Optical calibration, bathymetry, water column correction and bottom typing of shallow marine areas, using passivremote sensing imageries
WorldView 2 image Waimanalo Beach, Oahu, Hawaii islands
July 2011, 9721*9721, 2 m ground resolution, 19.4 km * 19.4 km,   courtesy of Ron Abileah
[back to Oahu]

This is image_4
of a series of 7 taken same day

e remote sensing imageries

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

work done Sept 30rd 2012
Deglinting performance is VERY bad

band 7

band 8
From band_7 to band_8
the plane travelled ~18 pixels northwards ~=36 m
At ~900 km/hr, this represents
a time lapse of ~0.14 seconds between
time of imaging bands 7, 5, 3 and 2
time of imaging bands 8, 6, 4 and 1

Deglinting performance
is VERY bad
because of banding


Computed depth

Sept 30rd 2012
nice -20  4SM.4.09  -Process  -Origin/Abileah           
-B/tclNe/cLM1 .5 .5     -nDR_50_ZDTM                   
-Model/v/runWV2/mask_3    -LL100