Hi Patrick,
Thanks for the suggestions.
1.)
=> I tried to check if Dmean was set to 0 value anywhere in the Bulkprop_fields
when using "psdModifiedGammaMassXmean()" . The only place it is '0' is at the
border of the cloudbox and outside the cloudbox.
=> This is how "pnd_fieldCalcFromParticleBulkProps()" expects to be set as
given in the documentation.
=> When I try making the border values a positive non-zero value. It gives me
this error.
Exception: Call to ARTS WSM pnd_fieldCalcFromParticleBulkProps failed with
error: *particle_bulkprop_field* allowed to contain non-zero values only inside
the cloudbox.
2.)
=> So, this looks to me like a bug that if I make borders zero valued then
"psdModifiedGammaMassXmean()" would have a problem, else if I make it non zero
then
"pnd_fieldCalcFromParticleBulkProps()" will give me problems.
=> Am I thinking this right?
3.)
=> Would you recommend me to change the source code in "PSD.CC" and change line
321 "if (ext_pars[1] <= 0) " and remove the "=" sign and build ARTS.
Would this be a fix to the problem?
Thanks,
Renish Thomas
________________________________
From: Patrick Eriksson <patrick.eriks...@chalmers.se>
Sent: Sunday, December 6, 2020 10:59 AM
To: Thomas,Renish <renish.tho...@colostate.edu>
Cc: arts users mi <arts_users.mi@lists.uni-hamburg.de>
Subject: Re: Fwd: Re: [arts-users] ARTS internally generated PND fields
Ranish,
> 1.) So, if I must set the scattering particle temperature to an arbitrary
> value after
> calling "pnd_fieldCalcFromParticleBulkProps", do I just override and assign
> 'pnd_agenda_input_t".
You got me wrong. You don't need to do anything. pnd_agenda_input_t is set
automatically
where needed.
> 2.) Can the particle temperature be set different than the ambient
> temperature?
Hardly. You can in principle try to "hack" pnd_agenda to set it to some other
value. But
why do you want to do it?
And please note that the psdModifiedGamma PSD-s do not even have a temperature
dependence.
So in this case I really don't see any reason.
The temperature also comes into play when interpolating scat_data, but that is
handled by
another part of ARTS. And over there, there is no option beside using the local
temperature.
> 3.) Do you recommend me to use internally generated PSD for MC or set it
> externally?
What you have started should work. So continue on this track.
(The alternative is to set pnd_field already in Python. Then you can ignore
particle_bulkprop_field ad pnd_agenda etc.
I can also mention that the PSD system in ARTS v2.5 soon will change. Simon is
making a
complete revision of the handling of particles.)
Bye,
Patrick
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