find_fieldlines_within_loop_footprint#

greensfield.util.find_fieldlines_within_loop_footprint(fieldlines, coordinate, wcs, radius=None, index=0)[source]#

Find fieldlines whose footpoints fall within the footprint of a visually-defined loop.

Parameters:

  • fieldlines (list of greensfield.models.Fieldline) – Fieldlines traced through field extrapolation to iterate over

  • coordinate (SkyCoord) – The coordinate defining the base of the visually-defined loop. If a single point, radius is used to define the circular footprint. If radius is None, it is assumed that this defines closed path of the loop footprint.

  • wcs (WCS) – The WCS of the image from which coordinate was derived.

  • radius (float, optional) – The radius of the circular loop footprint.

  • index (int, optional) – The index of the fieldline coordinate to use that defines the fieldline footpoint.

Returns:

bundle

Return type:

list of greensfield.models.Fieldline