http://staff.polito.it/amelia.sparavigna/DUNE/
"Moving Dunes on the Google Earth" at http://arxiv.org/abs/1301.1290
(where I show how to use the time series of the Google Earth to estimate the motion of the barchans. I discuss also how to use reference points and adjust the Google images to have a "movie")
"A Study of Moving Sand Dunes by Means of Satellite Images"