Pengwang,
sorry for my partial answer. Recently I compiled ARTS 2.5 and I had a
similar issue concerning the absorption lookup table. Richard Larsson,
helped me replying to my mail sent in this mailing list, suggesting to
add abs_xsec_per_speciesAddLines into my cross-section agenda.
He also added:
"We are currently in a transition in the 2.5-branch of moving away
from abs_xsec_agenda entirely. There are some lingering problems when
using lookup table calculations at this time. Mainly, since the line
calculations should happen in propmat_clearsky_agenda now, they are
not part of any of the default cross-section agendas as in the past.
The lookup generation interface is currently under active development,
so this interface might change in the near future."
Best regards,
Mattia
Pengwang Zhai <pwz...@umbc.edu> ha scritto:
Thanks, Mattia. Would you advise how TestAbs.arts can be revised to
include line-by-line calculation?
Note that the behavior of TestAbs.arts is different in arts2.3,
which does calculate line-by-line absorption coefficients.
I do not want continua, as I am mainly interested in the visible
spectra, which is out of most of those continuum models. Based on my
experience with previous arts version, arts does not check the
spectrum limits for the continuum models. I am not sure whether arts
2.5 has been improved on this.
Pengwang
On Feb 10, 2022, at 9:46 AM, mattia.sabat...@artov.ismar.cnr.it wrote:
Hi Pengwang,
the controlfile TestAbs.arts, in line 15, has the following:
Copy(abs_xsec_agenda, abs_xsec_agenda__noCIA)
I checked in controlfiles/general/agendas.arts for what
abs_xsec_agenda__noCIA does:
AgendaCreate( abs_xsec_agenda__noCIA )
AgendaSet( abs_xsec_agenda__noCIA ){
abs_xsec_per_speciesInit
abs_xsec_per_speciesAddConts
}
Therefore the agenda calculates absorption for continua tag only
(see
https://atmtools.github.io/arts-docs-master/docserver/methods/abs_xsec_per_speciesAddConts.html). You selected H2O, and by doing this my guess is that you are not considering continuum, as it is written in lines 36-37 of
TestAbs.arts.
I hope that this will help you,
Mattia
Pengwang Zhai <pwz...@umbc.edu> ha scritto:
Hello, ARTS community,
I downloaded and compiled the latest version of arts. Now I tested
the the creation of abs_lookup with the example control file
located in:
arts/controlfiles/artscomponents/absorption/TestAbs.arts
I only modified two occurrences of:
abs_speciesSet( species=[ "H2O-PWR98",
"O2-PWR93",
"N2-SelfContStandardType" ] )
to:
abs_speciesSet( species=[ "H2O" ] )
and run
arts TestAbs.arts
The resultant abs_lookup are all ZEROs.
Any help?
More background information: I used arts 2.3 to create abs_lookup
for H2O, CO2, etc. in the visible by reading from HITRAN 2012. The
baseline example was TestAbs.arts provided by the arts
installation. Now I need to revisit the calculation based on
HITRAN 2020, and the lookup table calculation seems not working
with arts 2.5. I greatly appreciate it if you could provide a
working example on how to create a abs_lookup with arts 2.5.
Pengwang
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