{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T04:19:17Z","timestamp":1760242757279,"version":"build-2065373602"},"reference-count":43,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2016,6,24]],"date-time":"2016-06-24T00:00:00Z","timestamp":1466726400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100012166","name":"National Basic Research Program of China","doi-asserted-by":"publisher","award":["2013CB733406"],"award-info":[{"award-number":["2013CB733406"]}],"id":[{"id":"10.13039\/501100012166","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["41271380","41571356"],"award-info":[{"award-number":["41271380","41571356"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>In the inversion of land surface temperature (LST) from satellite data, obtaining the information on land surface emissivity is most challenging. How to solve both the emissivity and the LST from the underdetermined equations for thermal infrared radiation is a hot research topic related to quantitative thermal infrared remote sensing. The academic research and practical applications based on the temperature-emissivity retrieval algorithms show that directly measuring the emissivity of objects at a fixed thermal infrared waveband is an important way to close the underdetermined equations for thermal infrared radiation. Based on the prior research results of both the authors and others, this paper proposes a new approach of obtaining the spectral emissivity of the object at 8\u201314 \u00b5m with a single-band CO2 laser at 10.6 \u00b5m and a 102F FTIR spectrometer. Through experiments, the spectral emissivity of several key samples, including aluminum plate, iron plate, copper plate, marble plate, rubber sheet, and paper board, at 8\u201314 \u00b5m is obtained, and the measured data are basically consistent with the hemispherical emissivity measurement by a Nicolet iS10 FTIR spectrometer for the same objects. For the rough surface of materials, such as marble and rusty iron, the RMSE of emissivity is below 0.05. The differences in the field of view angle and in the measuring direction between the Nicolet FTIR method and the method proposed in the paper, and the heterogeneity in the degree of oxidation, polishing and composition of the samples, are the main reasons for the differences of the emissivities between the two methods.<\/jats:p>","DOI":"10.3390\/s16070970","type":"journal-article","created":{"date-parts":[[2016,6,25]],"date-time":"2016-06-25T21:21:45Z","timestamp":1466889705000},"page":"970","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Non-Contact Measurement of the Spectral Emissivity through Active\/Passive Synergy of CO2 Laser at 10.6 \u00b5m and 102F FTIR (Fourier Transform Infrared) Spectrometer"],"prefix":"10.3390","volume":"16","author":[{"given":"Ren-Hua","family":"Zhang","sequence":"first","affiliation":[{"name":"Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2147-3646","authenticated-orcid":false,"given":"Hong-Bo","family":"Su","sequence":"additional","affiliation":[{"name":"Department of Civil, Environmental and Geomatics Engineering, Florida Atlantic University, Boca Raton, FL 33431, USA"}]},{"given":"Jing","family":"Tian","sequence":"additional","affiliation":[{"name":"Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China"}]},{"given":"Su-Juan","family":"Mi","sequence":"additional","affiliation":[{"name":"Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China"},{"name":"University of Chinese Academy of Sciences, Beijing 100049, China"}]},{"given":"Zhao-Liang","family":"Li","sequence":"additional","affiliation":[{"name":"Key Laboratory of Agri-informatics, Ministry of Agriculture\/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China"},{"name":"ICube, UdS, CNRS, 300 Boulevard Sebastien Brant, CS 10413, Illkirch 67412, France"}]}],"member":"1968","published-online":{"date-parts":[[2016,6,24]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2279","DOI":"10.1364\/AO.19.002279","article-title":"Middle infrared multispectral aircraft scanner data: Analysis for geologic applications","volume":"19","author":"Kahle","year":"1980","journal-title":"Appl. Opt."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"113","DOI":"10.1016\/0034-4257(92)90094-Z","article-title":"Spectral ratio method for measuring emissivity","volume":"42","author":"Watson","year":"1992","journal-title":"Remote Sens. Environ."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"117","DOI":"10.1016\/0034-4257(92)90095-2","article-title":"Two-temperature method for measuring emissivity","volume":"42","author":"Watson","year":"1992","journal-title":"Remote Sens. Environ."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"1113","DOI":"10.1109\/36.700995","article-title":"A temperature and emissivity separation algorithm for Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) images","volume":"36","author":"Gillespie","year":"1998","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_5","unstructured":"Kealy, P.S., and Gabell, A.R. (1990). Estimation of Emissivity and Temperature Using Alpha Coefficients, JPL Publication."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"123","DOI":"10.1016\/0034-4257(92)90096-3","article-title":"A comparison of Techniques for Extracting Emissivity Information from Thermal Infrared Data for Geologic Studies","volume":"42","author":"Hook","year":"1992","journal-title":"Remote Sens. Environ."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"17","DOI":"10.1016\/0034-4257(90)90095-4","article-title":"Temperature-independent spectral indices in thermal infrared bands","volume":"32","author":"Becker","year":"1990","journal-title":"Remote Sens. Environ."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"67","DOI":"10.1016\/0034-4257(93)90065-6","article-title":"Feasibility of land surface temperature and emissivity determination from AVHRR data","volume":"43","author":"Li","year":"1993","journal-title":"Remote Sens. Environ."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"197","DOI":"10.1016\/S0034-4257(99)00049-8","article-title":"Evaluation of six methods for extracting relative emissivity spectra from thermal infrared images","volume":"69","author":"Li","year":"1999","journal-title":"Remote Sens. Environ."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"23","DOI":"10.1007\/BF02916575","article-title":"A physically based algorithm for land surface emissivity retrieval from combined mid-infrared and thermal infrared data","volume":"43","author":"Li","year":"2000","journal-title":"Sci. China Ser. E Technol. Sci."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"97","DOI":"10.1007\/BF02879653","article-title":"On the separate retrieval off soil and vegetation temperatures from ATSR data","volume":"44","author":"Li","year":"2001","journal-title":"Sci. China Ser. D Earth Sci."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"14","DOI":"10.1016\/j.rse.2012.12.008","article-title":"Satellite-derived land surface temperature: Current status and perspectives","volume":"131","author":"Li","year":"2013","journal-title":"Remote Sens. Environ."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"980","DOI":"10.1109\/36.602541","article-title":"A physics-based algorithm for retrieving land surface emissivity and temperature from EOS\/MODIS data","volume":"35","author":"Wan","year":"1997","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_14","unstructured":"Wan, Z. (1999). MODIS Land-Surface Temperature Algorithm Theoretical Basis Document, NASA\/GSFC."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"681","DOI":"10.1109\/36.499748","article-title":"Temperature and emissivity retrieval from remotelysensed images using the \u201cgrey body emissivity\u201d method","volume":"34","author":"Barducci","year":"1996","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_16","unstructured":"Gillespie, A.R. (1995). The TIMS Data Users\u2019 Workshop, JPL Publication."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"3681","DOI":"10.1016\/j.rse.2011.09.007","article-title":"Residual errors in ASTER temperature and emissivity standard products AST08 and AST05","volume":"115","author":"Gillespie","year":"2011","journal-title":"Remote Sens. Environ."},{"key":"ref_18","unstructured":"Gillespie, A.R., Rokugawa, S., Hook, S.J., Matsunaga, T., and Kahle, A.B. (1996). Temperature\/Emissivity Separation Algorithm Theoretical Basis Document, Version 2.4, NASA\/GSFC."},{"key":"ref_19","unstructured":"Borel, C. (1997, January 6\u20138). Iterative retrieval of surface emissivity and temperature for a hyperspectral sensor. Proceedings of the First JPL Workshop on Remote Sensing of Land Surface Emissivity, Pasadena, CA, USA."},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Borel, C. (1998, January 6\u201310). Surface emissivity and temperature retrieval for a hyperspectral sensor. Proceedings of the 1998 IEEE International Geoscience and Remote Sensing Symposium, Seattle, Washington, DC, USA.","DOI":"10.1109\/IGARSS.1998.702966"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"5029","DOI":"10.1080\/01431160802036540","article-title":"Error analysis for a temperature and emissivity retrieval algorithm for hyperspectral imaging data","volume":"29","author":"Borel","year":"2008","journal-title":"Int. J. Remote Sens."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"1291","DOI":"10.1109\/TGRS.2010.2062527","article-title":"Temperature and emissivity retrievals from hyperspectral thermal infrared data using linear spectral emissivity constraint","volume":"49","author":"Wang","year":"2011","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"144","DOI":"10.1175\/1520-0450(2002)041<0144:ARNNAF>2.0.CO;2","article-title":"A regularized neural net approach for retrieval of atmospheric and surface temperatures with the IASI instrument","volume":"41","author":"Aires","year":"2002","journal-title":"J. Appl. Meteorol."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"14887","DOI":"10.1029\/2001JD900085","article-title":"A new neural network approach including first guess for retrieval of atmospheric water vapor, cloud liquid water path, surface temperature, and emissivities over land from satellite microwave observations","volume":"106","author":"Aires","year":"2011","journal-title":"J. Geophys. Res."},{"key":"ref_25","first-page":"4620","article-title":"Remote sensing from the infrared atmospheric sounding interferometer instrument 2. Simultaneous retrieval of temperature, water vapor, and ozone atmospheric profiles","volume":"107","author":"Aires","year":"2002","journal-title":"J. Geophys. Res."},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Li, J., Weisz, E., and Zhou, D.K. (2007). Physical retrieval of surface emissivity spectrum from hyperspectral infrared radiances. Geophys. Res. Lett., 34.","DOI":"10.1029\/2007GL030543"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"909","DOI":"10.1364\/AO.41.000909","article-title":"Simultaneous retrieval of atmospheric profiles, land-surface temperature, and surface emissivity from moderate-resolution imaging spectroradiometer thermal infrared data: Extension of a two-step physical algorithm","volume":"41","author":"Ma","year":"2002","journal-title":"Appl. Opt."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"3537","DOI":"10.1364\/AO.39.003537","article-title":"Retrieval of geophysical parameters from Moderate Resolution Imaging Spectroradiometer thermal infrared data: Evaluation of a two-step physical algorithm","volume":"39","author":"Ma","year":"2000","journal-title":"Appl. Opt."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"249","DOI":"10.1016\/j.rse.2015.05.011","article-title":"Comparison of in-situ, aircraft, and satellite Land Surface Temperature measurements over a NOAA Climate Reference Network Site","volume":"165","author":"Krishnan","year":"2015","journal-title":"Remote Sens. Environ."},{"key":"ref_30","first-page":"2015","article-title":"A generalized single-channel method for retrieving land surface temperature from remote sensing data","volume":"108","author":"Sobrino","year":"2003","journal-title":"J. Geophys. Res."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"3719","DOI":"10.1080\/01431160010006971","article-title":"A mono-window algorithm for retrieving land surface temperature from Landsat TM data and its application to the Israel-Egypt border region","volume":"22","author":"Qin","year":"2001","journal-title":"Int. J. Remote Sens."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"490","DOI":"10.1016\/S0034-4257(96)00123-X","article-title":"Emissivity measurements of several soils and vegetation types in the 8\u201314 \u03bcm wave band: Analysis of two field methods","volume":"59","author":"Rubio","year":"1997","journal-title":"Remote Sens. Environ."},{"key":"ref_33","first-page":"117","article-title":"Influence of soil water content on the thermal infrared emissivity of bare soils: Implication for land surface temperature determination","volume":"112","author":"Mira","year":"2007","journal-title":"J. Geophys. Res."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"3664","DOI":"10.1364\/AO.48.003664","article-title":"Soil emissivity and reflectance spectra measurements","volume":"48","author":"Sobrino","year":"2009","journal-title":"Appl. Opt."},{"key":"ref_35","first-page":"1814","article-title":"Emissivity measurements for long distance using CO2 laser","volume":"23","author":"Zhang","year":"1985","journal-title":"Chin. Sci. Bull."},{"key":"ref_36","first-page":"108","article-title":"Far Distance Emissivity Measurement of Object by CO2-Laser","volume":"32","author":"Zhang","year":"1987","journal-title":"Chin. Sci. Bull."},{"key":"ref_37","first-page":"591","article-title":"A proposed approach to determine the emissivities of territorial surface from airborne and space borne","volume":"9","author":"Zhang","year":"1989","journal-title":"Int. J. Geophys. Res."},{"key":"ref_38","unstructured":"Zhang, R.H., Sun, X.M., and Zhu, Z.L. (1997, January 3\u20138). Feasibility of measuring directly distribution of the emissivities for territorial surface on sensing platforms. Proceedings of the 1997 IEEE International Geoscience and Remote Sensing, Remote Sensing A Scientific Vision for Sustainable Development, Singapore."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"3984","DOI":"10.1364\/AO.30.003984","article-title":"Scattering of a CO2 laser beam at 10.6 \u00b5m by bare soils: Experimental study of the polarized bi-directional scattering coeffcient; model and comparison with directional emissivity measurements","volume":"30","author":"Nerry","year":"1991","journal-title":"Appl. Opt."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"936","DOI":"10.1109\/36.508410","article-title":"CO2 laser light scattering by bare soil for emissivity measurement: Absolute calibration and correlation with backscattering and composition","volume":"34","author":"Kologo","year":"1996","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"169","DOI":"10.1088\/1464-4258\/2\/3\/302","article-title":"Polarized bidirectional scattering by bare soils","volume":"2","author":"Zallat","year":"2000","journal-title":"J. Opt. A Pure Appl. Opy."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"1679","DOI":"10.1364\/AO.35.001679","article-title":"Spectroradiometer for field measurements of radiance and emissivity","volume":"35","author":"Korb","year":"1996","journal-title":"Appl. Opt."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"1480","DOI":"10.1016\/j.rse.2010.02.002","article-title":"Investigating the effects of soil moisture on thermal infrared land surface temperature and emissivity using satellite retrievals and laboratory measurements","volume":"114","author":"Hulley","year":"2010","journal-title":"Remote Sens. Environ."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/16\/7\/970\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T19:24:44Z","timestamp":1760210684000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/16\/7\/970"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2016,6,24]]},"references-count":43,"journal-issue":{"issue":"7","published-online":{"date-parts":[[2016,7]]}},"alternative-id":["s16070970"],"URL":"https:\/\/doi.org\/10.3390\/s16070970","relation":{},"ISSN":["1424-8220"],"issn-type":[{"type":"electronic","value":"1424-8220"}],"subject":[],"published":{"date-parts":[[2016,6,24]]}}}