Optical calibration, bathymetry, water column correction and bottom typing of shallow marine areas, using passive remote sensing imageries
 
Greenland ice shelf
EO1-HYPERION 26 bands image, July 30th 2008
EO1-ALI 6 bands image, July 31rst 2008
A Landsat ETM 4 bands image, August 3rd 2001
from USGS/Glovis
Work done in 2010

return to 4SM Study Cases
see Sneed & Hamilton 2007
see Tedesco & Steiner 2011
A case study in 4SM optics in an all-ice environment:
Jakobshavn Ablation Region

see cryoconite
see wavelengths



 


 
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
 


HYPERION EO1H0080122008212110K3
ALI EO1A0080122008212110K3
ETM_006_013_2001-08-03


more work needed
about the question of operational wavelengths