{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T17:39:17Z","timestamp":1777484357205,"version":"3.51.4"},"reference-count":26,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2019,12,23]],"date-time":"2019-12-23T00:00:00Z","timestamp":1577059200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>The Second Generation Global Imager (SGLI) on Global Change Observation Mission\u2013Climate (GCOM-C) satellite empowers surface and atmospheric measurements related to the carbon cycle and radiation budget, with two radiometers of Visible and Near Infrared Radiometer (SGLI-VNR) and Infrared Scanning Radiometer (SGLI-IRS) that perform a wide-band (380 nm\u201312 \u00b5m) optical observation not only with as wide as a 1150\u20131400 km field of view (FOV), but also with as high as 0.25\u20130.5 km resolution. Additionally, polarization and along-track slant view observations are quite characteristic of SGLI. It is important to calibrate radiometers to provide the sensor data records for more than 28 standard products and 23 research products including clouds, aerosols, ocean color, vegetation, snow and ice, and other applications. In this paper, the radiometric model and the first results of on-board calibrations on the SGLI-VNR, which include weekly solar and light-emitting diode (LED) calibration and monthly lunar calibration, will be described. Each calibration data was obtained with corrections, where beta angle correction and avoidance of reflection from multilayer insulation (MLI) were applied for solar calibration; LED temperature correction was performed for LED calibration; and the GIRO (GSICS (Global Space-based Inter-Calibration System) Implementation of the ROLO (RObotic Lunar Observatory) model) model was used for lunar calibration. Results show that the inter-comparison of the relative degradation amount between these three calibrations agreed to within 1% or less.<\/jats:p>","DOI":"10.3390\/rs12010069","type":"journal-article","created":{"date-parts":[[2019,12,24]],"date-time":"2019-12-24T05:56:15Z","timestamp":1577166975000},"page":"69","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Radiometric Model and Inter-Comparison Results of the SGLI-VNR On-Board Calibration"],"prefix":"10.3390","volume":"12","author":[{"given":"Tomoyuki","family":"Urabe","sequence":"first","affiliation":[{"name":"Japan Aerospace Exploration Agency (JAXA), Tsukuba, Ibaraki 305-8505, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaoxiong","family":"Xiong","sequence":"additional","affiliation":[{"name":"National Aeronautics and Space Administration (NASA), Greenbelt, MD 20771, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Taichiro","family":"Hashiguchi","sequence":"additional","affiliation":[{"name":"Remote Sensing Technology Center of Japan (RESTEC), Minato, Tokyo 105-0001, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shigemasa","family":"Ando","sequence":"additional","affiliation":[{"name":"Japan Aerospace Exploration Agency (JAXA), Tsukuba, Ibaraki 305-8505, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yoshihiko","family":"Okamura","sequence":"additional","affiliation":[{"name":"Japan Aerospace Exploration Agency (JAXA), Tsukuba, Ibaraki 305-8505, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kazuhiro","family":"Tanaka","sequence":"additional","affiliation":[{"name":"Japan Aerospace Exploration Agency (JAXA), Tsukuba, Ibaraki 305-8505, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2019,12,23]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"717","DOI":"10.1109\/JPROC.2009.2036869","article-title":"Global Change Observation Mission (GCOM) for Monitoring Carbon, Water Cycles, and Climate Change","volume":"98","author":"Imaoka","year":"2010","journal-title":"Proc. IEEE"},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Uchikata, T., Tanaka, K., Okamura, Y., Tsuida, S., and Amano, T. (2014). Proto Flight Model (PFM) performance and development status of Visible and Near Infrared Radiometer (VNR) on the Second-generation Global Imager (SGLI). Proc. SPIE, 9264.","DOI":"10.1117\/12.2068558"},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Sakashita, T., Tsuida, S., Amano, T., Shiratama, K., and Tanaka, K. (2016). Proto Flight Model (PFM) development status of visible and near-infrared radiometer (VNR) on the Second-generation Global Imager (SGLI). Proc. SPIE, 9881.","DOI":"10.1117\/12.2222504"},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Tanaka, K., Okamura, Y., Amano, T., Hosokawa, T., and Uchikata, T. (2014). The development status of Second Generation Global Imager (SGLI), Infrared Scanning Radiometer (SGLI-IRS). Proc. SPIE, 9264.","DOI":"10.1117\/12.2073597"},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Tanaka, K., Amano, T., Uchikata, T., and Sakashita, T. (2016). Early test results of proto-flight test of Second Generation Global Imager (SGLI) Infrared Scanning Radiometer (IRS). Proc. SPIE, 9881.","DOI":"10.1117\/12.2224732"},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Okamura, Y., Tanaka, K., Amano, T., Shiratama, K., and Hosokawa, T. (2015). Development and pre-launch test status of Second Generation Global Imager (SGLI). Proc. SPIE, 9639.","DOI":"10.1117\/12.2193387"},{"key":"ref_7","unstructured":"Urabe, T., Ando, S., Okamura, Y., Tanaka, K., Mokuno, M., Amano, Y., Shiratama, K., and Yoshida, J. (2017). Pre-launch instrument characterization results and in-orbit verification plan of GCOM-C\/SGLI. Int. Soc. Opt. Photonics, 10423."},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Urabe, T., Okamura, Y., Tanaka, K., and Mokuno, M. (2018). In-orbit commissioning activities results of GCOM-C \/SGLI. Int. Soc. Opt. Photonics, 10785.","DOI":"10.1117\/12.2325572"},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Tanaka, K., Okamura, Y., Mokuno, M., Amano, T., and Yoshida, J. (2018). First year on-orbit calibration activities of SGLI on GCOM-C satellite. Proc. SPIE, 10781.","DOI":"10.1117\/12.2324703"},{"key":"ref_10","unstructured":"Barnes, R.A., and Holmes, A.W. (1993, January 11\u201316). Overview of the SeaWiFS ocean sensor. Proceedings of the Sensor Systems for the Early Earth Observing System Platforms, Orlando, FL, USA."},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Baudin, G., Matthews, S., Bessudo, R., and Bezy, J.-L. (1996, January 4\u20139). Medium-Resolution Imaging Spectrometer (MERIS) calibration sequence. Proceedings of the Imaging Spectrometry II, Denver, CO, USA.","DOI":"10.1117\/12.258061"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"286","DOI":"10.1175\/1520-0426(1996)013<0286:TMCP>2.0.CO;2","article-title":"The MISR calibration program","volume":"13","author":"Bruegge","year":"1996","journal-title":"J. Atmos. Ocean Technol."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"274","DOI":"10.1175\/1520-0426(1996)013<0274:MCABRO>2.0.CO;2","article-title":"MODIS calibration: A brief review of the strategy for the At-launch calibration approach","volume":"13","author":"Guenther","year":"1996","journal-title":"J. Atmos. Ocean Technol."},{"key":"ref_14","first-page":"66","article-title":"Absolute calibration of the SPOT-1 HRV cameras","volume":"660","author":"Begni","year":"1986","journal-title":"SPIE"},{"key":"ref_15","first-page":"853","article-title":"Radiometric calibration of Landsat","volume":"63","author":"Thome","year":"1997","journal-title":"Photogramm. Eng. Remote Sens."},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Stone, T.C. (2008, January 10\u201314). Radiometric calibration stability and inter-calibration of solar-band instruments in orbit using the moon. Proceedings of the Earth Observing Systems XIII, San Diego, CA, USA.","DOI":"10.1117\/12.795227"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"120","DOI":"10.1364\/AO.50.000120","article-title":"Cross calibration of SeaWiFS and MODIS using on-orbit observations of the moon","volume":"50","author":"Eplee","year":"2011","journal-title":"Appl. Opt."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"778","DOI":"10.1109\/LGRS.2008.2005591","article-title":"Inter-comparison of On-orbit Calibration Consistency between Terra and Aqua MODIS Reflective Solar Bands Using the Moon","volume":"5","author":"Xiong","year":"2008","journal-title":"IEEE Geosci. Remote Sens. Lett."},{"key":"ref_19","doi-asserted-by":"crossref","unstructured":"Hashiguchi, T., Okamura, Y., Tanaka, K., Nakajima, Y., Suzuki, K., Sakashita, T., and Amano, T. (2016). Radiometric performance of Second-generation Global Imager (SGLI) using integrating spheres. Proc. SPIE, 10000.","DOI":"10.1117\/12.2241955"},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Hilsenrath, E., Herzig, H., Williams, D.E., Bruegge, C.J., and Stiegman, A.E. (1993, January 11\u201316). Effects of space shuttle flight on the reflectance characteristics of diffusers in the NIR, VIS, and UV. Proceedings of the Passive Materials for Optical Elements II, San Diego, CA, USA.","DOI":"10.1117\/12.165219"},{"key":"ref_21","first-page":"616","article-title":"Phase 1. Analysis of spectralon(R) material for use in on-board calibration systems for the medium resolution imaging spectrometer (MERIS)","volume":"2210","author":"Petroy","year":"1994","journal-title":"SPIE"},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Wagner, S.C., Hewison, T., Stone, T., Lacherade, S., Fougnie, B., and Xiong, X. (2015, January 21\u201324). A summary of the joint GSICS\u2014CEOS\/IVOS lunar calibration workshop: Moving towards intercalibration using the Moon as a transfer target. Proceedings of the Sensors, Systems, and Next-Generation Satellites XIX, Toulouse, France.","DOI":"10.1117\/12.2193161"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"2887","DOI":"10.1086\/430185","article-title":"The spectral irradiance of the moon","volume":"129","author":"Kieffer","year":"2005","journal-title":"Astron. J."},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Urabe, T., Xiong, X., Hashiguchi, T., Ando, S., Okamura, Y., Tanaka, K., and Mokuno, M. (August, January 28). Lunar calibration inter-comparison of SGLI, MODIS and VIIRS. Proceedings of the IGARSS 2018\u20142018 IEEE International Geoscience and Remote Sensing Symposium, Yokohama, Japan.","DOI":"10.1109\/IGARSS.2019.8897892"},{"key":"ref_25","doi-asserted-by":"crossref","unstructured":"Xiong, X., Lacherade, S., Lebegue, L., Fougnie, B., Angal, A., Wang, Z., and Aznay, O. (2014, January 22\u201325). Comparison of MODIS and PLEIADES Lunar observations. Proceedings of the Sensors, Systems, and Next-Generation Satellites XVIII, Amsterdam, The Netherlands.","DOI":"10.1117\/12.2067442"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"16","DOI":"10.1088\/0067-0049\/221\/1\/16","article-title":"Multi-band polarimetry of the lunar surface. I. Global properties","volume":"221","author":"Jeong","year":"2015","journal-title":"Astrophys. J. Suppl. Ser."}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/12\/1\/69\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T13:45:04Z","timestamp":1760190304000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/12\/1\/69"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019,12,23]]},"references-count":26,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2020,1]]}},"alternative-id":["rs12010069"],"URL":"https:\/\/doi.org\/10.3390\/rs12010069","relation":{},"ISSN":["2072-4292"],"issn-type":[{"value":"2072-4292","type":"electronic"}],"subject":[],"published":{"date-parts":[[2019,12,23]]}}}