What do the lines originating from the lower left corner of an RHI display correspond to?

The lines originating from the lower left corner of a Range Height Indicator (RHI) display correspond to transmitted beams. In this context, the RHI display is designed to present a vertical slice of radar data, where the lower left corner serves as the origin point for the radar's scanning elevation angles. These lines indicate the specific paths along which the radar signals are transmitted, allowing operators to visualize the coverage area and the altitude of targets within that slice.

Understanding this aspect of the RHI display is crucial for interpreting radar data effectively. By analyzing the transmitted beams as they extend upward, operators can make informed decisions regarding target location, altitude, and movement based on the radar returns captured along those lines. This directly aids in the assessment of weather conditions, tracking of aircraft, or monitoring of environmental phenomena.