How to remove high frequency noise in Daily NDVI, modis MOD09GA ?

19 June 2020 0 2K Report

Hi,

Currently, I'm working on a research subject conducted on predicting the phenological stages of wheat using daily NDVI and accumulated growing degree day (AGDD). And I need to export the daily NDVI. But I got a high frequency noise. I tested many filters like S-G, Whittaker smoother... but no enhancement. This is my script below with crop mask of wheat (code=24). Please if someone knows how to get rid of noise I would be thankful.

https://code.earthengine.google.com/f236a17cd0058cbbca713385d61b47b9

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