Optical calibration, bathymetry, water column correction and bottom typing of shallow marine areas, using passive remote sensing imageries
Things we know
Things we don't

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
I keep digging
until suitable data
become available

Your comments are invited                            See you on 4SM blog


Lsw The problem with Lsw in an 8 bits image


   BPL The Brightest Pixels Line assumption is mostly trustworthy    1  2   3
Jerlov Jerlov's table of diffuse attenuation coefficients for downwelling irradiance is applicable to two-ways shallow water RS radiance      1  
Deglint Deglinting does a good job indeed!
It does remove sun/sky glint - and/or some adjacency effect situations
Panchro The panchromatic band of SPOT XS+P may be used as an extra multispectral band
 (see BoraBora      Sanaa      4SM_panchro)
Smoothing Smart Smoothing does a good job!  
Soil Line The Soils Line is trustworthy,  to a limited extent though: the RLBgb trick can help a lot!   



Bandset: wavelengths in nanometers





Landsat TM


Landsat ETM





-WLM??? -WLm??? -cWL???




Wavelengths at mid waveband are applicable,
with some caution though in the yellow-orange region of the solar spectrum.
Using the -CP argument is a must.