Depends on the 'type' of reflectance. For at-surface reflectance you must perform a full atmospheric correction using Atcor or Flaash or other RTM approaches. Best, Chris

If you are interested in IRS R2 AWiFS then Atmospheric Correction Model for Resourcesat-2 AWiFS data (SACRS2) - (Windows XP) is available at http://www.mosdac.gov.in/tools/SACRS2_Package.rar

Dear Renato,

check ur mail box. i am sending the model

Renato,

I have developed and used image based atmospheric correction methods to various satellite image data sets including Landsat TM and others.  The link below is to a set of slides that I used recently in presentations at the University dealing with this topic.  If you are interested you will also find 3 publications on the methods covered in the slides.

Good luck with your work.

Pat

Data Presentation - Radiometric Calibration and Atmospheric Corrections

inboxed

I could not use SACRS2 for LISS3 images. The results are not good.

You can use the approach:

Lrad