On the atmosphere correction to TM image by using ENVI flaash

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Last Post 10 Mar 2008 07:42 AM by anon

On the atmosphere correction to TM image by using ENVI flaash tech

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anon

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10 Mar 2008 07:42 AM
I am a beginner , now i am using flaash to correct a TM image . i am sure that all process is according to the ' FLAASH Module User's Guide'. But the result always appear such as reflectance data distortion , for example most of data are not in the normally range. So please, someone can give me a advice, may as well detail.

MariM

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10 Mar 2008 07:42 AM
There is a tutorial on how to process Landsat imagery in FLAASH that comes with the ENVI CD set. Remember, the output reflectance from FLAASH is always scaled by 10,000 unless you change this in the Advanced Settings but I would suggest you not set this to 1.0 to try and force FLAASH to output a floating point image cube in the range of 0-1.0 because you will get expected results. FLAASH always outputs signed integer data so the cube will be all 0s.

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