The failure of using SWIR atmospheric correction method for Landsat 8 image

[liugers11]

Hi,
      I try to use the SWIR method for the atmospheric correction of Landsat 8 image.
            The set is "aer_opt=-2 aer_rrs_long=-1.0 aer_rrs_short=-1.0 aer_swir_long=-1  aer_swir_short=-1 aer_wave_long=2201 aer_wave_short=1609"
            I have  cancelled all the  mask:
                The set is   "MASKLAND=0 maskbath=0 MASKCLOUD=0 maskglint=0 masksunzen=0 masksatzen=0 maskhilt=0 maskstlight=0"
            and  also set the "tauamax =2.0".
     
      However, the atmospheric correction still failed.
      Does it because the high latitude or solar zenith angle ?
      The latitude of the study area is nearly 50°N and the solar zenith angle is nearly 40°. I have tried many times but the retrieved Rrs_nnn or AOT_nnn are "NaN".
The water of my study area is clear. So I think it met the hypothesis of SWIR method. Thank you very  much.
Best Wishes
Ge

[OB.DAAC - SeanBailey]

It is very likely not due to the geometries, but more information is needed to diagnose the issue.  To aid you in identifying why the retrievals fail, look at the l2_flags to see which are set.
Did you try the defaults?  You may also want to try processing with a fixed aerosol, a white aerosol or no aerosol correction. 

Sean

[liugers11]

Hi, Sean
       
       Sorry for relying so late.  I collected in situ data in the last month.
       I have found the solution. It needs to set "proc_ocean=2". The extraction rule of OLI in SeaDAS is too strict for these turbid lakes.
       Thank you very much.

Best Wishes
Ge