Hi there, I have performed Landsat radiometric calibration to reflectance using the radiometric calibration tool in ENVI. I'm just a bit confused about the output. As far as I understand it, the values are TOA reflectance ranging from 0-1 (0 to 100%?). According to the literature I've read, sand should have a high reflectance in most bands and also ought to be some of the brightest pixels in my scene, since they appear almost white. Why is it that my beaches have values of around 0.25 to 0.4? Should it not be higher? My spectral curve appears to be the right shape, though - just with much lower values than I expected. The brightest pixels in my image are undoubtedly due to cloud, but even these values only go up to 0.7. Should the brightest pixels in my image not be 1.0? Perhaps I'm totally misunderstanding. Any explanation will be massively appreciated. Thanks!