To eliminate interrogator side-lobe suppression (ISLS), the ground radar site transmits the P2 signal in what type of radiating pattern?

To eliminate interrogator side-lobe suppression (ISLS), the ground radar site utilizes an omnidirectional radiating pattern when transmitting the P2 signal. An omnidirectional pattern allows the radar to transmit equally in all directions, ensuring that the signal covers the entire area without favoring any specific direction. This approach is essential in minimizing the potential for side-lobes that could interfere with the radar's ability to accurately receive responses from interrogators located at different angles.

By using an omnidirectional pattern, the radar ensures there are no significant blind spots or areas where signals could be weakened or missed due to directional biases. This enhances overall radar performance, effectiveness, and reliability in communication and detection tasks. In contrast, directional patterns, whether toward or away from lobes, could unintentionally amplify side-lobe signals or miss readings from certain angles, which is counterproductive in this context. Therefore, the choice of an omnidirectional radiating pattern is the most effective strategy to eliminate ISLS.