{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,17]],"date-time":"2026-04-17T23:09:51Z","timestamp":1776467391053,"version":"3.51.2"},"reference-count":65,"publisher":"MDPI AG","issue":"21","license":[{"start":{"date-parts":[[2022,10,26]],"date-time":"2022-10-26T00:00:00Z","timestamp":1666742400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Japan Science and Technology Agency (JST) Support for Pioneering Research Initiated by the Next Generation (SPRING)","award":["JPMJSP2124"],"award-info":[{"award-number":["JPMJSP2124"]}]},{"name":"Japan Science and Technology Agency (JST) Support for Pioneering Research Initiated by the Next Generation (SPRING)","award":["ER2GCF103"],"award-info":[{"award-number":["ER2GCF103"]}]},{"name":"Japan Science and Technology Agency (JST) Support for Pioneering Research Initiated by the Next Generation (SPRING)","award":["ER3GCF104"],"award-info":[{"award-number":["ER3GCF104"]}]},{"name":"Japan Science and Technology Agency (JST) Support for Pioneering Research Initiated by the Next Generation (SPRING)","award":["JP19K20433"],"award-info":[{"award-number":["JP19K20433"]}]},{"name":"Japan Science and Technology Agency (JST) Support for Pioneering Research Initiated by the Next Generation (SPRING)","award":["JP22H05739"],"award-info":[{"award-number":["JP22H05739"]}]},{"DOI":"10.13039\/501100004020","name":"Japan Aerospace Exploration Agency (JAXA) Global Change Observation Mission (GCOM)","doi-asserted-by":"publisher","award":["JPMJSP2124"],"award-info":[{"award-number":["JPMJSP2124"]}],"id":[{"id":"10.13039\/501100004020","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004020","name":"Japan Aerospace Exploration Agency (JAXA) Global Change Observation Mission (GCOM)","doi-asserted-by":"publisher","award":["ER2GCF103"],"award-info":[{"award-number":["ER2GCF103"]}],"id":[{"id":"10.13039\/501100004020","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004020","name":"Japan Aerospace Exploration Agency (JAXA) Global Change Observation Mission (GCOM)","doi-asserted-by":"publisher","award":["ER3GCF104"],"award-info":[{"award-number":["ER3GCF104"]}],"id":[{"id":"10.13039\/501100004020","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004020","name":"Japan Aerospace Exploration Agency (JAXA) Global Change Observation Mission (GCOM)","doi-asserted-by":"publisher","award":["JP19K20433"],"award-info":[{"award-number":["JP19K20433"]}],"id":[{"id":"10.13039\/501100004020","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004020","name":"Japan Aerospace Exploration Agency (JAXA) Global Change Observation Mission (GCOM)","doi-asserted-by":"publisher","award":["JP22H05739"],"award-info":[{"award-number":["JP22H05739"]}],"id":[{"id":"10.13039\/501100004020","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Japan Society for the Promotion of Science (JSPS) KAKENHI","award":["JPMJSP2124"],"award-info":[{"award-number":["JPMJSP2124"]}]},{"name":"Japan Society for the Promotion of Science (JSPS) KAKENHI","award":["ER2GCF103"],"award-info":[{"award-number":["ER2GCF103"]}]},{"name":"Japan Society for the Promotion of Science (JSPS) KAKENHI","award":["ER3GCF104"],"award-info":[{"award-number":["ER3GCF104"]}]},{"name":"Japan Society for the Promotion of Science (JSPS) KAKENHI","award":["JP19K20433"],"award-info":[{"award-number":["JP19K20433"]}]},{"name":"Japan Society for the Promotion of Science (JSPS) KAKENHI","award":["JP22H05739"],"award-info":[{"award-number":["JP22H05739"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>The photochemical reflectance index (PRI) and the chlorophyll carotenoid index (CCI) are carotenoid-sensitive vegetation indices, which can monitor vegetation\u2019s photosynthetic activities. One unique satellite named \u201cGlobal Change Observation Mission-Climate (GCOM-C)\u201d is equipped with a sensor, \u201cSecond Generation Global Imager (SGLI)\u201d, which has the potential to frequently and simultaneously observe PRI and CCI over a wide swath. However, the observation accuracy of PRI and CCI derived from GCOM-C\/SGLI remains unclear in forests. Thus, we demonstrated their accuracy assessment by comparing them with in situ data. We collected in situ spectral irradiance data at four forest sites in Japan for three years. We statistically compared satellite PRI with in situ PRI, and satellite CCI with in situ CCI. From the obtained results, the satellite PRI showed poor agreement (the best: r=0.294 (p&lt;0.05)) and the satellite CCI showed good agreement (the best: r=0.911 (p&lt;0.001)). The greater agreement of satellite CCI is possibly because satellite CCI contained fewer outliers and satellite CCI was more resistant to small noise, compared to satellite PRI. Our results suggest that the satellite CCI is more suitable for practical use than the satellite PRI with the latest version (version 3) of GCOM-C\/SGLI\u2019s products.<\/jats:p>","DOI":"10.3390\/rs14215352","type":"journal-article","created":{"date-parts":[[2022,10,26]],"date-time":"2022-10-26T07:17:48Z","timestamp":1666768668000},"page":"5352","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Accuracy Assessment of Photochemical Reflectance Index (PRI) and Chlorophyll Carotenoid Index (CCI) Derived from GCOM-C\/SGLI with In Situ Data"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7855-827X","authenticated-orcid":false,"given":"Taiga","family":"Sasagawa","sequence":"first","affiliation":[{"name":"Graduate School of Science and Technology, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba 305-8572, Ibaraki, Japan"},{"name":"Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, Central 7, 1-1-1 Higashi, Tsukuba 305-8567, Ibaraki, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7401-0621","authenticated-orcid":false,"given":"Tomoko Kawaguchi","family":"Akitsu","sequence":"additional","affiliation":[{"name":"Earth Observation Research Center, Japan Aerospace Exploration Agency, 2-1-1 Sengen, Tsukuba 305-8505, Ibaraki, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Reiko","family":"Ide","sequence":"additional","affiliation":[{"name":"Earth System Division, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-8506, Ibaraki, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1321-2841","authenticated-orcid":false,"given":"Kentaro","family":"Takagi","sequence":"additional","affiliation":[{"name":"Teshio Experimental Forest, Field Science Center for Northern Biosphere, Hokkaido University, 131 Toikanbetsu, Horonobe 098-2943, Hokkaido, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9466-5385","authenticated-orcid":false,"given":"Satoru","family":"Takanashi","sequence":"additional","affiliation":[{"name":"Kansai Research Center, Forestry and Forest Products Research Institute, 68 Nagai-kyutaro, Momoyama-cho, Fushimi-ku, Kyoto 612-0855, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3161-1539","authenticated-orcid":false,"given":"Tatsuro","family":"Nakaji","sequence":"additional","affiliation":[{"name":"Uryu Experimental Forest, Field Science Center for Northern Biosphere, Hokkaido University, Moshiri, Horokanai, Uryu 074-0741, Hokkaido, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2646-6805","authenticated-orcid":false,"given":"Kenlo Nishida","family":"Nasahara","sequence":"additional","affiliation":[{"name":"Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba 305-8572, Ibaraki, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,10,26]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1007\/BF00317336","article-title":"Remote sensing of the xanthophyll cycle and chlorophyll fluorescence in sunflower leaves and canopies","volume":"85","author":"Gamon","year":"1990","journal-title":"Oecologia"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"35","DOI":"10.1016\/0034-4257(92)90059-S","article-title":"A narrow-waveband spectral index that tracks diurnal changes in photosynthetic efficiency","volume":"41","author":"Gamon","year":"1992","journal-title":"Remote Sens. 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