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Synchronous retrieval of land surface temperature and emissivity

Science in China Series D: Earth Sciences : Volume 41, Issue 2, December 1998

Science in China Series D: Earth Sciences : Volume 41, Issue 2, Supplement,December 1998

Science in China Series D: Earth Sciences : Volume 41, Issue 5, October 1998

Science in China Series D: Earth Sciences : Volume 41, Issue 4, August 1998

Science in China Series D: Earth Sciences : Volume 41, Issue 3, June 1998

Science in China Series D: Earth Sciences : Volume 41, Issue 1, Supplement,April 1998

Science in China Series D: Earth Sciences : Volume 41, Issue 1, April 1998

Science in China Series D: Earth Sciences : Volume 40

Synchronous retrieval of land surface temperature and emissivity

Content Provider	Springer Nature Link
Author	Xu, Xiru Liu, Qinhuo Chen, Jiayi
Copyright Year	1998
Abstract	This is an old topic for more than ten years to retrieve land surface temperature (LST) from satellite data, but it has not been solved yet. At first, people tried to transplant traditional split window method of sea surface temperature (SST) to the retrieval of LST, but it was found that the emissivities of land surface (ε$_{i}$) must be involved in atmospheric correction. Then many different formulas appeared with assumption of emissivities known. In fact, emissivities of land surface with pixel size cannot be known beforehand because of various reasons, so in recent years the focus of attention has been transferred to retrieving emissivities (ε$_{i}$) and LST at the same time. Therefore, we have to solve missing equations problem. For this some people try to introduce middle infrared information, but new problems will be brought in which means that it is very difficult to describe middle infrared BRDF of targets with high accuracy and the scattering of atmospheric aerosol cannot be ignored. Therefore a different way is offered to solve this problem only using two thermo-infrared bands data based on three assumptions, constant emissivities in two measurements, and the same atmospheric parameters for neighbouring pixels and the difference of emissivity (Δε) of two channels can be known beforehand. Results of digital simulations show that it is possible to retrieve LST with its root mean square (RMS) of errors less than 1 K and RMS of relative error of ground radiance at 7% if the error of atmospheric temperature at ± 2°C and the relative error of atmospheric water vapor at ± 10% can be satisfied. Results have been confirmed by initial field test.
Starting Page	658
Ending Page	668
Page Count	11
File Format	PDF
ISSN	10069313
Journal	Science in China Series D: Earth Sciences
Volume Number	41
Issue Number	6
e-ISSN	18622801
Language	English
Publisher	Science in China Press
Publisher Date	1998-01-01
Publisher Place	Beijing
Access Restriction	Subscribed
Subject Keyword	land surface temperature emissivity retrieval of remote sensing Geosciences
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences

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