atm_fieldSchmidthFieldFromIGRF

Workspace.atm_fieldSchmidthFieldFromIGRF(self, atm_field: pyarts3.arts.AtmField | None = None, time: pyarts3.arts.Time | None = None) → None

For forward calculations, this should be similar to atm_fieldIGRF().

What it does different is that it is 1) not a direct computations matching the IGRF field, instead averaging the Legendre coefficient matrices.

What it does very different is that it supports retrievals of the magnetic field Legendre coefficients.

This is very much a WIP and not well tested.

The IGRF model is available via Alken et al. [1].

Author: Richard Larsson

Parameters:

• atm_field (AtmField, optional) – An atmospheric field in ARTS. See atm_field, defaults to self.atm_field [INOUT]

• time (Time, optional) – Time of IGRF data to use. Defaults to 2025-11-20 12:26:44.496595215 [IN]