Brown, Molly. E., Jorge. E. Pinzón, Kamel Didan, Jeffrey T. Morisette, and Comton J. Tucker. 2006. "Evaluation of the Consistency of Long-Term NDVI Time Series Derived from AVHRR,SPOT-Vegetation, SeaWiFS, MODIS, and Landsat ETM+ Sensors." IEEE Transactions on Geoence & Remote Sensing...