{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,19]],"date-time":"2026-02-19T21:30:56Z","timestamp":1771536656802,"version":"3.50.1"},"reference-count":22,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2022,3,9]],"date-time":"2022-03-09T00:00:00Z","timestamp":1646784000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100005416","name":"The Research Council of Norway","doi-asserted-by":"publisher","award":["223254"],"award-info":[{"award-number":["223254"]}],"id":[{"id":"10.13039\/501100005416","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100005416","name":"The Research Council of Norway","doi-asserted-by":"publisher","award":["276730"],"award-info":[{"award-number":["276730"]}],"id":[{"id":"10.13039\/501100005416","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100005416","name":"The Research Council of Norway","doi-asserted-by":"publisher","award":["245923"],"award-info":[{"award-number":["245923"]}],"id":[{"id":"10.13039\/501100005416","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>We describe an Underwater Hyperspectral Imager (UHI) deployed on an instrument-carrying platform consisting of two interconnected mini-ROVs (Remotely Operated Vehicle) for the mapping and monitoring of Arctic macroalgal habitats in Kongsfjorden (Svalbard) during the Polar Night. The mini-ROV-UHI system is easy to transport, assemble and deploy from shore, even under the dark, icy and cold conditions of the Arctic Polar Night. The system can be operated by two persons, keeping the operational costs low. In vivo hyperspectral reflectance of collected specimens of brown, red and green macroalgae was measured with a spectrometer in the lab to provide a spectral library for supervised pigment group classification based on UHI photomosaics. The in situ UHI-photomosaics provided detailed information of the areal coverage of the seafloor substrate (16%), as well as brown (51% habitat cover), red (18%), and green (14%) macroalgae, with spatial resolution in the range of cm and spectral resolution of 2 nm. The collected specimens from the mapped area were also used for species identification and health state evaluation. This innovative UHI sampling method provides significant information about macroalgal distribution and physiology, and due to its flexibility in terms of deployment, it is applicable to a variety of environments.<\/jats:p>","DOI":"10.3390\/rs14061325","type":"journal-article","created":{"date-parts":[[2022,3,10]],"date-time":"2022-03-10T02:10:35Z","timestamp":1646878235000},"page":"1325","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":19,"title":["Underwater Hyperspectral Imaging of Arctic Macroalgal Habitats during the Polar Night Using a Novel Mini-ROV-UHI Portable System"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0993-0696","authenticated-orcid":false,"given":"Natalie","family":"Summers","sequence":"first","affiliation":[{"name":"Centre for Autonomous Marine Operations and Systems (AMOS), Trondheim Biological Station, Department of Biology, Norwegian University of Science and Technology (NTNU), 7018 Trondheim, Norway"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2463-5903","authenticated-orcid":false,"given":"Geir","family":"Johnsen","sequence":"additional","affiliation":[{"name":"Centre for Autonomous Marine Operations and Systems (AMOS), Trondheim Biological Station, Department of Biology, Norwegian University of Science and Technology (NTNU), 7018 Trondheim, Norway"},{"name":"Department of Arctic Biology, University Centre in Svalbard (UNIS), 9170 Longyearbyen, Norway"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2152-4746","authenticated-orcid":false,"given":"Aksel","family":"Mogstad","sequence":"additional","affiliation":[{"name":"Centre for Autonomous Marine Operations and Systems (AMOS), Trondheim Biological Station, Department of Biology, Norwegian University of Science and Technology (NTNU), 7018 Trondheim, Norway"}]},{"given":"H\u00e5vard","family":"L\u00f8v\u00e5s","sequence":"additional","affiliation":[{"name":"Centre for Autonomous Marine Operations and Systems (AMOS), Department of Marine Technology, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway"}]},{"given":"Glaucia","family":"Fragoso","sequence":"additional","affiliation":[{"name":"Centre for Autonomous Marine Operations and Systems (AMOS), Trondheim Biological Station, Department of Biology, Norwegian University of Science and Technology (NTNU), 7018 Trondheim, Norway"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0900-5679","authenticated-orcid":false,"given":"J\u00f8rgen","family":"Berge","sequence":"additional","affiliation":[{"name":"Centre for Autonomous Marine Operations and Systems (AMOS), Trondheim Biological Station, Department of Biology, Norwegian University of Science and Technology (NTNU), 7018 Trondheim, Norway"},{"name":"Department of Arctic Biology, University Centre in Svalbard (UNIS), 9170 Longyearbyen, Norway"},{"name":"Faculty of Biosciences, Fisheries and Economics, Arctic University of Norway (UiT), 9037 Troms\u00f8, Norway"}]}],"member":"1968","published-online":{"date-parts":[[2022,3,9]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Johnsen, G., Volent, Z., Dierssen, H., Pettersen, R., Van Ardelan, M., S\u00f8reide, F., Fearns, P., Ludvigsen, M., and Moline, M. 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