[GRASS-user] i.atcorr for GeoEye-1 and Worldview-3

Moritz Lennert mlennert at club.worldonline.be
Thu Jun 4 05:19:08 PDT 2015

On 04/06/15 13:47, Nikos Alexandris wrote:
> * Moritz Lennert <mlennert at club.worldonline.be> [2015-06-04 11:38:04 +0200]:
>> On 03/06/15 15:06, Markus Neteler wrote:
>>> On Wed, Jun 3, 2015 at 6:56 AM, Kamhul Camhol <monk_purple at yahoo.com> wrote:
>>>> Hello. I'm quite new with GRASS but I need to atmospherically process
>>>> high-resolution imagery with i.atcorr. I have three images Quickbird,
>>>> GeoEye-1 and Worldview-3 imagery of a single scene across three time
>>>> periods. For Quickbird, I have all the data needed but basing from the
>>>> following manual GRASS GIS manual: i.atcorr
>>>> there appears to be no values for two required inputs for GeoEye-1 and
>>>> Worldview-3.
>>> Yes, at time only Quickbird but not GeoEye-1 and Worldview-3 are supported.
>>>> These are geometrical conditions and band. May I know if GRASS
>>>> has updated the i.atcorr manual to include these sensors as well? Can I use
>>>> the values of Worldview-2 for Worldview-3? Or is there any other way to do
>>>> the atmospheric correction for these two sensors?
>>> We would be happy to add support for these sensors. We need the
>>> spectral filter curves for that, in order to integrate them in
>>> i.atcorr.
>> Do I understand correctly that you would need the numbers behind the
>> curves in this document:
>> https://www.digitalglobe.com/sites/default/files/DigitalGlobe_Spectral_Response_1.pdf
>> ?
> Yes Moritz, that is very relevant!  They updated the document I think (it wasn't
> there on Summer 2013 plus a few months later -- the properties of this
> file indicate October 2014).

I don't have the time to do this now, but using something like [1], it 
should be easy to quickly get an approximate dataset from the graphs in 
that document.


[1] http://arohatgi.info/WebPlotDigitizer/

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