Andrew Wald - IEEE Xplore Author Profile

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The Moderate Resolution Imaging Spectroradiometer (MODIS) is currently flying on NASA's Earth Observing System Terra and Aqua satellites, launched in 1999 and 2002, respectively. MODIS reflective solar bands in the visible wavelength range are known to be sensitive to polarized light based on prelaunch polarization sensitivity tests. After about five years of on-orbit operations, it was discovered...Show More
We obtain valuable information on the angular and seasonal variability of surface reflectance using a hand-held spectrometer from a light aircraft. The data is used to test a procedure that allows us to estimate visible surface reflectance from the longer wavelength 2.1 /spl mu/m channel (mid-IR). Estimating or avoiding surface reflectance in the visible is a vital first step in most algorithms th...Show More
A new technique for remote sensing of aerosol over the land and for atmospheric correction of Earth imagery is developed. It is based on detection of dark surface targets in the blue and red channels, as in previous methods, but uses the 2.1 /spl mu/m channel, instead of the 3.75 /spl mu/m for their detection. A 2.1-/spl mu/m channel is present on ADEOS OCTS and GLI and planned on EOS-MODIS and EO...Show More