.","DOI":"10.3390\/rs13030530"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"4647","DOI":"10.1109\/JSTARS.2021.3065431","article-title":"General Two-Stage Model-Based Three-Component Hybrid Compact Polarimetric SAR Decomposition Method","volume":"14","author":"Hou","year":"2021","journal-title":"IEEE J. Sel. Topics Appl. Earth Observ. Remote Sens."},{"key":"ref_5","first-page":"1","article-title":"A Unified Framework for Comparing the Classification Performance between Quad-, Compact-, and Dual-Polarimetric SARs","volume":"60","author":"Hou","year":"2021","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"189","DOI":"10.1016\/j.rse.2013.08.035","article-title":"Towards sea ice classification using simulated RADARSAT Constellation Mission compact polarimetric SAR imagery","volume":"140","author":"Dabboor","year":"2014","journal-title":"Remote Sens. Environ."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"2033","DOI":"10.1109\/TGRS.2015.2494860","article-title":"Soil moisture estimation using hybrid polarimetric SAR data of RISAT-1","volume":"54","author":"Ponnurangam","year":"2015","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Olthof, I., and Rainville, T. (2020). Evaluating Simulated RADARSAT Constellation Mission (RCM) Compact Polarimetry for Open-Water and Flooded-Vegetation Wetland Mapping. Remote Sens., 12.","DOI":"10.3390\/rs12091476"},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Raney, R.K. (2019). Hybrid dual-polarization synthetic aperture radar. Remote Sens., 11.","DOI":"10.3390\/rs11131521"},{"key":"ref_10","first-page":"533","article-title":"Mini-SAR: An imaging radar experiment for the Chandrayaan-1 mission to the Moon","volume":"96","author":"Spudis","year":"2009","journal-title":"Curr. Sci."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"7","DOI":"10.1007\/s11214-010-9631-5","article-title":"Lunar Reconnaissance Orbiter (LRO): Observations for lunar exploration and science","volume":"150","author":"Vondrak","year":"2010","journal-title":"Space Sci. Rev."},{"key":"ref_12","first-page":"446","article-title":"Synthetic aperture radar payload on-board RISAT-1: Configuration, technology and performance","volume":"104","author":"Misra","year":"2013","journal-title":"Curr. Sci."},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Kankaku, Y., Suzuki, S., and Osawa, Y. (2013, January 21\u201326). ALOS-2 mission and development status. Proceedings of the 2013 IEEE International Geoscience and Remote Sensing Symposium\u2014IGARSS, Melbourne, Australia.","DOI":"10.1109\/IGARSS.2013.6723302"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"401","DOI":"10.1080\/07038992.2015.1104633","article-title":"Overview of the RADARSAT Constellation Mission","volume":"41","author":"Thompson","year":"2015","journal-title":"Can. J. Remote Sens."},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Brisco, B., Mahdianpari, M., and Mohammadimanesh, F. (2020). Hybrid Compact Polarimetric SAR for Environmental Monitoring with the RADARSAT Constellation Mission. Remote Sens., 12.","DOI":"10.3390\/rs12203283"},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Jung, Y.T., and Park, S.E. (2018). Comparative Analysis of Polarimetric SAR Calibration Methods. Remote Sens., 10.","DOI":"10.3390\/rs10122060"},{"key":"ref_17","unstructured":"Freeman, A., Dubois-Fernandez, P., and Truong-Loi, M.L. (, January 2\u20135). Compact Polarimetry at longer wavelengths-calibration. Proceedings of the 7th European Conference on Synthetic Aperture Radar, Friedrichshafen, Germany."},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Truong-Lo\u00ef, M.L., Dubois-Fernandez, P., Pottier, E., Freeman, A., and Souyris, J.C. (2010, January 25\u201330). Potentials of a compact polarimetric SAR system. Proceedings of the 2010 IEEE International Geoscience and Remote Sensing Symposium\u2014IGARSS, Honolulu, HI, USA.","DOI":"10.1109\/IGARSS.2010.5649036"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"3731","DOI":"10.1109\/JSTARS.2019.2932019","article-title":"Polarimetric calibration of RISAT-1 compact-pol data","volume":"12","author":"Babu","year":"2019","journal-title":"IEEE J. Sel. Topics Appl. Earth Observ. Remote Sens."},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Kumar, S., Babu, A., Agrawal, S., Asopa, U., Shukla, S., and Maiti, A. (2021). Polarimetric calibration of spaceborne and airborne multifrequency SAR data for scattering-based characterization of manmade and natural features. Adv. Space Res.","DOI":"10.1016\/j.asr.2021.02.023"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"2712","DOI":"10.1109\/TGRS.2011.2109065","article-title":"Calibration of spaceborne CTLR compact polarimetric low-frequency SAR using mixed radar calibrators","volume":"49","author":"Chen","year":"2011","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"424","DOI":"10.1109\/LGRS.2018.2791858","article-title":"A tool for analysis and calibration of compact polarimetry SAR mode anomaly","volume":"15","author":"Sabry","year":"2018","journal-title":"IEEE Geosci. Remote Sens. Lett."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"7472","DOI":"10.1109\/TGRS.2020.2983008","article-title":"Assessment of PALSAR-2 Compact Non-Circularity Using Amazonian Rainforests","volume":"58","author":"Touzi","year":"2020","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"4433","DOI":"10.1109\/TGRS.2016.2541666","article-title":"Calibration of compact polarimetric SAR images using distributed targets and one corner reflector","volume":"54","author":"Tan","year":"2016","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"848","DOI":"10.1109\/36.406671","article-title":"SIR-C data quality and calibration results","volume":"33","author":"Freeman","year":"1995","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"922","DOI":"10.1109\/36.101371","article-title":"Absolute radiometric calibration of the CCRS SAR","volume":"29","author":"Ulander","year":"1991","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"134","DOI":"10.3847\/PSJ\/abfdbf","article-title":"Chandrayaan-2 Dual-Frequency SAR (DFSAR): Performance Characterization and Initial Results","volume":"2","author":"Bhiravarasu","year":"2021","journal-title":"Planet. Sci. J."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"7242","DOI":"10.1080\/01431161.2017.1371858","article-title":"Radiometric calibration stability assessment for the RISAT-1 SAR sensor using a deployed point target array at the Desalpar site, Rann of Kutch, India","volume":"38","author":"Sharma","year":"2017","journal-title":"Int. J. Remote Sens."},{"key":"ref_29","first-page":"18","article-title":"Design and Verification of Image Quallity Indexes of GF-3 Satellite","volume":"6","author":"Zhao","year":"2017","journal-title":"Spacecr. Eng."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"62","DOI":"10.1109\/8.64436","article-title":"A general polarimetric radar calibration technique","volume":"39","author":"Whitt","year":"1991","journal-title":"IEEE Trans. Antennas Propag."},{"key":"ref_31","unstructured":"Roweis, S. (1996). Levenberg-Marquardt Optimization. Notes, University of Toronto."},{"key":"ref_32","first-page":"101","article-title":"The levenberg-marquardt algorithm","volume":"11","author":"Ranganathan","year":"2004","journal-title":"Tutor. LM Algorithm"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"193","DOI":"10.1049\/el:20010104","article-title":"Similarity between two scattering matrices","volume":"37","author":"Yang","year":"2001","journal-title":"Electron. Lett."},{"key":"ref_34","unstructured":"Tan, H. (2016). Study on Methods of Calibration and Correction of Compact Polarimetric SAR. [Ph.D. Thesis, University Chinese Academy of Sciences]."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"2735","DOI":"10.1109\/TGRS.2003.815399","article-title":"Faraday rotation effects on L-band spaceborne SAR data","volume":"41","author":"Wright","year":"2003","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_36","doi-asserted-by":"crossref","unstructured":"Lee, J.S., and Pottier, E. (2017). Polarimetric Radar Imaging: From Basics to Applications, CRC Press.","DOI":"10.1201\/9781420054989"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"217","DOI":"10.1109\/TAP.1967.1138904","article-title":"The polarization sphere as a graphical aid in determining the polarization of an antenna by amplitude measurements only","volume":"15","author":"Knittel","year":"1967","journal-title":"IEEE Trans. Antennas Propag."}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/14\/2\/416\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T22:02:34Z","timestamp":1760133754000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/14\/2\/416"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,1,17]]},"references-count":37,"journal-issue":{"issue":"2","published-online":{"date-parts":[[2022,1]]}},"alternative-id":["rs14020416"],"URL":"https:\/\/doi.org\/10.3390\/rs14020416","relation":{},"ISSN":["2072-4292"],"issn-type":[{"value":"2072-4292","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,1,17]]}}}