Improved Temperature and Emissivity Separation Algorithm for Multispectral and Hyperspectral Sensors
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F17%3A00468557" target="_blank" >RIV/86652079:_____/17:00468557 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1109/TGRS.2016.2631508" target="_blank" >http://dx.doi.org/10.1109/TGRS.2016.2631508</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1109/TGRS.2016.2631508" target="_blank" >10.1109/TGRS.2016.2631508</a>
Alternative languages
Result language
angličtina
Original language name
Improved Temperature and Emissivity Separation Algorithm for Multispectral and Hyperspectral Sensors
Original language description
The Temperature and Emissivity Separation (TES) algorithm was originally developed for the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER). This paper focuses on improving the TES algorithm. The main modification is the replacement of the normalized emissivity module with a new module, which is based on the smoothing of spectral radiance signatures. Smoothing is performed by estimating emissivity using an optimized approximation of the relationship between brightness temperature and emissivity. The improved TES algorithm, which is called Optimized Smoothing for Temperature Emissivity Separation (OSTES), was first tested on simulated data from three different sensors, namely, ASTER, Airborne Hyperspectral Scanner, and Thermal Airborne Spectrographic Imager. Processing simulated data with OSTES shows that it produces more accurate and precise temperature and emissivity retrievals than TES for samples with low spectral contrast. These results also show that the OSTES is less sensitive to variations in atmosphere and sample temperatures. The OSTES performance was secondly tested and compared with ASTER standard products. Testing showed that the OSTES temperature retrievals agree with AST_08 (kinetic temperature) but the emissivity retrievals differ substantially from AST_05 (surface emissivity). This implies that the ASTER standard products, AST_08 and AST_05, are not consistent with each other. Emissivities that are derived using temperatures from AST_08 and ASTER thermal surface radiances from AST_09T perform similar or worse when compared with OSTES emissivities. Emissivities delivered by AST_05 also exhibit step discontinuities, whereas the OSTES emissivitites are smoother over homogeneous surfaces. However, all emissivity spectra are affected by imperfect atmospheric corrections.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10511 - Environmental sciences (social aspects to be 5.7)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
IEEE Transactions on Geoscience and Remote Sensing and IEEE Transactions on Geoscience Electronics
ISSN
0196-2892
e-ISSN
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Volume of the periodical
55
Issue of the periodical within the volume
4
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
1944-1953
UT code for WoS article
000396394900007
EID of the result in the Scopus database
2-s2.0-85008441564