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Last Post 11 Mar 2019 05:51 AM by  MariM
Converting L8 OLI Thermal bands to surface reflectance
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joseph kafka



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05 Mar 2019 12:14 AM
    Hi,

    I would like to convert a Level 1c Landsat 8 OLI product to surface reflectance like that of the multispectral bands. Do i have to follow the same procedure of Level 1C bands -> Radiometric calibration -> FLAASH or is there intermediate steps that has to be included for thermal bands ?

    MariM



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    05 Mar 2019 05:24 AM
    FLAASH and Quac do not support thermal data. You would instead use the thermal atmospheric correction tool:
    http://www.harrisgeospati...ection.html#Atmosphe

    joseph kafka



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    10 Mar 2019 07:25 PM
    Thanks for the reply. I couldn't reply as i was out of town for couple of days.

    I've tried Thermal Atmospheric Correction tool. But the values are in the range of 0 to 1.2. Does that mean it's still in ToA ? Does it have anything to do with scale factor ? I want Thermal bands to be in the unit of wavelength as i would like to do band combinations with other atmospherically corrected bands which are in the unit of spectral wavelength

    MariM



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    11 Mar 2019 05:51 AM
    When you open your Landsat OLI using the metadata file, the bands should have the wavelengths assigned to each band (10.4 and 12 um). This should be retained through radiometric calibration and thermal atmospheric correction. After the correction, you can use Emissivity normalization or Emissivity reference channel to calculate brightness temperature from the atmospherically corrected data.
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