[GRASS-user] i.atcorr with Sentinel2

[Žofie Cimburová]

Dear Markus,
thanks for your reply, this is exactly what I need to know!

Best, Zofie

On Fri, Dec 15, 2017 at 5:09 PM, Markus Neteler <neteler at osgeo.org> wrote:

>
> On Dec 15, 2017 3:54 PM, "Žofie Cimburová" <zoficimburova at gmail.com>
> wrote:
> >
> > Dear all,
> > I am trying to use i.atcorr (GRASS 7.4) to apply atmospheric corrections
> for Sentinel 2 data. The documentation provides a great help, but there are
> two points I am not sure about -
> >
> > - I don't need the atmospheric correction to be applied to the whole
> scene, so I only imported a small clip of the scene to GRASS. What
> longitude and latitude shall I then specify in the 6S parameters?
>
> I'd use the center coordinates of the clipped area.
>
> > Or is it necessary to apply the corrections to the entire scene?
>
> No since it is a pixel based algorithm.
>
> > - How can I estimate the value of visibility (aerosol model
> concentration)?
>
> There are AERONET data online somewhere which might be the best choice.
>
> Markus
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/grass-user/attachments/20171215/0550dfdf/attachment.html>