What is the function of electronic intelligence in border operations?

The function of electronic intelligence in border operations primarily centers around the collection of signals from electronic devices. This form of intelligence is crucial because it allows border patrol agents to intercept communications and gather important data from various electronic sources, such as radios, cell phones, and other devices used by individuals attempting to cross borders illegally or engage in criminal activities.

By focusing on signals, border operations can enhance their situational awareness and better understand the movements and intentions of individuals, which is vital for maintaining security and effectively managing border risks. This differentiated capability sets it apart from the other options listed, which involve methodologies that do not specifically pertain to the collection of signal intelligence. For example, gathering data from human sources pertains to human intelligence, processing visual data typically relates to imaging technologies, and analyzing open-source material deals with public information and does not involve direct interception of electronic communications.