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Thanks, Nikos On 23/05/15 11:04, Nikos Alexandris
wrote:
* Micha Silver <[email protected]> [2015-05-23 10:05:14 +0300]:When doing atmospheric correction with i.atcorr on LandSat 8 images (after i.landsat.toar), is it correct to set range="0,65535"?RADIANCE_MAXIMUM_BAND_3Hi Micha. After i.landsat.toar you will have either Radiance or Reflectance. For both the 11-bit range suggested above is not valid I think. So, do I need to read the Min and Max radiance for each band separately from the MTL file, and use those as the range= parameter? The default of "0,255" seems to be too small. I'm getting some radiance values > 600 . And the values of RADIANCE_MAXIMUM_BAND_x in the metadata seem to also show these high numbers. Best, Micha In the metadata file the minimum and maximum values for spectral radiance are reported (watts / m^2 * ster * microns). As for the reflectance, it is unitless and should, in theory, range in [0, 1.0]. Though, outliers are sometimes expected. Nikos This mail was received via Mail-SeCure System. |
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