{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,30]],"date-time":"2025-11-30T02:48:57Z","timestamp":1764470937437,"version":"build-2065373602"},"reference-count":30,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2018,8,22]],"date-time":"2018-08-22T00:00:00Z","timestamp":1534896000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["41401417"],"award-info":[{"award-number":["41401417"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"the Youth Talent Fund","award":["201802QT006"],"award-info":[{"award-number":["201802QT006"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>The FengYun-3 (FY-3) Visible Infrared Radiometer (VIRR), along with its predecessor, the Multispectral Visible Infrared Scanning Radiometer (MVISR), onboard the FY-1C and FY-1D, has collected continuous daily global observations for 18 years. Achieving accurate and consistent calibration for VIRR reflective solar bands (RSBs) has been challenging, as there is no onboard calibrator and the frequency of in situ vicarious calibration is limited. In this study, a new set of reflectance calibration coefficients were derived for RSBs of the FY-3A, FY-3B, and FY-3C VIRRs using a multisite (MST) calibration method. This method is an extension of a previous MST calibration method, which relies on radiative transfer modeling over the multiple stable earth sites, and no synchronous in situ measurements are needed; hence, it can be used to update the VIRR calibration on a daily basis. The on-orbit radiometric changes of the VIRR onboard the FY-3 series were assessed based on analyses of new sets of calibration slopes. Then, all recalibrated VIRR reflectance data over Libya 4, the most frequently used stable Earth site, were compared with those provided from the Level 1B (L1B) product. Additional validation was performed by comparing the recalibrated VIRR data with those derived from radiative transfer simulations using measurements from automatic calibration instruments in Dunhuang. The results indicate that the radiometric response changes of the VIRRs onboard FY-3A and FY-3B were larger than those of FY-3C VIRR and were wavelength dependent. The current approach can provide consistent VIRR reflectances across different FY-3 satellite platforms. After recalibration, differences in top-of-atmosphere (TOA) reflectance data across different VIRRs during the whole lifetime decreased from 5\u201310% to less than 3%. The comparison with the automatic calibration method indicates that MST calibration shows good accuracy and lower temporal oscillations.<\/jats:p>","DOI":"10.3390\/rs10091336","type":"journal-article","created":{"date-parts":[[2018,8,23]],"date-time":"2018-08-23T03:00:46Z","timestamp":1534993246000},"page":"1336","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Consistent Calibration of VIRR Reflective Solar Channels Onboard FY-3A, FY-3B, and FY-3C Using a Multisite Calibration Method"],"prefix":"10.3390","volume":"10","author":[{"given":"Ling","family":"Wang","sequence":"first","affiliation":[{"name":"Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, China Meteorological Administration, Beijing 100081, China"},{"name":"National Satellite Meteorological Center, China Meteorological Administration, Beijing 100081, China"}]},{"given":"Xiuqing","family":"Hu","sequence":"additional","affiliation":[{"name":"Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, China Meteorological Administration, Beijing 100081, China"},{"name":"National Satellite Meteorological Center, China Meteorological Administration, Beijing 100081, China"}]},{"given":"Lin","family":"Chen","sequence":"additional","affiliation":[{"name":"Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, China Meteorological Administration, Beijing 100081, China"},{"name":"National Satellite Meteorological Center, China Meteorological Administration, Beijing 100081, China"}]},{"given":"Lingli","family":"He","sequence":"additional","affiliation":[{"name":"National Satellite Meteorological Center, China Meteorological Administration, Beijing 100081, China"},{"name":"Chinese academy of meteorological science, China Meteorological Administration, Beijing 100081, China"}]}],"member":"1968","published-online":{"date-parts":[[2018,8,22]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2884","DOI":"10.3390\/rs6042884","article-title":"Assessment and correction of on-orbit radiometric calibration for FY-3 VIRR thermal infrared channels","volume":"6","author":"Xu","year":"2014","journal-title":"Remote Sens."},{"key":"ref_2","first-page":"2966","article-title":"Post launch site calibration of visible and near-infrared channels of FY-3A visible and infrared radiometers","volume":"17","author":"Li","year":"2009","journal-title":"Opt. Precis. Eng."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"566","DOI":"10.5589\/m10-087","article-title":"Characterization of CRCS Dunhuag test site and vicarious calibration utilization for Fengyun (FY) series sensors","volume":"36","author":"Hu","year":"2010","journal-title":"Can. J. Remote Sens."},{"key":"ref_4","first-page":"1869","article-title":"On-orbit response variation analysis of FY-3 MERSI reflective solar bands based on Dunhuang site calibration","volume":"32","author":"Sun","year":"2012","journal-title":"Spectrosc. Spectr. Anal."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"1327","DOI":"10.3390\/rs6021327","article-title":"Absolute calibration of optical satellite sensors using Libya 4 pseudo invariant calibration site","volume":"6","author":"Mishra","year":"2014","journal-title":"Remote Sens."},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Wu, A., Xiong, X., Cao, C., and Angal, A. (2018, August 19). Monitoring MODIS Calibration Stability of Visible and Near-IR Bands from Observed Top-of-Atmosphere BRDF-Normalized Reflectances over Libyan Desert and Antarctic Surfaces. Available online: https:\/\/doi.org\/10.1117\/12.795296.","DOI":"10.1117\/12.795296"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"2809","DOI":"10.3390\/rs6042809","article-title":"Initial stability assessment of S-NPP VIIRS reflective solar band calibration using invariant desert and deep convective cloud targets","volume":"6","author":"Bhatt","year":"2014","journal-title":"Remote Sens."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"3635","DOI":"10.1080\/0143116021000023907","article-title":"Calibration of visible and near-infrared channels of the NOAA-12 AVHRR using time series of observations over deserts","volume":"24","author":"Heidinger","year":"2003","journal-title":"Int. J. Remote Sens."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"6493","DOI":"10.1080\/01431161.2010.496472","article-title":"Deriving an inter-sensor consistent calibration for the AVHRR solar reflectance data record","volume":"31","author":"Heidinger","year":"2010","journal-title":"Int. J. Remote Sens."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"1405","DOI":"10.1109\/TGRS.2012.2220780","article-title":"Derive a MODIS-Based Calibration for the AVHRR Reflective Solar Channels of the NOAA KLM Operational Satellites","volume":"51","author":"Wu","year":"2013","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"6958","DOI":"10.3390\/rs5126958","article-title":"The application of deep convective clouds in the calibration and response monitoring of the reflective solar bands of FY-3A\/MERSI (Medium Resolution Spectral Imager)","volume":"5","author":"Chen","year":"2013","journal-title":"Remote Sens."},{"key":"ref_12","first-page":"51","article-title":"Impacts of spectral response differences on SNO calibration-study examples of FY-3A\/MERSI and EOS\/MODIS","volume":"2","author":"Wu","year":"2011","journal-title":"Remote Sens. Inf."},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Xu, N., Chen, L., Wu, R., Hu, X., Sun, L., and Zhang, P. (2014, January 26). In-Flight Intercalibration of FY-3C Visible Channels with AQUA MODIS. Proceedings of the SPIE, Earth Observing Missions and Sensors: Development, Implementation, and Characterization III, Beijing, China.","DOI":"10.1117\/12.2071185"},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Hu, X., Xu, N., Wu, R., Chen, L., Min, M., Wang, L., Xu, H., Sun, L., Yang, Z., and Zhang, P. (2014, January 26). Performance Assessment of FY-3C\/MERSI on Early Orbit. Proceedings of the SPIE, Earth Observing Missions and Sensors: Development, Implementation, and Characterization III, Beijing, China.","DOI":"10.1117\/12.2071190"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"4929","DOI":"10.1109\/TGRS.2012.2215613","article-title":"Multisite calibration tracking for FY-3A MERSI solar bands","volume":"50","author":"Sun","year":"2012","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_16","unstructured":"Chander, G., Christopherson, J.B., Stensaas, G.L., and Teillet, P.M. (2007, January 24\u201328). Online Catalogue of World-Wide Test Sites for the Post-Launch Characterization and Calibration of Optical Sensors. Proceedings of the International Astronautical Federation\u201458th International Astronautical Congress, Hyderabad, India."},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Teillet, P.M., Barsi, J.A., Chander, G., and Thome, K.J. (2007, January 5). Prime candidate Earth targets for the post-launch radiometric calibration of space-based optical imaging instruments. Proceedings of the SPIE, Earth Observing Systems XII, San Diego, CA, USA.","DOI":"10.1117\/12.733156"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"515","DOI":"10.1364\/AO.41.000515","article-title":"Calibration monitoring of the visible and near-infrared channels of the Along-Track Scanning Radiometer-2 by use of stable terrestrial sites","volume":"41","author":"Smith","year":"2002","journal-title":"Appl. Opt."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"925","DOI":"10.1016\/j.rse.2009.12.003","article-title":"Monitoring on-orbit calibration stability of the Terra MODIS and Landsat 7 ETM+ sensors using pseudo-invariant test sites","volume":"114","author":"Chander","year":"2010","journal-title":"Remote Sens. Environ."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"1360","DOI":"10.1109\/TGRS.2013.2243738","article-title":"Absolute radiometric calibration of Landsat using a pseudo invariant calibration site","volume":"51","author":"Helder","year":"2013","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_21","doi-asserted-by":"crossref","unstructured":"Ross, J.K. (1981). The Radiation Regime and Architecture of Plant Stands, Springer Science & Business Media.","DOI":"10.1007\/978-94-009-8647-3"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"276","DOI":"10.1109\/36.134078","article-title":"Geometric-optical bidirectional reflectance modeling of the discrete crown vegetation canopy: effect of crown shape and mutual shadowing","volume":"30","author":"Li","year":"1992","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_23","doi-asserted-by":"crossref","unstructured":"Gao, F., Schaaf, C., Strahler, A., Roesch, A., Lucht, W., and Dickinson, R. (2005). The MODIS BRDF\/Albedo Climate Modeling Grid Products and the Variability of Albedo for Major Global Vegetation Types. J. Geophys. Res., 110.","DOI":"10.1029\/2004JD005190"},{"key":"ref_24","first-page":"793","article-title":"Assessment of Radiometric Degradation of FY-3A MERSI Reflective Solar Bands using TOA Reflectance of Pseudo-Invariant Calibration Sites","volume":"11","author":"Kim","year":"2013","journal-title":"IEEE Geosci. Remote Sens. Lett."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"437","DOI":"10.1175\/1520-0477(1996)077<0437:TNYRP>2.0.CO;2","article-title":"The NCEP\/NCAR 40-year reanalysis project","volume":"77","author":"Kalnay","year":"1996","journal-title":"Bull. Am. Meteorol. Soc."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"6762","DOI":"10.1364\/AO.45.006762","article-title":"Validation of a vector version of the 6S radiative transfer code for atmospheric correction of satellite data. Part I: Path radiance","volume":"45","author":"Kotchenova","year":"2006","journal-title":"Appl. Opt."},{"key":"ref_27","unstructured":"Hubanks, P.A., King, M.D., Platnick, S.T., and Pincus, R.O. (2018, August 19). MODIS Atmosphere L3 Gridded Product Algorithm Theoretical Basis Document, Available online: https:\/\/eospso.nasa.gov\/sites\/default\/files\/atbd\/atbd_mod30.pdf."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"9296","DOI":"10.1002\/jgrd.50712","article-title":"Enhanced Deep Blue aerosol retrieval algorithm: The second generation","volume":"118","author":"Hsu","year":"2013","journal-title":"J. Geophys. Res. Atmos."},{"key":"ref_29","doi-asserted-by":"crossref","unstructured":"Zhang, Y., Li, X., Rong, Z., Zhang, L., Hu, X., and Ba, X. (2015, January 12). China radiometric calibration sites ground-based automatic observing systems for CAL\/VAL. Proceedings of the SPIE, Sensors, Systems, and Next-Generation Satellites XIX, Toulouse, France.","DOI":"10.1117\/12.2194633"},{"key":"ref_30","first-page":"1","article-title":"Automated radiation calibration method based on Dunhuang radiometric calibration site","volume":"37","author":"Lv","year":"2017","journal-title":"Acta Opt. Sin."}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/10\/9\/1336\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T15:20:19Z","timestamp":1760196019000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/10\/9\/1336"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2018,8,22]]},"references-count":30,"journal-issue":{"issue":"9","published-online":{"date-parts":[[2018,9]]}},"alternative-id":["rs10091336"],"URL":"https:\/\/doi.org\/10.3390\/rs10091336","relation":{},"ISSN":["2072-4292"],"issn-type":[{"type":"electronic","value":"2072-4292"}],"subject":[],"published":{"date-parts":[[2018,8,22]]}}}