Radars can be used in the following activities:

• Identification of narcotics on passengers at airports or in aircraft: This is typically done using X-ray scanners or advanced imaging technologies like millimeter wave scanners, not traditional radar.

• Monitoring of precipitation: Radars, specifically weather radars, are commonly used to monitor precipitation. They can detect rain, snow, and other weather conditions by bouncing radio waves off precipitation particles.

• Tracking the migration of animals: Radars can be used to track the migration of birds and other animals. They are often used in ornithological studies to monitor bird migration patterns.