Where is the sweeping line showing where the radar is pointing?
Prior to Doppler radars, the old analog type of radar continually transmitted a signal and its return would be projected on a screen as a line sweeping around the scope. As the radar made its sweep, the updated information would overwrite the older info. Also these older weather radars required an operator to manually tilt the antenna up and down whenever a vertical cross section of a storm was desired, or when the upper parts of a storm needed to be investigated.
