Look angle in radar terminology, the angle between the vertical plane passing through the radar antenna and the line between the antenna and object. [1] This concept is particularly relevant in satellite imaging, remote sensing, and radar systems. The look angle is typically defined in terms of azimuth and elevation angles.
- Azimuth Angle: The azimuth angle represents the horizontal angle between the reference direction (usually north) and the line of sight from the observer or sensor to the target. It is measured clockwise, usually in degrees, and ranges from 0° (north) to 360° (back to north). The azimuth angle provides information about the target's position in the horizontal plane.
- Elevation Angle: The elevation angle, also known as the zenith angle, is the vertical angle between the line of sight and the local horizontal plane. It is measured in degrees and ranges from 0° (at the horizon) to 90° (directly overhead). The elevation angle gives information about the target's height above the observer or sensor.
Together, the azimuth and elevation angles define the direction in which a sensor or observer is pointed in order to view a specific location on the Earth's surface or in space. These angles are crucial for satellite operators, remote sensing applications, and radar systems to accurately target and gather data from specific locations.