stilt.config.ModelParams#

class stilt.config.ModelParams(*, n_hours: int = -24, numpar: int = 200, hnf_plume: bool = True, rm_dat: bool = True, timeout: int | None = None, exe_dir: pathlib.Path | None = None, varsiwant: list[typing.Literal['time', 'indx', 'long', 'lati', 'zagl', 'sigw', 'tlgr', 'zsfc', 'icdx', 'temp', 'samt', 'foot', 'shtf', 'tcld', 'dmas', 'dens', 'rhfr', 'sphu', 'lcld', 'zloc', 'dswf', 'wout', 'mlht', 'rain', 'crai', 'pres', 'whtf', 'temz', 'zfx1']]=<factory>) → None[source]#: Simulation length, particle count, and particle output settings.

Parameters#

Parameter	Description	Default
`n_hours`	Length of each simulation, in hours. Negative runs backward in time.	`-24`
`numpar`	Number of particles released per simulation. More particles give a less noisy footprint and take longer to run.	`200`
`hnf_plume`	Apply a vertical Gaussian plume model to particles in the hyper near-field. This shrinks their effective dilution depth and raises the influence of fluxes close to the receptor. Requires `varsiwant` to include `dens`, `tlgr`, `sigw`, `foot`, `mlht`, and `samt`.	`True`
`rm_dat`	Delete HYSPLIT’s particle files (`PARTICLE_STILT.DAT` and `PARTICLE.DAT`) once they have been read, to save disk space.	`True`
`timeout`	Time limit for one `hycs_std` run, in seconds. A run that exceeds it is stopped and recorded as a failed simulation, and the worker moves on to the next one. Unset waits indefinitely, so a hung HYSPLIT process can hold a batch worker until its job ends.	`None`
`exe_dir`	Directory holding a custom `hycs_std` build to run in place of the one bundled with PYSTILT. It is saved with each trajectory’s parameters. A build that writes release-time (t = 0) rows to `PARTICLE_STILT.DAT` gives exact release heights for multipoint and slant receptors.	`None`
`varsiwant`	Particle variables `hycs_std` writes to the trajectory output. The default is the set footprints need, plus `pres` for pressure weighting.	`['time', 'indx', 'long', 'lati', 'zagl', 'foot', 'mlht', 'pres', 'dens', 'samt', 'sig...`