[GRASS-user] i.atcorr with Sentinel2

[Daniel Victoria]

It's been a while since I wrote that script. Glad to see it's still of use
:)

Anyway, I'm a bit overwhelmed so I won't be able to look at the changes
asked. But I'm glad Stefan can take a look. And I can help out in any
questions that might come up.

Cheers
Daniel

On Tue, Jan 23, 2018 at 11:50 AM Markus Metz <markus.metz.giswork at gmail.com>
wrote:

>
>
> On Tue, Jan 23, 2018 at 2:19 PM, Stefan Blumentrath <
> Stefan.Blumentrath at nina.no> wrote:
> >
> > OK, will give it a try.
> >
> The first part is more important because it 1) fixes the interpolation to
> 2.5 nm steps, and 2) helps iwave.cpp to load the response values.
> >
> > For the second part I am not sure if I properly understood where min –
> max wavelength for each band should be printed to.
> >
> > Do you mean to replace
> >
> >     # convert limits from nanometers to micrometers
> >
> >     lowerlimit = wavelengths[0]/1000
> >
> >     upperlimit = wavelengths[-1]/1000
> >
> >
> >
> > Or just as a screen output?
>
> Just a screen output to help update the manual
>
> >
> > You did not mean band value limits, right?
>
> No, e.g. in the manual is
>
> Sentinel2A Coastal blue band B1 (430nm - 457nm)
>
> and this range could be printed out to screen based on the actual
> response. This range can then be copied to the manual, making life a bit
> easier for the person updating the manual.
> >
> > Not sure I am of help/useful for fixing create_iwave.py, but I`ll do my
> best…
>
> Your help is welcome!
>
> Markus M
>
> >
> > Cheers
> >
> > Stefan
> >
> >
> >
> >
> >
> > From: Markus Metz [mailto:markus.metz.giswork at gmail.com]
> > Sent: tirsdag 23. januar 2018 13.02
> > To: Stefan Blumentrath <Stefan.Blumentrath at nina.no>
> > Cc: Markus Neteler <neteler at osgeo.org>; GRASS user list <
> grass-user at lists.osgeo.org>
> >
> >
> > Subject: Re: [GRASS-user] i.atcorr with Sentinel2
> >
> >
> >
> >
> >
> > 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
> > > > _______________________________________________
> > > > grass-user mailing list
> > > > grass-user at lists.osgeo.org
> > > > https://lists.osgeo.org/mailman/listinfo/grass-user
>
> _______________________________________________
> grass-user mailing list
> grass-user at lists.osgeo.org
> https://lists.osgeo.org/mailman/listinfo/grass-user
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/grass-user/attachments/20180123/0f189b2e/attachment-0001.html>