X
PrevPrev Go to previous topic
NextNext Go to next topic
Last Post 12 Oct 2011 02:04 AM by  anon
Flaash Module Help
 1 Replies
Sort:
You are not authorized to post a reply.
Author Messages

anon



New Member


Posts:
New Member


--
12 Oct 2011 02:04 AM
    I am working on Atmospheric correction of Landsat ETM+ image (Path= 150, Row= 37) using FLAASH module of ENVI software. When i input Radiance image, ENVI software prompt "Enter ASCII file name containing wavelengths and FWHM". Can any one tell how to create this file? FWHM values for Landsat ETM+ image is same for all or different for every Landsat ETM+ image? How can i get these values? Also tell how to get "Flaash Parameter Template File" which is the requirement of Flaash module (when pressed restore button)?

    MariM



    Veteran Member


    Posts:2396
    Veteran Member


    --
    12 Oct 2011 10:40 AM
    If you opened your Landsat file as 'Geotiff with metadata' the wavelengths will already be defined for the file. If you did not do this, then you have to manually enter the wavelengths in the header of the file by going to File ->Edit ENVI Header ->Edit Attributes ->Wavelengths. You do not need to enter FWHM as they are not required. FLAASH will assume a gaussian response function when FWHM are not present. The FLAASH template file is created after you have entered all the parameters for the FLAASH process. Then you can choose the 'Save...' button to save the template for later use, or if you just run the FLAASH process a template file will be created in the specified output directory along with the other FLAASH products.
    You are not authorized to post a reply.

    Forums Products ENVI