I want to use MODIS NDVI time series to extract phenological parameters using TIMESAT software. I have question about data prepration, Is it alwaysd necessery to rescale NDVI data? valid range in MODIS NVDVI is -2000 to 10000. I have cliped NDVI images with my study area map and now I have NDVI images with background value 0. I think I must set background value to -3000, because zero is a valid value in NDVI data, and the fill value / no data value in modid NDVI is -3000.

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