Greetings, I have some code, but it is specific for 8-bit Terra 16-day max-NDVI products that were available through the University of Maryland GLAM website (http://pekko.geog.umd.edu.../test/data_new.php). They are not optimized for Aqua NDVI but that could be modified easily enough. If you're using 8-day or 16-day emodis products you'll need to modify the code. Let me know if you'd like the code. I have separate PRO files which do the following: 1. Convert 8-bit scaled to actual floating point NDVI 2. Stack NDVI files into a single stack 3. Smooth NDVI files using a Savitzky-Golay filter (you will need to download the S-G filter from the ENVI code library). Good luck, Guy

Hello Guy, Thank you for your help..indeed your code will be very useful for me... so pls share with me...I am trying to study crop phenology and growing season... I had a look on the URL provided, data is pretty massive and I hope i could make us of this data for my study region... So kindly share the code and for any doubts, i will post you a mail.. Thanxs Giri

Greetings Guy, Can I also have the IDL codes? I am starting to learn IDL now. I want to extract the crop phenology and understanding the crop pattern using MODIS 8-day SR (MOD09A1) time-series data. I need to stack the imageries first and .. still long process. How can I send you my email? Riswan

Dear Guy, could also share this code with me? Will be very thankful!

Could you help us with the code? Tks Ivan

As of ENVI 5.2, there is a time series task that you can use now: http://www.harrisgeospatial.com/docs/...