igrf

pyarts.arts.igrf(z_field: pyarts.arts.Tensor3, lat_grid: pyarts.arts.Vector, lon_grid: pyarts.arts.Vector, t: pyarts.arts.Time = 2024-10-15 08:59:42.945813417, ell: pyarts.arts.Vector = 6378137 0.081819190842621) → Annotated[List[pyarts.arts.Tensor3], FixedSize(3)]

Compute the magnetic field according to IGRF

The coefficients are builtin and available for the years 2000-2020. No secular variation is taken into account beyond an interpolation between the available years.

Parameters:

  • z_field (Tensor3) – The altitude of the field points.

  • lat_grid (Vector) – The latitude grid.

  • lon_grid (Vector) – The longitude grid.

  • t (Time, optional) – The time of the magnetic field, default is the current time.

  • ell (Vector, optional) – The ellipsoid model. The default is [6378137, 0.081819190842621].

Returns:

  • u (Tensor3) – The u component of the magnetic field.

  • v (Tensor3) – The v component of the magnetic field.

  • w (Tensor3) – The w component of the magnetic field.