Return a callable function for computing nowcasts blending into an NWP forecast.
the linear blending of a nowcast method with other data (e.g. NWP data).
the salient blending of a nowcast method with other data (e.g. NWP data) described in [HCLK15]. The blending is based on intensities and forecast times. The blended product preserves pixel intensities with time if they are strong enough based on their ranked salience.
the STEPS stochastic nowcasting blending method described in [See03], [BPS06] and [SPN13]. The blending weights approach currently follows [BPS06].