What version of ENVI are you running? I am running 5.3 and find that when I open a Hyperion HDF file, it has a coordinate system defined as WGS-84 and some geopoints, which really isn't a projection. However, the result from Radiometric Calibration results in the same coordinate system in the calibrated file. FLAASH does not care if a file has the coordinate system or spatial reference defined for a file. It will accept a file with or without this information. Do you get an error when you process the file in FLAASH? If so, what is the error message you receive?

I can run FLAASH without problems, but the FLAASH output doesn't have a defined projection. I'm using ENVI 5.3. Itiya

It does look like FLAASH is removing the geo points from the input radiance file. It is not a real projection but FLAASH should not remove this information. What you can do is open the header of the radiance input image and copy the geo points structure, and then paste this into the header of the FLAASH result image. This structure will look something like this: geo points = { 1.00000000, 1.00000000, 28.58157500, -82.75367300, 256.00000000, 1.00000000, 28.56729300, -82.66275500, 1.00000000, 3184.00000000, 27.71970400, -82.94301700, 256.00000000, 3184.00000000, 27.70551000, -82.85311700} When you open the FLAASH file, you should have the pseudo projection back.

Hi, I just tried copying and pasting the geopoints from the radiance hdr file to the FLAASH hdr file, but it still doesn't recognize any pseudo projection when I reopen it in ENVI. Itiya

Can you post the header file that you modified and added the points to? Also, open the file in ENVI and go to the Metadata viewer. In the viewer, export the nodes of the header and post those as well.

I just retried it, and it worked, thanks! Itiya