I need to convert modis MOD021km data to reflectance and Brightness temperature.
I know that some plugins for Envi is doing this with modis data but I want to run an atmospheric correction on my data first and for this purpose I am using FLAASH in Envi,
It works fine but The results that I get are a bit strange.For example here is a DN of a pixel
before Run flash:129.676651 afrer FLAASH:3144 The Reflactance that is calculated using MCTK plugin(without FLAASH):0.261504
If I want to convert the result of FLASH to reflectance and brightness temperature what algorithms should I use?
I know the algorithms for converting DN's to BT and .. but I think the result of FLASH should not used directly in those algorithms ..
Do you know how to use FLAASH results in case of calculating reflectance and brightness temperature?