atmospheric_fieldIGRF

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

Use IGRF to compute the magnetic field at each point.

The IGRF model is a model of the Earth’s magnetic field. It is based on spherical harmonics and is only valid for a limited time period.

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

Note

The IGRF model is added as a functional object to the atmospheric field. If you need to retrieve the magnetic field, you must convert it to another type, use atmospheric_fieldSchmidthFieldFromIGRF(), which have been designed to support retrievals of the magnetic field via Legendre coefficients, or use atmospheric_fieldAbsoluteMagneticField(), which allow returning the magnitude of the magnetic field.

Author: Richard Larsson

Parameters:

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

  • time (Time, optional) – Time of data to use. Defaults to 2025-10-21 11:37:30.499520797 [IN]