A method by which a DTV receiver that receives a terrestrial broadcast DTV signal may automatically determine the local time for the local terrestrial broadcast region, as well as DTV receivers that implements such a method, is described. The controller is configured to detect a pointer ID corresponding to a selected key of a first index node, translate the detected pointer ID to an index address by using a pointer table, and access a second index node corresponding to the selected key by using the index address. The upper dome includes an upper brow portion having a first maximum width and that has a concave recess defined therein. A microprocessor receives the output signal or output signals from the light sensor or light sensors and determines whether precipitation is present between the light sensor or light sensors and the light source or light sources.