[GRASS-user] i.atcorr with Sentinel2

[Markus Metz]

On Tue, Jan 23, 2018 at 12:25 PM, Stefan Blumentrath <
Stefan.Blumentrath at nina.no> wrote:
>
> No problem. Any chance I can contribute to maintenance of create_iwave.py?
>
> What needs to be done? Take your latest changes into account?

nodata handling should be changed. In read_input(), missing values should
be set to zero. Then for each band, leading and trailing zeros would be set
to -1. This helps interpolate_band() to get the correct subrange.

For each band, create_iwave.py should print out the band name and the
wavelength as min - max. Care must be taken when finding reasonable min and
max wavelengths: find the max response, then go back while response >
threshold to find the min wavelength. Go forward while response > threshold
to find the max wavelength. As threshold I suggest 0.1 to eliminate noise
in the response values.

Markus M
>
>
>
> If you think it makes sense I will try to create a patch for adding S2B
to i.atcorr (would be a nice exercise and does not seem too complex)? Will
open a ticket and start working on it unless you tell me different.
>
>
>
> Cheers
>
> Stefan
>
>
>
>
>
>
>
> From: grass-user [mailto:grass-user-bounces at lists.osgeo.org] On Behalf Of
Markus Metz
> Sent: tirsdag 23. januar 2018 12.03
> To: Markus Neteler <neteler at osgeo.org>
> Cc: GRASS user list <grass-user at lists.osgeo.org>
> Subject: Re: [GRASS-user] i.atcorr with Sentinel2
>
>
>
>
>
> On Tue, Jan 23, 2018 at 11:51 AM, Markus Neteler <
> neteler at osgeo.org> wrote:
>
> >
> > On Tue, Jan 23, 2018 at 11:09 AM, Žofie Cimburová
> > <
> zoficimburova at gmail.com> wrote:
>
> > > Forgot to cc the list.
> > >
> > > The CSV and the cpp template:
> > >
> https://www.dropbox.com/sh/9cnhsl59kvmx4o1/AABwnEVHdxfW_PqrB5Xcpczda?dl=0
>
> >
> > Great! Would you mind to also convert the S2A table? AFAIK it got
> > updated due to recalibration compared to what we currently have.
>
> please wait a bit with creating the cpp template, create_iwave.py needs
some maintenance
>
> Markus M
>
>
>
> >
> > markusN
> > _______________________________________________
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> > grass-user at lists.osgeo.org
> > https://lists.osgeo.org/mailman/listinfo/grass-user
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