What's the distance (in frames) between the analysis and reference image? Is it the 'warmup frames' value? The 'analysis frames' alarm pixels show a "look-through" effect if a person walks by so the the reference frame must be some frames behind (that is correct of course). The question is how far away is it? And will the difference (in time/seconds) change by varying 'analysis fps'?
How often is the 'reference frame' updated? I'm trying to optimize sunbursts but i'm not sure how i can tweak the relation between refframe and analysis frame.