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Article: A stepwise refining algorithm of temperature and emissivity separation for hyperspectral thermal infrared data

TitleA stepwise refining algorithm of temperature and emissivity separation for hyperspectral thermal infrared data
Authors
KeywordsHyperspectral
Remote sensing
Stepwise
Temperature and emissivity separation (TES)
Issue Date2010
Citation
IEEE Transactions on Geoscience and Remote Sensing, 2010, v. 48, n. 3 PART2, p. 1588-1597 How to Cite?
AbstractLand surface temperature (LST) and land surface emissivity (LSE) are two key parameters in numerous environmental studies. In this paper, a stepwise refining temperature and emissivity separation (SRTES) algorithm is proposed based on the analysis of the relationship between surface self-emission and atmospheric downward spectral radiance in a narrow spectral region. The SRTES algorithm utilizes the residue of atmospheric downward spectral radiance in the calculated surface selfemission as a criterion and adopts a stepwise refining method to determine both the emissivity at the location of an atmospheric emission line in a narrow spectral region and the surface temperature. Three methods have been used to evaluate the SRTES algorithm. First, numerical experiments are conducted to evaluate if the SRTES algorithm can accurately retrieve the "true" LST and LSE from the simulated data. When a noise equivalent spectral error of 2.5 e -9 W/cm 2/sr/cm -1 is added into the simulated data, the retrieved temperature bias (Tbias) is 0.04 ± 0.04 K, and the root-mean-square error (rmse) of the retrieved emissivity is below 0.002 except in the extremities of the 714-1250 cm -1 spectral region. Second, in situ measurements are used to validate the SRTES algorithm. The average rmse of the retrieved emissivity of ten samples is about 0.01 in the 750-1050 cm -1 spectral region and is 0.02 in the 1051-1250 cm -1 spectral region, but the rmse is larger when the sample emissivity is relatively low. Third, our new algorithm is compared with the iterative spectrally smooth temperature and emissivity separation (ISSTES) algorithm using both a simulated data set and in situ measurements. The comparison demonstrates that the SRTES algorithm performs better than the ISSTES algorithms, and it can overcome some of the common drawbacks in the existing hyperspectral TES algorithms for the accurate retrieval of both temperature and emissivity. © 2009 IEEE.
Persistent Identifierhttp://hdl.handle.net/10722/321411
ISSN
2023 Impact Factor: 7.5
2023 SCImago Journal Rankings: 2.403
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorCheng, Jie-
dc.contributor.authorLiang, Shunlin-
dc.contributor.authorWang, Jindi-
dc.contributor.authorLi, Xiaowen-
dc.date.accessioned2022-11-03T02:18:44Z-
dc.date.available2022-11-03T02:18:44Z-
dc.date.issued2010-
dc.identifier.citationIEEE Transactions on Geoscience and Remote Sensing, 2010, v. 48, n. 3 PART2, p. 1588-1597-
dc.identifier.issn0196-2892-
dc.identifier.urihttp://hdl.handle.net/10722/321411-
dc.description.abstractLand surface temperature (LST) and land surface emissivity (LSE) are two key parameters in numerous environmental studies. In this paper, a stepwise refining temperature and emissivity separation (SRTES) algorithm is proposed based on the analysis of the relationship between surface self-emission and atmospheric downward spectral radiance in a narrow spectral region. The SRTES algorithm utilizes the residue of atmospheric downward spectral radiance in the calculated surface selfemission as a criterion and adopts a stepwise refining method to determine both the emissivity at the location of an atmospheric emission line in a narrow spectral region and the surface temperature. Three methods have been used to evaluate the SRTES algorithm. First, numerical experiments are conducted to evaluate if the SRTES algorithm can accurately retrieve the "true" LST and LSE from the simulated data. When a noise equivalent spectral error of 2.5 e -9 W/cm 2/sr/cm -1 is added into the simulated data, the retrieved temperature bias (Tbias) is 0.04 ± 0.04 K, and the root-mean-square error (rmse) of the retrieved emissivity is below 0.002 except in the extremities of the 714-1250 cm -1 spectral region. Second, in situ measurements are used to validate the SRTES algorithm. The average rmse of the retrieved emissivity of ten samples is about 0.01 in the 750-1050 cm -1 spectral region and is 0.02 in the 1051-1250 cm -1 spectral region, but the rmse is larger when the sample emissivity is relatively low. Third, our new algorithm is compared with the iterative spectrally smooth temperature and emissivity separation (ISSTES) algorithm using both a simulated data set and in situ measurements. The comparison demonstrates that the SRTES algorithm performs better than the ISSTES algorithms, and it can overcome some of the common drawbacks in the existing hyperspectral TES algorithms for the accurate retrieval of both temperature and emissivity. © 2009 IEEE.-
dc.languageeng-
dc.relation.ispartofIEEE Transactions on Geoscience and Remote Sensing-
dc.subjectHyperspectral-
dc.subjectRemote sensing-
dc.subjectStepwise-
dc.subjectTemperature and emissivity separation (TES)-
dc.titleA stepwise refining algorithm of temperature and emissivity separation for hyperspectral thermal infrared data-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1109/TGRS.2009.2029852-
dc.identifier.scopuseid_2-s2.0-77956198306-
dc.identifier.volume48-
dc.identifier.issue3 PART2-
dc.identifier.spage1588-
dc.identifier.epage1597-
dc.identifier.isiWOS:000274794700023-

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