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Last Post 07 Sep 2014 07:56 PM by  anon
FLAASH Trouble with Landsat 8
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anon



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07 Sep 2014 07:56 PM
    Hi, Every time I tried to use ENVI FLAASH in the atmospheric correction of Landsat 8 OLI data, I got Band 6 (SWIR 1) with zero reflectance values as the following: Filename: C:\Users\Mahmoud\Desktop\LC8\proc\sr Dims: Full Scene (58,224,061 points) Basic Stats Min Max Mean Stdev Band 1 -2478 7641 671.769534 557.361421 Band 2 -165 7185 638.778730 600.759837 Band 3 -922 7123 800.971315 893.351144 Band 4 -541 7271 961.129809 1152.219892 Band 5 -173 7188 1064.288001 1316.381351 Band 6 0 0 0.000000 0.000000 Band 7 -29 2199 361.904960 480.171756 This is the FLAASH tempelate: ; ;ENVI FLAASH PARAMETERS TEMPLATE (5.1) ;Written Mon Sep 08 03:14:27 2014 ; ; Project Parameters enviacc.prj.radiance_file = C:\Users\Mahmoud\Desktop\LC8\proc\rsbil.dat enviacc.prj.reflect_file = C:\Users\Mahmoud\Desktop\LC8\proc\sr enviacc.prj.filter_func_file = C:\Program Files\Exelis\ENVI51\classic\filt_func\landsat8_oli.sli enviacc.prj.filter_func_file_index = 0 enviacc.prj.water_band_choice = 1.13 enviacc.prj.red_channel = 4 enviacc.prj.green_channel = 3 enviacc.prj.blue_channel = 1 enviacc.prj.water_abs_channel = 0 enviacc.prj.water_ref_channel = 0 enviacc.prj.kt_upper_channel = 7 enviacc.prj.kt_lower_channel = 4 enviacc.prj.kt_cutoff = 0.0800 enviacc.prj.kt_ratio = 0.5000 enviacc.prj.cirrus_channel = 0 enviacc.prj.water_retrieval = 0 enviacc.prj.user_stem_name = flaash_ enviacc.prj.modtran_directory = C:\Users\Mahmoud\Desktop\LC8\proc\ ; ; MODTRAN Parameters enviacc.modtran.visvalue = 40.0000 enviacc.modtran.f_resolution = 15.0000 enviacc.modtran.day = 22 enviacc.modtran.month = 2 enviacc.modtran.year = 2014 enviacc.modtran.gmt = 8.1281 enviacc.modtran.latitude = 24.5478 enviacc.modtran.longitude = 35.1096 enviacc.modtran.sensor_altitude = 705.0000 enviacc.modtran.ground_elevation = 0.5000 enviacc.modtran.view_zenith_angle = 180.0000 enviacc.modtran.view_azimuth = 0.0000 enviacc.modtran.atmosphere_model = 1 enviacc.modtran.aerosol_model = 6 enviacc.modtran.multiscatter_model = 2 enviacc.modtran.disort_streams = 8 enviacc.modtran.co2mix = 390.0000 enviacc.modtran.water_column_multiplier = 1.0000 ; ; Image Parameters enviacc.img.nspatial = 7541 enviacc.img.nlines = 7721 enviacc.img.data_type = 4 enviacc.img.margin1 = 0 enviacc.img.margin2 = 0 enviacc.img.nskip = 0 enviacc.img.pixel_size = 30.0000 enviacc.img.sensor_name = Landsat-8 OLI ; ; Analysis Parameters Thanks to all Mahmoud

    MariM



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    08 Sep 2014 09:01 AM
    This is a known issue with the filter function in the ENVI Classic directory. It will be fixed in ENVI 5.2 but for now you can instead point to the filter function in : C:\Program Files\Exelis\ENVI51\resource\filterfuncs\landsat8_oli.sli You can set this in the Multispectral Settings of the FLAASH dialog.

    Deleted User



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    09 Sep 2014 03:01 AM
    You are the best Finally, it works well Thank you
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