When the user is at any point interested. The signal strength value that is close to where it will have the most value and intensity of the signal, the surrounding area will have less value, respectively.
When the user is at the focus point. The intensity of the signal near that point will be most valuable. And the signal intensity surrounding it is worth less, respectively.
When the user is in focus at any point. The signal intensity near the point that have value most. The intensity of the signal and the surrounding area will have less, respectively.