Syntax_SCL 

Syntax  for the -SCL argument:
Scaling factor from Raw U16 data into U8 data

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1 - NO NEED for field data, nor for atmospheric correction
2 - this is demonstrated in this website, using a variety of hyper/multi spectral data
 
Requirements are
1 - homogeneous water body and atmosphere
2 - some coverage of optically deep water
3 - some coverage of dry land
 
Problems are
1 - the precision on estimated depth is found wanting, because the noise-equivalent change in radiance  of accessible data is too high for shallow water column correction work 
2 - radiance data should be preprocessed by the provider at level 1 in order to improve S/N ratio
3 - exponential decay: the deeper/darker the bottom, the poorer the performances
 
So
I keep digging
until suitable data
become available
 
Syntax_SCL
Syntax  for the -SCL argument:
Scaling factor from Raw U16 data into U8 data
-SCL/00110/00140/00130/00130
  • 16U or 16S values to be scaled to  the range 0-255 through the scaling process
    • Shall first be multiplied by 10 before any use: SCL=SCL*10
    • Scaling is then obtained by computing Ls=Ls*255/SCL
  • The values represent the brightness of clean bright beachintheimage:
    • you adjust them a required.
    • what you want is that BOA radiances are scaled to ~200
    • for comfortable display/enhancement on screen in the 0-255 range.
For 16U data, you can specify -SCL/025.5/025.5/025.5/025.5
this shall achieve NO scaling: data shall be left un-scaled