Optical calibration, bathymetry, water column correction and bottom typing of shallow marine areas, using passive remote sensing imageries

busy? see 4SM slides
SHALLOW WATER OPTICAL MODELING COURSE

    Your comments are invited               Busy? 4SM in 10 lines             See you on 4SM blog
VNC : let's work together live!


 
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
 
 
SHALLOW WATER OPTICAL MODELING COURSE

          Sorry, this material is over ten years old, and it shows
 Go for it :
please, use the navigation tools on the right hand side of each slide

Front page
        1 - Shallow water modeling
        5 - Maritorena' pioneering work
The remote sensing of shallow water areas
        6 - The simplified shallow water radiative transfer equation: RTE
      19 - Basics of under water optics
      29 - Jerlov's ten marine optical water types
      32 - The upwelling light field

        36 - Quotation of Jerlov               and of Kirk    
        38 - Simplifying assumptions
Operating the shallow water model
        48 - Deriving the ratio Ki/Kj
        50 - Water column correction
        54 - Deriving shallow water depths in meters
        60 - NOAA's Stumpf and Holdereid's new method 2003
        62 - Some conclusions
Modeling with N bands   a new method
        69 - Establish the Soil Line
        70 - Estimate the Brightest Pixels Line
        71 - Estimate spectral K
        72 - Compute Z and spectral bottom reflectance
        76 - Seatruth on computed depth
Comparison of ratio methods
Conclusion
References