Dear ARTS Community,
I am experiencing some issues with extracting optical properties of scattering
particles such as
"ext_mat_spt<https://atmtools.github.io/arts-docs-master/docserver/variables/ext_mat_spt.html>"
and
"abs_vec_spt<https://atmtools.github.io/arts-docs-master/docserver/variables/abs_vec_spt.html>"
using the
"opt_prop_sptFromData<https://atmtools.github.io/arts-docs-master/docserver/methods/opt_prop_sptFromData.html>"
workspace method.
The Runtime Issue:
=> The python kernel crashes {"Aborted (core dumped)"} during runtime when the
"opt_prop_sptFromData<https://atmtools.github.io/arts-docs-master/docserver/methods/opt_prop_sptFromData.html>"
method is executed.
=> I am encountering two types of runtime errors based on za_grid and za_index.
=> During traceback, the runtime errors seem to be caused by checks on
"za_index" and "aa_index".
=> When za_grid or aa_grid is empty===runtime error=>
python: /arts/src/matpackI.h:509: Numeric ConstVectorView::operator[](Index)
const: Assertion `n < mrange.mextent' failed.
=> When za_grid or aa_grid is not empty===runtime error=>
python: /arts/src/array.h:215: base& Array<base>::operator[](Index) [with base
= PropagationMatrix; Index = long int]: Assertion `n < nelem()' failed.
The Scattering Data:
=> The scattering data is extracted from the "totally_random" scattering
particles "LiquidSphere_TotRand" from the ARTS single-scattering properties
database.
=> ws.scat_data.za_grid = array([0.0,0.2,.....,90,....,179.8,180]). Zenith
angle grid from scat_data.
=> ws.scat_data.aa_grid = array([ ]) Empty azimuth angle grid from scat_data.
My Questions:
=> What could be the reason for the runtime errors?
=> Should I assign the same "za_grid" from "scat_data" when using the
"opt_prop_sptFromData<https://atmtools.github.io/arts-docs-master/docserver/methods/opt_prop_sptFromData.html>"
method? or is the "za_grid" selection dependent on something else?
=> Should I leave the aa_grid empty as mentioned in the ARTS user guide for
totally random particles when using
"opt_prop_sptFromData<https://atmtools.github.io/arts-docs-master/docserver/methods/opt_prop_sptFromData.html>"?.
How would I do this without errors?
=> How do I select za_index intuitively? Should I loop through all elements or
do all the index values give game results for "totally_random" scattering
particles. An example or illustration would help. The lab and scattering
coordinate transformation is making the selection of za_grid and za_index vague
to me.
Misc Info:
=> ARTS Version: arts-2.5.0
=> Pyarts
Thanks very much!
Renish Thomas
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