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(SWH), and main wave wavelength (MWW) can be typically retrieved using an interferometric imaging radar altimeter (InIRA). However, the inversion accuracy of ocean waves in Ku (15.8 GHz) and Ka (35.8 GHz) bands has not yet been evaluated due to the lack of field observation data. In this paper, to assess the inversion accuracy of OWPs in Ku and Ka bands, an airborne observation experiment using simultaneous Ku and Ka bands was carried out for the first time in Rizhao, Shandong Province, China. A dual-band InIRA (DInIRA) was configured with small incidence angles (4\u00b0\u201318\u00b0) and a Global Navigation Satellite System (GNSS) buoy; a mobile weather station was placed at the intersection of the plane routes for validation. Afterward, the WPD, SWH, and MWW were retrieved based on the imaging of sea surface height. As compared with the field in situ data, the WPD inversion results of main wind wave were found to be consistent with the measurement environmental wind direction. The SWH inversion biases, retrieved by the Ku and Ka bands, were 0.38 m and 0.27 m; the MWW inversion biases for the swells were equal to 16.75 m and 3.67 m; and the MWW inversion biases about the wind waves were 2.32 m and 0.57 m. Ultimately, it was established that the OWPs could be effectively retrieved by the DInIRA, and the inversion accuracy of the SWH and the MWW in the Ka band outperformed that in the Ku band.<\/jats:p>","DOI":"10.3390\/rs14153578","type":"journal-article","created":{"date-parts":[[2022,7,27]],"date-time":"2022-07-27T04:59:16Z","timestamp":1658897956000},"page":"3578","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Ocean Wave Inversion Based on a Ku\/Ka Dual-Band Airborne Interferometric Imaging Radar Altimeter"],"prefix":"10.3390","volume":"14","author":[{"given":"Chunyong","family":"Ma","sequence":"first","affiliation":[{"name":"College of Information Science and Engineering, Ocean University of China, No.238 Songling Road, Qingdao 266100, China"},{"name":"Qingdao National Laboratory for Marine Science and Technology, No.168 Wenhai Middle Road, Qingdao 266200, China"}]},{"given":"Lichao","family":"Pan","sequence":"additional","affiliation":[{"name":"College of Information Science and Engineering, Ocean University of China, No.238 Songling Road, Qingdao 266100, China"}]},{"given":"Zhiwei","family":"Qiu","sequence":"additional","affiliation":[{"name":"College of Information Science and Engineering, Ocean University of China, No.238 Songling Road, Qingdao 266100, China"},{"name":"School of Marine Technology and Geomatics, Jiangsu Ocean University, No.59 Cangwu Road, Lianyungang 222006, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9092-5298","authenticated-orcid":false,"given":"Da","family":"Liang","sequence":"additional","affiliation":[{"name":"College of Information Science and Engineering, Ocean University of China, No.238 Songling Road, Qingdao 266100, China"}]},{"given":"Ge","family":"Chen","sequence":"additional","affiliation":[{"name":"College of Information Science and Engineering, Ocean University of China, No.238 Songling Road, Qingdao 266100, China"},{"name":"Qingdao National Laboratory for Marine Science and Technology, No.168 Wenhai Middle Road, Qingdao 266200, China"}]},{"given":"Fangjie","family":"Yu","sequence":"additional","affiliation":[{"name":"College of Information Science and Engineering, Ocean University of China, No.238 Songling Road, Qingdao 266100, China"},{"name":"Qingdao National Laboratory for Marine Science and Technology, No.168 Wenhai Middle Road, Qingdao 266200, China"}]},{"given":"Hanwei","family":"Sun","sequence":"additional","affiliation":[{"name":"Beijing Institute of Radio Measurement, Beijing 100854, China"}]},{"given":"Daozhong","family":"Sun","sequence":"additional","affiliation":[{"name":"College of Information Science and Engineering, Ocean University of China, No.238 Songling Road, Qingdao 266100, China"}]},{"given":"Weifeng","family":"Wu","sequence":"additional","affiliation":[{"name":"Collecte Localisation Satellites Company, No.11 Rue Herm\u00e8s, Parc Technologique Du Canal, 31520 Ramonville Saint-Agne, France"}]}],"member":"1968","published-online":{"date-parts":[[2022,7,26]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"471","DOI":"10.5194\/os-12-471-2016","article-title":"Jason Continuity of Services: Continuing the Jason Altimeter Data Records as Copernicus Sentinel-6","volume":"12","author":"Scharroo","year":"2016","journal-title":"Ocean Sci."},{"key":"ref_2","first-page":"17","article-title":"Cross-Calibrations of the HY-2B Altimeter Using Jason-3 Satellite During the Period of April 2019\u2013September 2020","volume":"9","author":"Wang","year":"2021","journal-title":"Front. 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