Hello guys, Im still on the process of learning and discovering how to use IDL (i dont have any background in programming). Im using MODIS surface reflectance 250 and 500m multitemporal images for rice area mapping. I just want to ask if any of you have tried using IDL to extract the quality control flag? Any idea on where I can find info on how to write idl function for this?  Would really appreciate any help I can get.... Thank you very much in advance.