Bathymetry and water column correction
LANDSAT 8 OLIP 
at SanLorenzoChannel, Baja california
Image courtesy of the U.S. Geological Survey
 
Using the Panchromatic band for water column correction
to derive water depth and spectral bottom signature:

Landsat 8 OLIP bandset used for this work
Purple=1Blue=2Green=3PAN=4Red=5NIR=6 and SWIR1=7

Work done july 2018
GSD 15 m
 


 
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
 

4SM and ENVI

30/9/13
2 commentaires

How about implementing 4SM into ENVI?

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  • Yann MOREL dit :
    08/10/2013 à 12h 12min

    Bonjour Antoine, I have no plan yet. Just I figure that's the way to go: use IDL and connect with the ENVI community. 1 - First I need "a lot of guys from the RS optical community" to state their views. 2 - Then hopefully, I can attract interest from a group of sponsors who is willing to step forward with propper $$$ and technical support. 3 - Then of course, it shall require a show of interest on the part of EXELIS. 4 - Last, all that should happen before I start shaking and become oblivious of things: time is running.

  • Antoine Collin dit :
    30/9/2013 à 12h 12min

    Dear Yann, When will you implement the 4SM into ENVI? Will you directly collaborate with Exelis? I am indeed quite interesting in these results as a lot of guys from the RS optical community. All the best, Antoine.