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Last Post 18 Nov 2011 09:52 AM by  anon
QuickBird FLAASH
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anon



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18 Nov 2011 09:52 AM
    I'm using QuickBird images in Antarctica to extract soil moisture values from field work. I'm running the images through FLAASH to obtain the surface reflectance values. I'm getting reasonable values once I ran the image through ( -0.22 to 1.3 in the pan band). In order to obtain these values I have to divide the image by 1000 in band math. I might have a scaling problem with images. I'll quickly show my steps to achieve the final image: QB Radiance in Preprocessing: Scale output to Integers? No, output to floating point. Input Radiance Image: Use single scale factor for all bands. 1.000 Run FLAASH, divide image by 1000. Is this right? Thanks

    MariM



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    21 Nov 2011 10:29 AM
    FLAASH uses a default value of 10000 for the output scale factor. You can check this in the Advanced Parameters. So, once you run FLAASH on your radiance cube, you should divide the data by 10,000.

    Deleted User



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    21 Nov 2011 11:38 AM
    Thanks, my values are off by a order of magnitude then. I'll have to double check my steps.
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