User Guide for MOD09GFS and MOD15GFS Version 1.0

This Guide is a living document that describes the smoothed and gap-filled MODIS VIs (LAI/FPAR from MOD15A2, and EVI/NDVI calculated from MOD09A2 and MOD09Q2). It is revised as progress is made in the development of these products. The purpose of the document is to give the potential user an understanding of the MOD09GFS and MOD15GFS products and the current state of the data in those products. The Moderate Resolution Imaging Spectroradiometer (MODIS) is a key instrument aboard NASA’s Terra and Aqua satellites. Both Terra and Aqua image the entire Earth's surface every 1 to 2 days, and provide vital information for global change research. MODIS land products are critical inputs to parameterize, calibrate, and validate climat