Surface Temperature in Landsat 5 TM - NV5 Geospatial

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Last Post 29 May 2018 10:28 AM by MariM

Surface Temperature in Landsat 5 TM

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Jose Manuel Lattus

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Posts:39

11 May 2018 04:55 PM
Hello! For get Surface temperature in Lansat7, 8 and ASTER y follow this steps. 1) Radiometric Calibration (radiance). 2)Thermal Atmospheric Correction. 3) Emissivity Normalization. But in Landsat 5 is not possible to run "Atmospheric Correction" because it needs more than one thermal band! The Brightness Temperature I can get using Radiometric Calibration is not comparable to Surface Temperature. So, I can jump the "Atmospheric Correction" and just use 1) Radiometric Calibration. 2)Emissivity Normalization? Are this band values comparable with the other products (wich consider Atmospheric Correction)... if they are not comparable, can I use the same 2 steps for all iamges (TM7-8) and do not use Atmospheric Correction, this product is Ok or AtmCorrection is needed? best regards!!!! José Manue Lattus

MariM

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Posts:2396
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29 May 2018 10:28 AM
It is true that the thermal atmospheric correction available in ENVI requires more than one band in order to best estimate atmospheric effects in thermal data. Unfortunately, for single band thermal data, there is no method to convert to surface temperature in ENVI. While the emissivity normalization would accept TOA temperature, there could be inaccuracies without an atmospheric correction and I would not suggest you compare the images to other images that have been atmospherically corrected. Have you checked the USGS for higher level Landsat-5 products that may have already corrected to surface temperature? I know they are providing surface reflectance for the older landsat sensors.

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