Frequent cloud cover was a limiting factor in the image acquisition process. This resulted in the use of images that span a five-month range and contain almost the entire phenological and foliage cycle of the deciduous trees in the study site. Kennedy et al. [25] state that consistency of seasonality trumps absence of clouds as the highest priority in disturbance mapping, but other images were not available for this study. Dynamic atmospheric conditions also restricted the study site to only a portion of the original 185 by 185 km image tile. This resulted in a variable inter-annual interval with two, four and five year time steps and not annual, anniversary image intervals.