The method of separation of temperature and emissivity (TES) developed by Gillespie et al. (1998): this algorithm is easy to use, it requires two multispectral measurements: one on the sample and the other on a reference reflective plate to obtain the contribution of the environment. In addition, no prior knowledge of the surface is necessary. The TES algorithm used for ASTER data has been developed for the five infrared thermal bands of the ASTER infrared sensor. The TES combines three interrelated modules: the Normalized Emissivity Method (NEM) module; The Ratio module (Watson, 1992); The Minimum Maximum Difference (MMD) module.
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Dear Sir. Concerning your issue about the Temperature and Emissivity Separation (TES) method. TES algorithm hybridizes three established algorithms, first estimating the normalized emissivities and then calculating emissivity band ratios. An empirical relationship predicts the minimum emissivity from the spectral contrast of the ratioed values, permitting recovery of the emissivity spectrum. TES uses an iterative approach to remove reflected sky irradiance. Based on numerical simulation, TES should be able to recover temperatures within about /spl plusmn/1.5 K and emissivities within about /spl plusmn/0.015. Validation using airborne simulator images taken over playas and ponds in central Nevada demonstrates that, with proper atmospheric compensation, it is possible to meet the theoretical expectations. The main sources of uncertainty in the output temperature and emissivity images are the empirical relationship between emissivity values and spectral contrast, compensation for reflected sky irradiance, and ASTER's precision, calibration, and atmospheric compensation. I think the following below links and the attached file may help you in your analysis:
http://ieeexplore.ieee.org/document/700995/
http://www.tandfonline.com/doi/abs/10.1080/0143116031000115274?journalCode=tres20
https://unit.aist.go.jp/igg/rs-rg/ASTERSciWeb_AIST/en/documnts/pdf/2b0304.pdf
Thanks
Thank you Mr. Issam Eldin Hussein El Ghailani for the interest in my question and thank you for your help I hope that the following documents will help me in my analyzes.
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