Geographic Information Systems

Questions tagged [flaash]

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Fast Line-of-sight Atmospheric Analysis of Hypercubes

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1answer
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Explanation on band conversion from radiance to reflectance final value

I've watched few video on conversion of radiance to reflectance for landsat band, most of them recommended to use formula below to to make sure the final reflectance value lies in between 0 to 1. My ...
0
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1answer
33 views

FLAASH produces weird peaks

I am applying FLAASH to atmospherically correct and convert to reflectance a hyperspectral image acquired by our airborne system. The problem is that FLAASH (using ENVI) outputs an image where all ...
1
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0answers
337 views

Planetscope images atmospheric correction

I have downloaded an image which is level 3B processed (so I already have surface reflectance), but my assignment is to compare the data values of the SR file with my results. At first I applied ...
0
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1answer
173 views

Pleiades atmospheric correction

I have phr1a and phr1b images (Pleiades) and I need to make atmospheric correction. First, I tried to do this by using Envi FLAASH. by the way, I tried also ERDAS atcor but there was also same ...
0
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1answer
819 views

ENVI Error running FLAASH Atmosphere Correction

I've made a Radiometric calibration on a Landsat-8 image. Next, I've tried to make a FLAASH Atmosphere Correction from the Toolbox but I get a warning message and the process stops with errors. The ...
1
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1answer
370 views

ENVI FLAASH Error

I try to run FLAASH on a Landsat 8 image. I radiometrically corrected the image using FLAASH output parameters using ENVI 5.4. It gives me the error message: ACC error: modrd5:reading archive file ...
2
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0answers
98 views

Improving FLAASH atmospheric correction to accurately represent subtle features in a target's spectral profile?

I am attempting to use ERDAS target detection models to detect/differentiate a specific type of soil from a general background. We have gathered spectral signatures of the target soil in the field ...
1
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0answers
394 views

Atmospheric correction using FLAASH

I want to run atmospheric correction on my Landsat TM5 picture using FLAASH (ENVI 4.8) but when I input radiance image (BIL format) into it, then this message is shown: "Enter ASCII filename ...
-1
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1answer
145 views

Atmospheric correction and difference(s) between ATCOR and FLAASH [closed]

Talking about atmospheric correction, I'm interested in knowing the difference between ATCOR and FLAASH given that both are based on MODTRAN. Anyone happened to know this or have a recommended text?
0
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2answers
991 views

Atmospheric correction with FLAASH

I see that people have suggested this post correction equation ((b1 le 0)*0+(b1 ge 10000)*1+(b1 gt 0 and b1 lt 10000)*float(b1)/10000) for atmospheric correction using FLAASH (where surface ...
2
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0answers
55 views

Issues with using FLAASH on GeoEye data

I am trying to carry out a FLAASH atmospheric correction on radiometricaly corrected GeoEye-1 spatial image (working within ENVI). I am getting the wrong results from my FLAASH correction and believe ...
1
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2answers
2k views

Using MODIS Data after FLAASH

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 ...