py21cmsense.beam.GaussianBeam.b_eff

GaussianBeam.b_eff(frequency: Annotated[Quantity, PhysicalType('frequency')]) → Annotated[Quantity, Unit('sr')]

Get the effective beam area (Parsons 2014).

Defined as \((\int B(\Omega) d \Omega)^2 / \int B^2 d\Omega\).