[GRASS-user] i.atcorr for GeoEye-1 and Worldview-3
vesnikos at gmail.com
Fri Jun 5 02:39:29 PDT 2015
On Fri, Jun 5, 2015 at 12:00 PM, Nikos Alexandris <nik at nikosalexandris.net>
> * Nick Ves <vesnikos at gmail.com> [2015-06-05 11:44:18 +0300]:
> > Take note for WV3  digital globe states that
> > "
> > WorldView-3 addresses this problem by being the first commercial imaging
> > satellite with an atmospheric sensor as part of its payload. During image
> > capture, the WorldView-3 atmospheric sensor is designed to detect the
> > presence of clouds, aerosols and water vapor at 31 meter resolution,
> > thereby measuring the exact atmospheric conditions corresponding to every
> > recorded image [...].
> > *DigitalGlobe has developed proprietary algorithms that use these
> > atmospheric measurements to normalize WorldView-3 imagery for
> > This normalization is called atmospheric compensation, which is
> > important for information extraction, such as change detection and
> > vegetation analysis because changes
> > *due to the atmosphere have been removed*.
> > "
> > Which seems to imply that their (of-the-shelf) products are already
> > cleaned from any atmospheric artistic.
> > Further confirmation on that would I think is needed.
> > 
> Or, maybe it's simply still "new" and calibration wroks are still
I cannot tell if its still new or its yet being callibrated, but they seem
to have shown the results of their method (DG - AComp) compared to FLAASH
and QUAC methods.
to see if you can make more than me.
From you above link there's this exception:
"Note that DG plans to implement a WV-3 atmospheric-model-based reflectance
correction, taking advantage of the WV-3 aerosol and water vapor CAVIS
bands; however, this correction was not available to apply to the data used
in this investigation."
If that's true and the AComp is not yet implemented to their end-user
products I don't think there's a way to atmo correct the images without
ground measurements from your part since they haven't published a spectral
responses table (as of yet that I am aware of)
> Nikos A
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