Which of the following is a key characteristic of the Janus array?

The Janus array is characterized by its four beam configuration, which allows it to effectively gather data from multiple angles simultaneously. This capability enhances its ability to track targets and improves resolution and accuracy in radar measurements. The four beams can be employed in various operational modes, which can include surveillance and tracking applications, resulting in more efficient radar performance.

This approach contrasts with single, dual, or triple beam configurations that limit the radar system's ability to gather information from different perspectives at once. The multiple beams in a Janus array contribute significantly to its versatility and effectiveness in a range of monitoring and detection scenarios. The design inherently supports advanced scanning capabilities, making it a critical feature for modern radar systems.