{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T02:57:08Z","timestamp":1760151428444,"version":"build-2065373602"},"reference-count":21,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2022,3,23]],"date-time":"2022-03-23T00:00:00Z","timestamp":1647993600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Special Fund for Research on National Major Research Instruments","award":["31727901"],"award-info":[{"award-number":["31727901"]}]},{"name":"Major Scientific and Technological Innovation Project","award":["2020CXGC010802"],"award-info":[{"award-number":["2020CXGC010802"]}]},{"DOI":"10.13039\/501100001809","name":"The National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["62001021"],"award-info":[{"award-number":["62001021"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>For entomological radar, the polarization information of the target is usually used to estimate the biological parameters, such as orientation, body length, and mass, of the insect. Thus, the accuracy of polarization measurement directly affects the performance of the biological parameters\u2019 estimation. The polarization measurement error is mainly caused by the imbalance of amplitude and phase between two polarization channels and the crosstalk of the dual-polarization antenna. In order to obtain the correct polarization information of the target, the polarimetric calibration of the entomological radar is required. This paper proposes a new polarimetric calibration technique based on antenna rotation, which does not require the calibrator to have a specific polarization scattering matrix (PSM). Compared with the currently existing calibration techniques, no prior knowledge of the calibrator PSM is required (in fact, any fixed-point target can be used as a calibrator); thus, the errors introduced by the mechanical process can be avoided. Simulations and data measured by radar verify the effectiveness of the method. This method has the potential to be extended to other fully polarimetric radar systems in the future, such as fully polarimetric weather radar, fully polarimetric synthetic aperture radar (SAR), and so on.<\/jats:p>","DOI":"10.3390\/rs14071551","type":"journal-article","created":{"date-parts":[[2022,3,23]],"date-time":"2022-03-23T22:08:06Z","timestamp":1648073286000},"page":"1551","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Polarimetric Calibration Technique for a Fully Polarimetric Entomological Radar Based on Antenna Rotation"],"prefix":"10.3390","volume":"14","author":[{"given":"Teng","family":"Yu","sequence":"first","affiliation":[{"name":"School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China"},{"name":"Advanced Technology Research Institute, Beijing Institute of Technology, Jinan 250300, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Muyang","family":"Li","sequence":"additional","affiliation":[{"name":"School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1774-7800","authenticated-orcid":false,"given":"Weidong","family":"Li","sequence":"additional","affiliation":[{"name":"School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China"},{"name":"Advanced Technology Research Institute, Beijing Institute of Technology, Jinan 250300, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Huafeng","family":"Mao","sequence":"additional","affiliation":[{"name":"School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rui","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China"},{"name":"Advanced Technology Research Institute, Beijing Institute of Technology, Jinan 250300, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7582-5291","authenticated-orcid":false,"given":"Cheng","family":"Hu","sequence":"additional","affiliation":[{"name":"School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China"},{"name":"Advanced Technology Research Institute, Beijing Institute of Technology, Jinan 250300, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Teng","family":"Long","sequence":"additional","affiliation":[{"name":"School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,3,23]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"4028","DOI":"10.1109\/TAES.2021.3087817","article-title":"Joint association and registration in a multiradar system for migratory insect track observation","volume":"57","author":"Wang","year":"2021","journal-title":"IEEE Trans. Aerosp. Electron. Syst."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"337","DOI":"10.1146\/annurev-ento-120709-144820","article-title":"Recent insights from radar studies of insect flight","volume":"56","author":"Chapman","year":"2011","journal-title":"Ann. Rev. Entomol."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"393","DOI":"10.1098\/rstb.1993.0081","article-title":"A method for routine monitoring of the aerial migration of insects by using a vertical-looking radar","volume":"340","author":"Smith","year":"1993","journal-title":"Philos. Trans. Biol. Sci."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"23","DOI":"10.1016\/j.compag.2003.08.005","article-title":"Insect monitoring radar: Analytical time-domain algorithm for retrieving trajectory and target parameters","volume":"43","author":"Harman","year":"2004","journal-title":"Comput. Electron. Agric."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"209","DOI":"10.1016\/j.compag.2004.01.003","article-title":"Insect monitoring radar: Retrieval of wingbeat information from conical-scan observation data","volume":"43","author":"Wang","year":"2004","journal-title":"Comput. Electron. Agric."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"10","DOI":"10.1007\/s11432-019-2800-0","article-title":"Deep-learning-based extraction of the animal migration patterns from weather radar images","volume":"63","author":"Cui","year":"2020","journal-title":"Sci. China Inf. Sci."},{"key":"ref_7","first-page":"8","article-title":"Equivalent point estimation for small target groups tracking based on MLE","volume":"63","author":"Chao","year":"2019","journal-title":"Sci. China Inf. Sci."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"29306","DOI":"10.1007\/s11432-018-9598-x","article-title":"An improved radar detection and tracking method for small UAV under clutter environment","volume":"62","author":"Hu","year":"2019","journal-title":"Sci. China Inf. Sci."},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Mao, H., Wang, R., Hu, C., and Yang, J. (2019, January 11\u201313). Fully polarimetric radar observing insects flight. Proceedings of the IEEE International Conference on Signal, Information and Data Processing (ICSIDP), Chongqing, China.","DOI":"10.1109\/ICSIDP47821.2019.9172916"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"3927","DOI":"10.1109\/TGRS.2019.2959622","article-title":"Discrimination of parallel and perpendicular insects based on relative phase of scattering matrix eigenvalues","volume":"58","author":"Hu","year":"2020","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"20","DOI":"10.1109\/MAES.2019.2955575","article-title":"Entomological radar overview: System and signal processing","volume":"35","author":"Long","year":"2020","journal-title":"IEEE Aerosp. Electron. Syst. Mag."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1109\/LGRS.2017.2733719","article-title":"Accurate insect orientation extraction based on polarization scattering matrix estimation","volume":"14","author":"Hu","year":"2017","journal-title":"IEEE Geosci. Remote Sens. Lett."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"6212","DOI":"10.1109\/TGRS.2019.2904869","article-title":"Insect biological parameter estimation based on the invariant target parameters of the scattering matrix","volume":"57","author":"Hu","year":"2019","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"5022","DOI":"10.1080\/01431161.2017.1320453","article-title":"Ventral-aspect radar cross sections and polarization patterns of insects at X band and their relation to size and form","volume":"38","author":"Drake","year":"2017","journal-title":"Int. J. Remote Sens."},{"key":"ref_15","first-page":"222","article-title":"Research on the design and calibration of wideband fully polarized vertical insect radar","volume":"37","author":"Yu","year":"2021","journal-title":"J. Signal Process."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"245","DOI":"10.1109\/PROC.1986.13457","article-title":"Polarization diversity in radars","volume":"74","author":"Giuli","year":"1986","journal-title":"Proc. IEEE"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"1872","DOI":"10.1109\/36.729358","article-title":"Polarimetric calibration of the SIR-C C-band channel using active radar calibrators and polarization selective dihedrals","volume":"36","author":"Fujita","year":"1998","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"1022","DOI":"10.1109\/36.62627","article-title":"A convenient technique for polarimetric calibration of single-antenna radar systems","volume":"28","author":"Sarabandi","year":"1990","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_19","unstructured":"Boerner, W.M. (August, January 31). Recent advances in polarimetry and polarimetric interferometry. Proceedings of the IEEE International Symposium on Geoscience and Remote Sensing, Denver, CO, USA."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"1105","DOI":"10.1109\/8.97343","article-title":"A complete error model for free space polarimetric measurements","volume":"39","author":"Wiesbeck","year":"1991","journal-title":"IEEE Trans. Antennas Propag."},{"key":"ref_21","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. 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