{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,31]],"date-time":"2026-03-31T16:35:53Z","timestamp":1774974953072,"version":"3.50.1"},"reference-count":28,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2015,1,14]],"date-time":"2015-01-14T00:00:00Z","timestamp":1421193600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Marine X-band radar based systems are well tested to provide information about sea state and bathymetry. It is also well known that complex geometries and non-uniform bathymetries provide a much bigger challenge than offshore scenarios. In order to tackle this issue a retrieval method is proposed, based on spatial partitioning of the data and the application of the Normalized Scalar Product (NSP), which is an innovative procedure for the joint estimation of bathymetry and surface currents. The strategy is then applied to radar data acquired around a harbour entrance, and results show that the reconstructed bathymetry compares well with ground truth data obtained by an echo-sounder campaign, thus proving the reliability of the whole procedure. The spectrum thus retrieved is then analysed to show the evidence of reflected waves from the harbour jetties, as confirmed by chain of hydrodynamic models of the sea wave field. The possibility of using a land based radar to reveal sea wave reflection is entirely new and may open up new operational applications of the system.     <\/jats:p>","DOI":"10.3390\/s150101691","type":"journal-article","created":{"date-parts":[[2015,1,14]],"date-time":"2015-01-14T10:33:15Z","timestamp":1421231595000},"page":"1691-1707","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":37,"title":["An X-Band Radar System for Bathymetry and Wave Field Analysis in a Harbour Area"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5672-2721","authenticated-orcid":false,"given":"Giovanni","family":"Ludeno","sequence":"first","affiliation":[{"name":"Institute for Electromagnetic Sensing of Environment (IREA), Italian National Research Council (CNR), Via Diocleziano 328, 80124 Napoli, Italy"},{"name":"Department of the Industrial and Information Engineering, Second University of Naples,  Via Roma 29, 81031 Aversa (CE), Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6146-4023","authenticated-orcid":false,"given":"Ferdinando","family":"Reale","sequence":"additional","affiliation":[{"name":"Maritime Engineering Division University of Salerno (MEDUS), Department of Civil Engineering of University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano (SA), Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fabio","family":"Dentale","sequence":"additional","affiliation":[{"name":"Maritime Engineering Division University of Salerno (MEDUS), Department of Civil Engineering of University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano (SA), Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Eugenio","family":"Carratelli","sequence":"additional","affiliation":[{"name":"Maritime Engineering Division University of Salerno (MEDUS), Department of Civil Engineering of University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano (SA), Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Antonio","family":"Natale","sequence":"additional","affiliation":[{"name":"Institute for Electromagnetic Sensing of Environment (IREA), Italian National Research Council (CNR), Via Diocleziano 328, 80124 Napoli, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0377-3127","authenticated-orcid":false,"given":"Francesco","family":"Soldovieri","sequence":"additional","affiliation":[{"name":"Institute for Electromagnetic Sensing of Environment (IREA), Italian National Research Council (CNR), Via Diocleziano 328, 80124 Napoli, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0377-3127","authenticated-orcid":false,"given":"Francesco","family":"Serafino","sequence":"additional","affiliation":[{"name":"Institute for Electromagnetic Sensing of Environment (IREA), Italian National Research Council (CNR), Via Diocleziano 328, 80124 Napoli, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2015,1,14]]},"reference":[{"key":"ref_1","unstructured":"Beal, R.C. (1991). Directional Ocean Wave Spectra: Measuring, Modeling, Predicting and Applying, The Johns Hopkins University Press. [1st ed.]."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"16299","DOI":"10.1029\/JC095iC09p16299","article-title":"Evidence of Bragg scattering in microwave Doppler spectra of sea return","volume":"95","author":"Plant","year":"1990","journal-title":"J. Geophys. Res."},{"key":"ref_3","unstructured":"Lacoste, H. (2006, January 23\u201326). Numerical PSEUDO-Random Simulation of SAR Sea and Wind Response. Advances in SAR Oceanography from Envisat and ERS Missions, Frascati (RM), Italy."},{"key":"ref_4","unstructured":"Lacoste, H., and Ouwehand, L. (2007, January 23\u201327). Reconstruction of SAR Wave Image Effects through Pseudo Random Simulation. Montreux, Switzerland."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"960","DOI":"10.1109\/TGRS.2011.2162245","article-title":"Simulation of L-Band Bistatic Returns From the Ocean Surface: A Facet Approach With Application to Ocean GNSS Reflectometry","volume":"50","author":"Clarizia","year":"2012","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Clarizia, M.P., di Bisceglie, M, Galdi, C., Gommenginger, C., and Srokosz, M.A. (2009, January 12\u201317). Simulation of GNSS-R Return for Delay-Doppler Analysis of the Ocean Surface. Cape Town, South Africa.","DOI":"10.1109\/IGARSS.2009.5418036"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"231","DOI":"10.1109\/LGRS.2009.2031878","article-title":"A Novel Strategy for the Surface Current Determination from Marine X-Band Radar data","volume":"7","author":"Serafino","year":"2010","journal-title":"IEEE Geosci. Remote Sens. Lett."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"6522","DOI":"10.3390\/s100706522","article-title":"Bathymetry Determination via X-Band Radar Data: A New Strategy and Numerical Results","volume":"10","author":"Serafino","year":"2010","journal-title":"Sensors"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"2267","DOI":"10.1109\/TGRS.2008.916474","article-title":"Determination of bathymetric and current maps by the method DiSC based on the analysis of nautical X-Band radar image sequences of the sea surface","volume":"46","author":"Senet","year":"2008","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"244","DOI":"10.1109\/LGRS.2013.2254464","article-title":"X-Band Marine Radar System for High-Speed Navigation Purposes: A Test Case on a Cruise Ship","volume":"11","author":"Ludeno","year":"2014","journal-title":"IEEE Geosci. Remote Sens. Lett."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"822","DOI":"10.1109\/LGRS.2011.2182031","article-title":"REMOCEAN: A Flexible X-Band Radar System for Sea-State Monitoring and Surface Current Estimation","volume":"9","author":"Serafino","year":"2012","journal-title":"IEEE Geosci. Remote Sens. Lett."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"234","DOI":"10.1109\/LGRS.2013.2254107","article-title":"A Novel Approach Based on Marine Radar Data Analysis for High-Resolution Bathymetry Map Generation","volume":"11","author":"Ludeno","year":"2014","journal-title":"IEEE Geosci. Remote Sens. Lett."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"3011","DOI":"10.1109\/JSTARS.2014.2321048","article-title":"Remocean System for the Detection of the Reflected Waves from the Costa Concordia Ship Wreck","volume":"7","author":"Ludeno","year":"2014","journal-title":"IEEE J. Sel. Top. Appl. Earth Obs. Remote Sens."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"1","DOI":"10.2205\/2011ES000507","article-title":"Sample application of a low-cost X-band monitoring system of surface currents at the Black Sea shore","volume":"12","author":"Ivonin","year":"2011","journal-title":"Russ. J. Earth Sci."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"1868","DOI":"10.1109\/JSTARS.2012.2208179","article-title":"Surface Current Measurement Under Low Sea State Using Dual Polarized X-Band Nautical Radar","volume":"5","author":"Huang","year":"2012","journal-title":"IEEE J. Sel. Top. Appl. Earth Obs. Remote Sens."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"2141","DOI":"10.1007\/s10236-011-0478-4","article-title":"Mapping bathymetry using X-band marine radar data recorded from a moving vessel","volume":"61","author":"Bell","year":"2011","journal-title":"Ocean Dyn."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"989","DOI":"10.1007\/s10236-014-0724-7","article-title":"High-resolution X-band radar measurements of currents, bathymetry and sea state in highly inhomogeneous coastal areas","volume":"64","author":"Hessner","year":"2014","journal-title":"Ocean Dyn."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"7667","DOI":"10.1029\/1998JC900123","article-title":"A third-generation wave model for coastal regions: 2. Verification","volume":"104","author":"Ris","year":"1999","journal-title":"J. Geophys. Res."},{"key":"ref_19","unstructured":"SWAN TU Delft Available online: http:\/\/www.swan.tudelft.nl."},{"key":"ref_20","unstructured":"Edge, B.L. (1988, January 20\u201325). Reflections from Coastal Structures. Torremolinos, Spain."},{"key":"ref_21","unstructured":"Reeve, D., Chadwick, A., and Fleming, C. (2004). Coastal Engineering: Processes, Theory and Design Practice, SPON Press Taylor & Francis Group. [1st ed.]."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"1291","DOI":"10.1175\/1520-0426(2004)021<1291:IOMRIF>2.0.CO;2","article-title":"Inversion of marine radar images for surface wave analysis","volume":"21","author":"Hessner","year":"2004","journal-title":"J. Atmos. Ocean. Technol."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"999","DOI":"10.1007\/s10236-014-0725-6","article-title":"Marine radar ocean wave retrieval's dependency on range and azimuth","volume":"64","author":"Lund","year":"2014","journal-title":"Ocean Dyn."},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Plant, W.J., and Farquharson, G. (2012). Wave shadowing and modulation of microwave backscatter from the ocean. J. Geophys. Res., 117.","DOI":"10.1029\/2012JC007912"},{"key":"ref_25","unstructured":"ECMWF Available online: http:\/\/www.ecmwf.int."},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"The Wamdi Group (1988). The WAM Model\u2014A Third Generation Ocean Wave Prediction Model. J. Phys. Oceanogr., 18, 1775\u20131810.","DOI":"10.1175\/1520-0485(1988)018<1775:TWMTGO>2.0.CO;2"},{"key":"ref_27","unstructured":"PHAROS Deltares Available online: http:\/\/www.deltares.nl\/en\/software\/919484\/pharos."},{"key":"ref_28","unstructured":"Remocean Available online: http:\/\/www.remocean.it."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/15\/1\/1691\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T20:41:37Z","timestamp":1760215297000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/15\/1\/1691"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2015,1,14]]},"references-count":28,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2015,1]]}},"alternative-id":["s150101691"],"URL":"https:\/\/doi.org\/10.3390\/s150101691","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2015,1,14]]}}}