{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,27]],"date-time":"2026-01-27T21:58:17Z","timestamp":1769551097419,"version":"3.49.0"},"reference-count":74,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2020,5,16]],"date-time":"2020-05-16T00:00:00Z","timestamp":1589587200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100000844","name":"European Space Agency","doi-asserted-by":"publisher","award":["ESA\/AO\/1-8500\/15\/I-SBo"],"award-info":[{"award-number":["ESA\/AO\/1-8500\/15\/I-SBo"]}],"id":[{"id":"10.13039\/501100000844","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>A field intercomparison was conducted at the Acqua Alta Oceanographic Tower (AAOT) in the northern Adriatic Sea, from 9 to 19 July 2018 to assess differences in the accuracy of in- and above-water radiometer measurements used for the validation of ocean colour products. Ten measurement systems were compared. Prior to the intercomparison, the absolute radiometric calibration of all sensors was carried out using the same standards and methods at the same reference laboratory. Measurements were performed under clear sky conditions, relatively low sun zenith angles, moderately low sea state and on the same deployment platform and frame (except in-water systems). The weighted average of five above-water measurements was used as baseline reference for comparisons. For downwelling irradiance ( E d ), there was generally good agreement between sensors with differences of &lt;6% for most of the sensors over the spectral range 400 nm\u2013665 nm. One sensor exhibited a systematic bias, of up to 11%, due to poor cosine response. For sky radiance ( L s k y ) the spectrally averaged difference between optical systems was &lt;2.5% with a root mean square error (RMS) &lt;0.01 mWm\u22122 nm\u22121 sr\u22121. For total above-water upwelling radiance ( L t ), the difference was &lt;3.5% with an RMS &lt;0.009 mWm\u22122 nm\u22121 sr\u22121. For remote-sensing reflectance ( R r s ), the differences between above-water TriOS RAMSES were &lt;3.5% and &lt;2.5% at 443 and 560 nm, respectively, and were &lt;7.5% for some systems at 665 nm. Seabird-Hyperspectral Surface Acquisition System (HyperSAS) sensors were on average within 3.5% at 443 nm, 1% at 560 nm, and 3% at 665 nm. The differences between the weighted mean of the above-water and in-water systems was &lt;15.8% across visible bands. A sensitivity analysis showed that E d accounted for the largest fraction of the variance in R r s , which suggests that minimizing the errors arising from this measurement is the most important variable in reducing the inter-group differences in R r s . The differences may also be due, in part, to using five of the above-water systems as a reference. To avoid this, in situ normalized water-leaving radiance ( L w n ) was therefore compared to AERONET-OC SeaPRiSM L w n as an alternative reference measurement. For the TriOS-RAMSES and Seabird-HyperSAS sensors the differences were similar across the visible spectra with 4.7% and 4.9%, respectively. The difference between SeaPRiSM L w n and two in-water systems at blue, green and red bands was 11.8%. This was partly due to temporal and spatial differences in sampling between the in-water and above-water systems and possibly due to uncertainties in instrument self-shading for one of the in-water measurements.<\/jats:p>","DOI":"10.3390\/rs12101587","type":"journal-article","created":{"date-parts":[[2020,5,18]],"date-time":"2020-05-18T02:43:42Z","timestamp":1589769822000},"page":"1587","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":49,"title":["Field Intercomparison of Radiometer Measurements for Ocean Colour Validation"],"prefix":"10.3390","volume":"12","author":[{"given":"Gavin","family":"Tilstone","sequence":"first","affiliation":[{"name":"Plymouth Marine Laboratory, Earth Observation Science and Applications, Plymouth PL1 3DH, UK"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3931-4675","authenticated-orcid":false,"given":"Giorgio","family":"Dall\u2019Olmo","sequence":"additional","affiliation":[{"name":"Plymouth Marine Laboratory, Earth Observation Science and Applications, Plymouth PL1 3DH, UK"},{"name":"National Centre for Earth Observations, Plymouth PL1 3DH, UK"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6066-1562","authenticated-orcid":false,"given":"Martin","family":"Hieronymi","sequence":"additional","affiliation":[{"name":"Institute of Coastal Research, Helmholtz-Zentrum Geesthacht (HZG), 21502 Geesthacht, Germany"}]},{"given":"Kevin","family":"Ruddick","sequence":"additional","affiliation":[{"name":"Royal Belgian Institute of Natural Sciences, 29 Rue Vautierstraat, 1000 Brussels, Belgium"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2847-8826","authenticated-orcid":false,"given":"Matthew","family":"Beck","sequence":"additional","affiliation":[{"name":"Royal Belgian Institute of Natural Sciences, 29 Rue Vautierstraat, 1000 Brussels, Belgium"}]},{"given":"Martin","family":"Ligi","sequence":"additional","affiliation":[{"name":"Tartu Observatory, University of Tartu, 61602 T\u00f5ravere, Estonia"}]},{"given":"Maycira","family":"Costa","sequence":"additional","affiliation":[{"name":"Geography Department at the University of Victoria, Victoria, BC V8P 5C2, Canada"}]},{"given":"Davide","family":"D\u2019Alimonte","sequence":"additional","affiliation":[{"name":"Center for Marine and Environmental Research CIMA, University of Algarve, 8005-139 Faro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5392-7457","authenticated-orcid":false,"given":"Vincenzo","family":"Vellucci","sequence":"additional","affiliation":[{"name":"Sorbonne Universit\u00e9, CNRS, Institut de la Mer de Villefranche, IMEV, F-06230 Villefranche-sur-Mer, France"}]},{"given":"Dieter","family":"Vansteenwegen","sequence":"additional","affiliation":[{"name":"Flanders Marine Institute (VLIZ), Wandelaarkaai 7, 8400 Ostend, Belgium"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3025-5517","authenticated-orcid":false,"given":"Astrid","family":"Bracher","sequence":"additional","affiliation":[{"name":"Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Department of Climate Sciences, D-27570 Bremerhaven, Germany"}]},{"given":"Sonja","family":"Wiegmann","sequence":"additional","affiliation":[{"name":"Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Department of Climate Sciences, D-27570 Bremerhaven, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7565-1244","authenticated-orcid":false,"given":"Joel","family":"Kuusk","sequence":"additional","affiliation":[{"name":"Tartu Observatory, University of Tartu, 61602 T\u00f5ravere, Estonia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0963-706X","authenticated-orcid":false,"given":"Viktor","family":"Vabson","sequence":"additional","affiliation":[{"name":"Tartu Observatory, University of Tartu, 61602 T\u00f5ravere, Estonia"}]},{"given":"Ilmar","family":"Ansko","sequence":"additional","affiliation":[{"name":"Tartu Observatory, University of Tartu, 61602 T\u00f5ravere, Estonia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3740-0772","authenticated-orcid":false,"given":"Riho","family":"Vendt","sequence":"additional","affiliation":[{"name":"Tartu Observatory, University of Tartu, 61602 T\u00f5ravere, Estonia"}]},{"given":"Craig","family":"Donlon","sequence":"additional","affiliation":[{"name":"European Space Agency, 2201 AZ Noordwijk, The Netherlands"}]},{"given":"T\u00e2nia","family":"Casal","sequence":"additional","affiliation":[{"name":"European Space Agency, 2201 AZ Noordwijk, The Netherlands"}]}],"member":"1968","published-online":{"date-parts":[[2020,5,16]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Vabson, V., Kuusk, J., Ansko, I., Vendt, R., Alikas, K., Ruddick, K., Ansper, A., Bresciani, M., Burmester, H., and Costa, M. (2019). Laboratory intercomparison of radiometers used for satellite validation in the 400\u2013900 nm range. Remote Sens., 11.","DOI":"10.3390\/rs11091101"},{"key":"ref_2","unstructured":"JCGM (2008). Guide to the Expression of Uncertainty in Measurement\u2014JCGM 100:2008 (GUM 1995 with Minor Corrections\u2014Evaluation of Measurement Data, Joint Committee for Guides in Metrology."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"527","DOI":"10.1016\/B978-0-12-417011-7.00016-7","article-title":"In Situ Measurement Strategies","volume":"Volume 47","author":"Zibordi","year":"2014","journal-title":"Experimental Methods in the Physical Sciences"},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Vabson, V., Kuusk, J., Ansko, I., Vendt, R., Alikas, K., Ansper, A., Bresciani, M., Burmeister, H., Costa, M., and D\u2019Alimonte, D. (2019). Field intercomparison of radiometers used for satellite validation in the 400\u2013900 nm range. Remote Sens., 11.","DOI":"10.3390\/rs11091129"},{"key":"ref_5","unstructured":"Fargion, G.S., and Mueller, J.L. (2000). Above-water radiance and remote sensing reflectance measurements and analysis protocols. Ocean Optics Protocols for Satellite Ocean Color Sensor Validation, National Aeronautical and Space Administration."},{"key":"ref_6","unstructured":"Tilstone, G.H., Moore, G.F., Sorensen, K., Doerffer, R., Rottgers, R., Ruddick, K.G., Jorgensen, P.V., and Pasterkamp, R. (2004). Regional Validation of MERIS Chlorophyll Products in North Sea Coastal Waters: REVAMP Protocols. ENVISAT Validation Workshop, European Space Agency. Available online: http:\/\/envisat.esa.int\/workshops\/mavt_2003\/."},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Ruddick, K.G., Voss, K., Boss, E., Castagna, A., Frouin, R., Gilerson, A., Hieronymi, M., Johnson, B.C., Kuusk, J., and Lee, Z. (2019). A Review of Protocols for Fiducial Reference Measurements of Water-leaving Radiance for the Validation of Satellite Remote Sensing Data over Water. Remote Sens., 11.","DOI":"10.3390\/rs11192198"},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Ruddick, K.G., Voss, K., Banks, A.C., Boss, E., Castagna, A., Frouin, R., Hieronymi, M., Jamet, C., Johnson, B.C., and Kuusk, J. (2019). A Review of Protocols for Fiducial Reference Measurements of Downwelling Irradiance for the Validation of Satellite Remote Sensing Data over Water. Remote Sens., 11.","DOI":"10.3390\/rs11151742"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"486","DOI":"10.1175\/1520-0426(2002)019<0486:AEOAAI>2.0.CO;2","article-title":"An evaluation of above- and in-water methods for determining water leaving radiances","volume":"19","author":"Hooker","year":"2002","journal-title":"J. Atmos. Ocean. Tech."},{"key":"ref_10","unstructured":"Hooker, S.B., McLean, S., Sherman, J., Small, M., Lazin, G., Zibordi, G., and Brown, J.W. (2002). The Seventh SeaWiFS Intercalibration Round-Robin Experiment (SIRREX-7), March 1999. NASA Tech. Memo, NASA Goddard Space Flight Center. NASA\/TM-2002-206892\/VOL17."},{"key":"ref_11","unstructured":"Hooker, S.B., and Firestone, E.R. (1999). The fifth SeaWiFS Intercalibration Round Robin Experiment (SIRREX-5), July 1996; NASA Tech Memo. 1999-206892, NASA Goddard Space Flight Center."},{"key":"ref_12","unstructured":"Meister, G., Abel, P., McClain, C., Barnes, R., Fargion, G., Cooper, J., Davis, C., Korwan, D., Godin, M., and Maffione, R. (2002). The First SIMBIOS Radiometric Intercomparison (SIMRIC-1), April\u2013September 2001, National Aeronautics and Space Administration, Goddard Space Flight."},{"key":"ref_13","unstructured":"Meister, G., Abel, P., Carder, K., Chapin, A., Clark, D., Cooper, J., Davis, C., English, D., Fargion, G., and Feinholtz, M. (2003). The Second SIMBIOS Radiometric Intercomparison (SIMRIC-2), March\u2013November 2002, NASA Technical Memorandum; National Aeronautics and Space Administration, Goddard Space Flight Center."},{"key":"ref_14","unstructured":"Tilstone, G.H., Moore, G.F., Sorensen, K., Doerffer, R., Rottgers, R., Ruddick, K.G., and Pasterkamp, R. (2003, January 20\u201324). Protocols for the validation of MERIS products in Case 2 waters. Proceedings of the ENVISAT MAVT Conference, Frascatti, Italy."},{"key":"ref_15","unstructured":"Moore, G.F., Icely, J.D., and Kratzer, S. (July, January 28). Field Inter-comparison and validation of in-water radiometer and sun photometers for MERIS validation. Proceedings of the ESA Living Planet Symposium, Bergen, Norway."},{"key":"ref_16","unstructured":"Hooker, S.B., and Firesetone, E.R. (2002). The Eighth SeaWiFS Intercalibration Round-Robin Exercise (SIRREX-8), September\u2013December 2001. NASA Tech Memo. 2002-206892, NASA Goddard Space."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"567","DOI":"10.5194\/os-8-567-2012","article-title":"In situ determination of the remote sensing reflectance: An intercomparison","volume":"8","author":"Zibordi","year":"2012","journal-title":"Ocean Sci."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"7442","DOI":"10.1364\/AO.38.007442","article-title":"Estimation of the remote-sensing reflectance from above-surface measurements","volume":"38","author":"Mobley","year":"1999","journal-title":"Appl. Opt."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"4055","DOI":"10.1364\/AO.43.004055","article-title":"SIMBAD: A field radiometer for satellite ocean-color validation","volume":"43","author":"Deschamps","year":"2004","journal-title":"Appl. Opt."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"401","DOI":"10.1109\/TGRS.2003.821064","article-title":"An autonomous above-water system for the validation of ocean color radiance data","volume":"42","author":"Zibordi","year":"2004","journal-title":"IEEE Trans. Geosc. Rem. Sens."},{"key":"ref_21","unstructured":"Hooker, S.B., and Lazin, G. (2000). The SeaBOARR-99 Field Campaign, NASA."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"18","DOI":"10.5670\/oceanog.1990.03","article-title":"Avoiding ship-induced light-field perturbation in the determination of oceanic optical properties","volume":"3","author":"Waters","year":"1990","journal-title":"Oceanography"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"437","DOI":"10.3389\/fmars.2018.00437","article-title":"ProVal: A new autonomous profiling float for high quality radiometric measurements","volume":"5","author":"Leymarie","year":"2018","journal-title":"Front. Mar. Sci."},{"key":"ref_24","unstructured":"Clark, D.K., Yarbrough, M.A., Feinholz, M., Flora, S., Broenkow, W., Kim, Y.S., Johnson, B.C., Brown, S.W., Yuen, M., and Mueller, J.L. (2003). MOBY, a Radiometric Buoy for Performance Monitoring and Vicarious Calibration of Satellite Ocean Color Sensors: Measurement and Data Analysis Protocols, National Aeronautics and Space Administration, Goddard Space Flight. Chapter 2."},{"key":"ref_25","first-page":"177","article-title":"R\u00e9sultats exp\u00e9rimentaux concernant la p\u00e9n\u00e9tration de la lumi\u00e8re du jour dans les eaux M\u00e9diterran\u00e9ennes","volume":"17","author":"Morel","year":"1965","journal-title":"Cah. Oc\u00e9anograph."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"241","DOI":"10.1364\/AO.44.000241","article-title":"Normalized water-leaving radiance: Revisiting the influence of surface roughness","volume":"44","author":"Gordon","year":"2005","journal-title":"Appl. Opt."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"256","DOI":"10.1016\/j.asr.2002.12.004","article-title":"Solar irradiance reference spectra for two solar active levels","volume":"34","author":"Thuillier","year":"2004","journal-title":"Adv. Space Res."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"6289","DOI":"10.1364\/AO.41.006289","article-title":"Bidirectional reflectance of oceanic waters: Accounting for Raman emission and varying particle phase function","volume":"41","author":"Morel","year":"2002","journal-title":"Appl. Opt."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"1527","DOI":"10.1080\/01431160310001592544","article-title":"Bio-optical relationships for the northern Adriatic Sea","volume":"25","author":"Berthon","year":"2004","journal-title":"Int. J. Remote. Sens."},{"key":"ref_30","unstructured":"(2016). OLCI spectral response functions. Technical Guide, European Space Agency, ESRIN."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"2262","DOI":"10.1364\/OE.23.002262","article-title":"Band shifting for ocean color multi-spectral reflectance data","volume":"23","author":"Melin","year":"2015","journal-title":"Opt. Express"},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"L06617","DOI":"10.1029\/2006GL025778","article-title":"Comparison of SeaWiFS, MODIS and MERIS radiometric products at a coastal site","volume":"33","author":"Zibordi","year":"2006","journal-title":"Geophys. Res. Lett."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"2574","DOI":"10.1016\/j.rse.2009.07.013","article-title":"Validation of satellite ocean color primary products at optically complex coastal sites: Northern Adriatic Sea, Northern Baltic Proper and Gulf of Finland","volume":"113","author":"Zibordi","year":"2009","journal-title":"Remote Sens. Environ."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"1059","DOI":"10.1175\/1520-0426(2004)021<1059:AEODRR>2.0.CO;2","article-title":"An evaluation of depth resolution requirements for optical profiling in coastal waters","volume":"21","author":"Zibordi","year":"2004","journal-title":"J. Atmos. Ocean. Tech."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"1634","DOI":"10.1175\/2009JTECHO654.1","article-title":"AERONET-OC: A Network for the Validation of Ocean Color Primary Products","volume":"26","author":"Zibordi","year":"2009","journal-title":"J. Atmos. Ocean. Tech."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"808","DOI":"10.1175\/1520-0426(2002)019<0808:AAWRMF>2.0.CO;2","article-title":"Autonomous above\u2013water radiance measurement from an offshore platform: A. field assessment","volume":"19","author":"Zibordi","year":"2002","journal-title":"J. Atmos. Ocean. Tech."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"1492","DOI":"10.1175\/1520-0485(1997)027<1492:TASGCP>2.0.CO;2","article-title":"The Adriatic Sea general circulation. Part I: Air-sea interactions and water mass structure","volume":"27","author":"Artegiani","year":"1997","journal-title":"J. Phys. Oceanogr."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"3004","DOI":"10.1029\/2000JC000210","article-title":"Diagnostic and prognostic model studies of the Adriatic Sea general circulation: Seasonal variability","volume":"107","author":"Zavatarelli","year":"2002","journal-title":"J. Geophys. Res."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"5908","DOI":"10.1364\/OE.26.005908","article-title":"Effects of integration time on in-water radiometric profiles","volume":"26","author":"Zibordi","year":"2018","journal-title":"Opt. Express"},{"key":"ref_40","doi-asserted-by":"crossref","unstructured":"Uudeberg, K., Ansko, I., P\u00f5ru, G., Ansper, A., and Reinart, A. (2019). Using Optical Water Types to Monitor Changes in Optically Complex Inland and Coastal Waters. Remote Sens., 11.","DOI":"10.3390\/rs11192297"},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"A1045","DOI":"10.1364\/OE.24.0A1045","article-title":"Polarized reflectance and transmittance distribution functions of the ocean surface","volume":"24","author":"Hieronymi","year":"2016","journal-title":"Opt. Express"},{"key":"ref_42","unstructured":"Theis, A. (2009). Validation of MERIS, MODIS and SeaWiFS Level-2 Products with Ground Based in-situ Measurements in Atlantic Case 1 Waters. [Mater\u2019s Thesis, University of Bremen]. Available online: https:\/\/epic.awi.de\/21447\/1\/The2009a.pdf."},{"key":"ref_43","doi-asserted-by":"crossref","unstructured":"Ruddick, K., Cauwer, V.D., and van Mol, B. (2005, January 23). Use of the near infrared similarity spectrum for the quality control of remote sensing data. Proceedings of the SPIE International conference on Remote Sensing of the Coastal Oceanic Environment, San Diego, CA, USA.","DOI":"10.1117\/12.615152"},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"1167","DOI":"10.4319\/lo.2006.51.2.1167","article-title":"Seaborne measurements of near infra-red water leaving reflectance: The similarity spectrum for turbid waters","volume":"51","author":"Ruddick","year":"2006","journal-title":"Limnol. Oceanogr."},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"82","DOI":"10.1016\/j.rse.2016.05.005","article-title":"Underway spectrophotometry along the Atlantic Meridional Transect reveals remarkable performance in satellite chlorophyll data","volume":"183","author":"Brewin","year":"2016","journal-title":"Remote Sens. Environ."},{"key":"ref_46","doi-asserted-by":"crossref","unstructured":"Carswell, T., Costa, M., Young, E., Komick, N., Gower, J., and Sweeting, R. (2017). Evaluation of MODIS-Aqua Atmospheric Correction and Chlorophyll Products of Western North American Coastal Waters Based on 13 Years of Data. Remote Sens., 9.","DOI":"10.3390\/rs9101063"},{"key":"ref_47","doi-asserted-by":"crossref","unstructured":"Vansteenwegen, D., Ruddick, K., Cattrijsse, A., Vanhellemont, Q., and Beck, M. (2019). The Pan-and-Tilt Hyperspectral Radiometer System (PANTHYR) for Autonomous Satellite Validation Measurements\u2014Prototype Design and Testing. Remote Sens., 11.","DOI":"10.3390\/rs11111360"},{"key":"ref_48","unstructured":"Morrow, J.H., Hooker, S.B., Booth, C.R., Bernhard, G., Lind, R.N., and Brown, J.W. (2010). Advances in Measuring the Apparent Optical Properties (AOPs) of Optically Complex Waters, NASA. NASA\/TM-2010-215856."},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"3609","DOI":"10.5194\/bg-8-3609-2011","article-title":"Bio-optical provinces in the eastern Atlantic Ocean and their biogeographical relevance","volume":"8","author":"Taylor","year":"2011","journal-title":"Biogeosciences"},{"key":"ref_50","unstructured":"Mueller, J.L., Giulietta, S., Fargion, C., and McClain, R. (2003). Ocean Optics Protocols For Satellite Ocean Color Sensor Validation, Biogeochemical and Bio-Optical Measurements and Data Analysis Protocols National Aeronautical and Space Administration. Revision 5."},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"477","DOI":"10.1023\/A:1021213331788","article-title":"Probability Distribution of Surface Wave Slope Derived Using Sun Glitter Images from Geostationary Meteorological Satellite and Surface Vector Winds from Scatterometers","volume":"58","author":"Ebuchi","year":"2002","journal-title":"J. Oceanogr."},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"A446","DOI":"10.1364\/OE.24.00A446","article-title":"Experimental evaluation of theoretical sea surface reflectance factors relevant to above-water radiometry","volume":"24","author":"Zibordi","year":"2016","journal-title":"Opt. Express"},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"4828","DOI":"10.1364\/AO.54.004828","article-title":"Polarized reflectance and transmittance properties of windblown sea surfaces","volume":"54","author":"Mobley","year":"2015","journal-title":"Appl. Opt."},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"139","DOI":"10.5194\/os-11-139-2015","article-title":"Using empirical orthogonal functions derived from remote sensing reflectance for the prediction of phytoplankton pigment concentrations","volume":"11","author":"Bracher","year":"2015","journal-title":"Ocean Sci."},{"key":"ref_55","unstructured":"Mueller, J.L., Fargion, G.S., and McClain, C.R. (2003). Ocean Optics Protocols for Satellite Ocean Color Sensor Validation, NASA Goddard Space Flight Center. Revision 4; Radiometric Measurements and Data Analysis Protocols."},{"key":"ref_56","unstructured":"Zibordi, G., Voss, K.J., Johnson, B.C., and Mueller, J.L. (2019). Protocols for Satellite Ocean Colour Data Validation: In situ Optical Radiometry. IOCCG Ocean Optics and Biogeochemistry Protocols for Satellite Ocean Colour Sensor Validation, IOCCG."},{"key":"ref_57","first-page":"328","article-title":"Absorption, scattering, and remote sensing reflectance relationships in coastal waters: Testing a new inversion algorithm","volume":"17","author":"Gould","year":"2001","journal-title":"J. Coastal Res."},{"key":"ref_58","doi-asserted-by":"crossref","first-page":"4254","DOI":"10.1364\/AO.43.004254","article-title":"Above-Water Radiometry in shallow coastal waters","volume":"43","author":"Hooker","year":"2004","journal-title":"Appl. Opt."},{"key":"ref_59","doi-asserted-by":"crossref","first-page":"4511","DOI":"10.5194\/bg-10-4511-2013","article-title":"Apparent optical properties of the Canadian Beaufort Sea\u2014Part 2: The 1% and 1 cm perspective in deriving and validating AOP data products","volume":"10","author":"Hooker","year":"2013","journal-title":"Biogeosciences"},{"key":"ref_60","doi-asserted-by":"crossref","first-page":"7163","DOI":"10.1029\/2000JC000319","article-title":"Bio-optical properties of oceanic waters: A reappraisal","volume":"106","author":"Morel","year":"2001","journal-title":"J. Geophys. Res."},{"key":"ref_61","doi-asserted-by":"crossref","first-page":"1657","DOI":"10.4319\/lo.1990.35.8.1657","article-title":"A simple spectral solar irradiance model for cloudless maritime atmospheres","volume":"35","author":"Gregg","year":"1990","journal-title":"Limnol. Oceanogr."},{"key":"ref_62","doi-asserted-by":"crossref","first-page":"171","DOI":"10.5194\/bg-5-171-2008","article-title":"Relationships between the surfaceconcentration of particulate organic carbon and optical properties in the eastern South Pacific and eastern Atlantic Oceans","volume":"5","author":"Stramski","year":"2008","journal-title":"Biogeosciences"},{"key":"ref_63","doi-asserted-by":"crossref","first-page":"1289","DOI":"10.1016\/j.jqsrt.2010.01.036","article-title":"An improved high-resolution solar reference spectrum for earth\u2019s atmosphere measurements in the ultraviolet, visible, and near infrared","volume":"111","author":"Chance","year":"2010","journal-title":"J. Quant. Spectrosc. Radiat. Transf."},{"key":"ref_64","doi-asserted-by":"crossref","first-page":"303","DOI":"10.3354\/meps161303","article-title":"Improved resolution of mono-and divinyl chlorophylls a and b and zeaxanthin and lutein in phytoplankton extracts using reverse phase C-8 HPLC","volume":"161","author":"Barlow","year":"1997","journal-title":"Mar. Ecol. Prog. Ser."},{"key":"ref_65","doi-asserted-by":"crossref","first-page":"899","DOI":"10.1016\/j.dsr2.2008.09.017","article-title":"Phytoplankton pigments and functional types in the Atlantic Ocean: A decadal assessment, 1995\u20132005","volume":"56","author":"Aiken","year":"2009","journal-title":"Deep-Sea Res. Part II Top. Stud. Oceanogr."},{"key":"ref_66","doi-asserted-by":"crossref","first-page":"187","DOI":"10.1088\/0026-1394\/50\/3\/187","article-title":"Cosine error for a class of hyperspectral irradiance sensors","volume":"50","author":"Mekaoui","year":"2013","journal-title":"Metrologia"},{"key":"ref_67","unstructured":"Sea-Bird Scientific (2020, May 13). Specifications for HyperOCR Radiometer. Available online: https:\/\/www.seabird.com\/hyperspectral-radiometers\/hyperocr-radiometer\/family?productCategoryId=54627869935."},{"key":"ref_68","unstructured":"(2020, May 13). TriOS. RAMSES Technische Spezifikationen, TriOS Mess- und Datentechnik. Available online: https:\/\/www.trios.de\/ramses.html."},{"key":"ref_69","doi-asserted-by":"crossref","first-page":"1795","DOI":"10.1175\/JTECH-D-17-0048.1","article-title":"Response to Temperature of a Class of In Situ Hyperspectral Radiometers","volume":"34","author":"Zibordi","year":"2017","journal-title":"J. Atmos. Ocean. Technol."},{"key":"ref_70","doi-asserted-by":"crossref","first-page":"13801","DOI":"10.1364\/OE.391470","article-title":"Biases from incorrect reflectance convolution","volume":"28","author":"Burggraaff","year":"2020","journal-title":"Opt. Express"},{"key":"ref_71","doi-asserted-by":"crossref","first-page":"491","DOI":"10.4319\/lo.1992.37.3.0491","article-title":"Self-shading of in-water optical measurements","volume":"37","author":"Gordon","year":"1992","journal-title":"Limnol. Oceanogr."},{"key":"ref_72","doi-asserted-by":"crossref","first-page":"A878","DOI":"10.1364\/OE.27.00A878","article-title":"Spectral assessment of deployment platform perturbations on above-water radiometry","volume":"27","author":"Talone","year":"2019","journal-title":"Opt. Express"},{"key":"ref_73","doi-asserted-by":"crossref","unstructured":"Bia\u0142ek, A., Douglas, S., Kuusk, J., Ansko, I., Vabson, V., Vendt, R., and Casal, T. (2020). Example of Monte Carlo Method Uncertainty Evaluation for Above-Water Ocean Colour Radiometry. Remote Sens., 12.","DOI":"10.3390\/rs12050780"},{"key":"ref_74","doi-asserted-by":"crossref","unstructured":"Alikas, K., Vabson, V., Ansko, I., Tilstone, G.H., Dall\u2019Olmo, G., Vendt, R., Donlon, C., and Casal, T. (2020). Comparison of above-water Seabird and TriOS radiometers along an Atlantic Meridional Transect. Remote Sens., (in revision).","DOI":"10.3390\/rs12101669"}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/12\/10\/1587\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T09:29:33Z","timestamp":1760174973000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/12\/10\/1587"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020,5,16]]},"references-count":74,"journal-issue":{"issue":"10","published-online":{"date-parts":[[2020,5]]}},"alternative-id":["rs12101587"],"URL":"https:\/\/doi.org\/10.3390\/rs12101587","relation":{},"ISSN":["2072-4292"],"issn-type":[{"value":"2072-4292","type":"electronic"}],"subject":[],"published":{"date-parts":[[2020,5,16]]}}}