Hi Leo,
What you have encountered can be shortly summarized as rte_pos only
existing inside the Agenda you call. You don't have it at hand anywhere
else. rte_pos also does not represent what you think it does, it is simply
a radiative transfer equation position and it can be anywhere inside or
outside of the atmosphere.
Before any other specific help can be given, you need to specify what
version of ARTS you are using? Are you running ARTS via python or via the
custom language interface? Is your entry point to the calculations via
`yCalc`?
Because those details matter for the answer you might need. Generally, if
you want to investigate the atmospheric path you are using, you will want
to generate a `ppath` and extract the relevant information. The way to do
that depends on the answers above and any attempt to answer this without
first filling in these details will give details that are perhaps not
needed.
If you are running it via `yCalc`, you get `y_pos` and `y_los` as outputs.
Those can be used to generate `rte_pos{,2}` and `rte_los` required for
`ppathCalc` to run. You can then extract the relevant information from the
generated `ppath` either via custom language commands or just by accessing
the data it holds in python. The documentation for accessing data in
ppath for the latest version of ARTS available via conda-forge can be found
here:
https://atmtools.github.io/arts-docs-master/stubs/pyarts.arts.Ppath.html#pyarts.arts.Ppath
//Richard
Den tis 28 nov. 2023 kl 15:51 skrev <[email protected]>:
> Dear ARTS community,
>
> I am a new user of ARTS. One of my tasks is to simulate passive
> microwave radiometers onboard low Earth orbit satellite. To this end,
> I would know which region of Earth surface the satellite is looking
> at. I set the satellite position through "sensor_pos" and the line of
> sight of the satellite through "sensor_los". When I try to get and
> save on a XML file the geographical position for starting radiative
> transfer calculation (i.e. rte_pos), I get the following error:
>
> Method WriteXML needs input rte_pos but it is uninitialized.
>
> Can anyone help me on this? Many thanks.
>
> Best regards,
> Leo Pio
>
>
>
