4SM ALI greenland

EO1-ALI

FCC	EO1-ALI, July 31rst 2008 EO1A0080122008212110K3 Melting has just started The shallow pond is 2400 m from W to E Water is at most 2 m deep Notice that the snow seems to be mostly dirty The challenge is to try and achieve an optical calibration how clear is the water? what operational wavelengths?
Calibration 6 5 4 3 Calibration 5 4 3 2	Optical calibration in spite of the small size of the pond the calibration is possible again, it confirms the need to offset WL[green] towards longer wavelength (solution C) for Landsat and ALI images an operational WL[green]~=586 nm appears to be convenient under the current illumination and water conditions the water would appear to be quite turbid, loaded with the dust that covers the snow!!! 2K[867 nm]~=3.17 m^-1 2K[790 nm]~=2.53 m^-1
average bottom brightness mostly very bright, but not everywhere	computed depth at most ~2 m