SPOT data usually comes in DN and should be converted to radiance prior to input to FLAASH.  You will need to know what the units of radiance are in order to supply the correct scale factor.  You might try the SPOT_Radiance tool available from www.ittvis.com ->User Community->Code Library.  Do a search for SPOT and you should see this tool.  It will help you convert your SPOT data to radiance and the output units are in W/(m^2*sr*um) which are the same radiance units for Landsat when converted to radiance.  So once you have converted your SPOT image to radiance, your scale factor for FLAASH will be 10.

[QUOTE]mminari wrote SPOT data usually comes in DN and should be converted to radiance prior to input to FLAASH.  You will need to know what the units of radiance are in order to supply the correct scale factor.  You might try the SPOT_Radiance tool available from www.ittvis.com ->User Community->Code Library.  Do a search for SPOT and you should see this tool.  It will help you convert your SPOT data to radiance and the output units are in W/(m^2*sr*um) which are the same radiance units for Landsat when converted to radiance.  So once you have converted your SPOT image to radiance, your scale factor for FLAASH will be 10. [/QUOTE] Hi, thanks for your response! I´ve loaded a .DIM file in ENVI and the calibration SPOT tool doesn´t ask me any extra requirements. It generates a new file without touching radiance units.. so I would like to ask you if this new file is the one I have to load in the FLAASH input box just giving a scale factor of 10 for a correct processing. Thank you very much Mari.  

You should only be prompted to select the .dim if you did not open the image as SPOT DIMAP or if your file was in another format such as ENVI.  So your data should be ready for FLAASH using the scale factor of 10.

Thank you very much!