AVHRR NDVI and Departure from Average GeoTIFFS

This product is a GeoTIFF image illustrating the Normalized Difference
Vegetative Index (NDVI) across the conterminous United States, as well
as subsets for the states of North Dakota, South Dakota, Montana,
Wyoming, and Idaho. In order to provide a product that is easily
interpreted by our users, the Upper Midwest Aerospace Consortium
(UMAC) acquires a weekly NDVI product and a Departure from NDVI
average product from the EROS Data Center and converts these products
into a GeoTIFF image. This GeoTIFF image illustrates for the user the
relative greenness of an area and the comparison of a particular
week's index to the average of that week historically. The
values in the image are no longer linked to real data values, but are
rather simply color coded for illustrative purposes. The dataset
covers the year 2000 with some gaps.