Question on the feasibility of studying wind field effects in 3D brightness temperature simulations

[zursoe]

Hello ARTS developers,

I am currently exploring the use of ARTS for a study involving 3D radiative transfer simulations. My goal is to investigate the potential impact of atmospheric wind fields on the simulated brightness temperatures.

I am new to the wind-related functionalities in ARTS and would appreciate some guidance. I have identified several functions and workspace variables that seem relevant to this task, but I am not entirely sure about their proper usage and how they interact. The specific items I'm looking at include:

wind_u_fieldIncludePlanetRotation()

WindFieldsCalc()

WindFieldsCalcExpand1D()

WindRawRead()

ppvar_wind

wind_u_field / wind_u_field_raw

wind_v_field / wind_v_field_raw

wind_w_field / wind_w_field_raw

jacobianAddWind()

retrievalAddWind()

My main question is about the feasibility of this type of study using ARTS. Is it possible to use these functions to simulate the influence of wind on the brightness temperature, for example, through the Doppler effect on absorption lines?

If this is feasible, could you please provide some guidance or point me towards any existing examples or documentation on how to correctly set up a forward model simulation that includes wind fields? Specifically, I am trying to understand the standard workflow for:

Reading or defining a 3D wind field.

Integrating it into the atmospheric state for a yCalc simulation.

Observing the resulting changes in the calculated brightness temperatures.

Any advice on the general methodology or clarification on the roles of the functions listed above would be extremely helpful.

Thank you for your time and for developing such a powerful tool.

Best regards.