On Wed, Jun 27, 2018, 15:25 Markus Metz <markus.metz.gisw...@gmail.com> wrote:
> > > On Wed, Jun 27, 2018 at 3:06 PM, Roberta Fagandini < > robifagand...@gmail.com> wrote: > > > > > > > > 2018-06-27 14:24 GMT+02:00 Markus Metz <markus.metz.gisw...@gmail.com>: > >> > >> > >> > >> On Wed, Jun 27, 2018 at 2:16 PM, Roberta Fagandini < > robifagand...@gmail.com> wrote: > >> > > >> > I'm trying to create an automatic procedure to retrieve all the input > parameters for the control file of i.atcorr. > >> > I need py6S because I want to automatically read and compute AOT at > 550nm from an AERONET file. > >> > >> With AOT you mean aerosol optical thickness right? This is user input > to i.atcorr. There are various sources for AOT at 550nm, e.g. MODIS. > > > > > > Right! > > > >> > >> > >> > >> > >> Anyway, it is probably much easier to to write your own routine to read > the AERONET file and get the corresponding formula for AOT than to fight > with 51821 lines of Fortran source code that is numerically unstable. Maybe > I can help with getting AOT at 550nm from an AERONET file avoiding the > Fortran version of 6S. > > > > > > Ok but I'm not able to create this kind of routine on my own. If > someone, more expert than me, can help me in translating the 6S/Py6S > functions I can go on in this way otherwise for me it's easier to use the > fortran source code. > > Apparently the AERONET data are simple CSV files. You can import them with > r.in.xyz or v.in.ascii. > > Still, I think it is up to the user to decide on the source of AOT values. > AERONET is one of many possible sources. > +1 > Markus M > > > > Here [0] a link to my Github repository in which you can find the small > script that I wrote using the Py6S library to compute AOT at 550nm > > > > Roberta > > > > [0] > https://github.com/RobiFag/GRASS_clouds_and_shadows/blob/master/read_aeronet.py > > > >> > >> > >> Markus M > >> > >> > > >> > 2018-06-27 14:01 GMT+02:00 Moritz Lennert < > mlenn...@club.worldonline.be>: > >> >> > >> >> On 27/06/18 13:54, Roberto Marzocchi wrote: > >> >>> > >> >>> > >> >>> Il giorno mer 27 giu 2018 alle ore 13:47 Markus Metz < > markus.metz.gisw...@gmail.com <mailto:markus.metz.gisw...@gmail.com>> ha > scritto: > >> >>> > >> >>> Hi Roberta, > >> >>> > >> >>> On Wed, Jun 27, 2018 at 1:20 PM, Roberta Fagandini > >> >>> <robifagand...@gmail.com <mailto:robifagand...@gmail.com>> > wrote: > >> >>> > > >> >>> > Hi all! > >> >>> > I need to compile the 6S library in GRASS in order to > install the > >> >>> python library Py6S [0]. > >> >>> > >> >>> do you really need Py6S? Can't you use i.atcorr instead? > >> >>> > >> >>> > >> >>> She use Py6S to calculate imput for i.atcorr > >> >> > >> >> > >> >> That seems a bit overkill: why use Py6S to then use i.atcorr ? What > are you trying to get from Py6S ? > >> >> > >> >> Moritz > >> >> > >> > > > > > > _______________________________________________ > grass-dev mailing list > grass-dev@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/grass-dev
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