Radar can detect various objects and phenomena depending on its design, operating frequency and sensitivity. Typically, radar is used to detect:
Radar can detect objects such as planes, ships, vehicles, weather phenomena (like rain, snow and hail), birds and even smaller objects like drones or debris. It can also be used to map terrain, monitor sea conditions, and track the movement of objects over time.
There are limits to what radar can detect. Radar waves can be absorbed or scattered by certain materials, particularly those that are not metallic or absorptive.
The radar may also be affected by environmental conditions such as heavy precipitation, dense fog or atmospheric disturbances.
The radar can determine the position, distance, speed, direction and size of detected objects based on analysis of reflected signals (echoes). By measuring the delay between transmission and reception of radar waves (range), Doppler shifts (velocity), and changes in signal resistance (reflectivity), radar systems can provide detailed information about targets within their operational range.
Yes, radar can detect people under certain conditions.
Human bodies can reflect radar waves, especially at higher frequencies. Radar-based systems like ground surveillance radars or through-the-wall imaging radars are designed to detect human presence by analyzing reflected signals. These systems are used in applications such as search and rescue operations, perimeter security and law enforcement.
Materials that are not well detected by radar include certain nonmetallic substances, especially those that are highly absorbent or transparent to radar waves.
For example, radar waves can penetrate through materials like wood, plastic, fabric, or some composites without generating significant reflections. Absorbing materials or those with low dielectric constants may not reflect radar waves effectively, making them less detectable compared to metals or materials with higher reflectivity