Hi everyone, I'm very new in using ENVI and i need some help :) The thing is i've downloaded the "moffett field" data from the AVIRIS's website. The package has some data files like: .eng, .nav, .rfl  etc...  I want to open the rfl(AVIRIS INVERTED REFLECTANCE IMAGE DATA) file but i haven't come up with the solution. I use the menu : Open Image File --> (Select the First Scene File) "f970620t01p02_r03_sc01.a.rfl"  (The file size is 140,836,864 bytes.) --> Enter Samples : 614, Lines: 512, Bands: 224   But then i stuck. I don't know what is the header file? In the tutorial there is a file type int, but in this dataset i don't have a file like this. Also What should be the offset value and x-y coordinates. I've read a lot of tutorial but none of them uses rfl(AVIRIS INVERTED REFLECTANCE IMAGE DATA) file as an input file. Can anyone help me?