Radar is used to detect the presence of objects and determine three specific attributes. Which are they?

Radar is used to detect the presence of objects and determine three specific attributes. Which are they?

• A. Direction, altitude, and range
• B. Speed, direction, and range
• C. Position, magnitude, and velocity
• D. Color, size, and distance

Answer: (A)

Radar locates objects in three dimensions by giving three measurements: the direction to the object, how far away it is, and how high it is. The direction comes from the angle the radar beam is pointing when it detects a return. The range comes from the time delay between the transmitted pulse and the echo, which translates to distance. Altitude is determined from the elevation angle of the beam (and the measured range) or, if available, from transponder data that reports height. These three measurements together describe where the object is in space relative to the radar. Other attributes like speed, color, or size aren’t the basic location trio the radar provides in the usual sense; speed can be inferred with Doppler in some systems, but the fundamental location attributes are direction, range, and altitude.

Radar locates objects in three dimensions by giving three measurements: the direction to the object, how far away it is, and how high it is. The direction comes from the angle the radar beam is pointing when it detects a return. The range comes from the time delay between the transmitted pulse and the echo, which translates to distance. Altitude is determined from the elevation angle of the beam (and the measured range) or, if available, from transponder data that reports height.

These three measurements together describe where the object is in space relative to the radar. Other attributes like speed, color, or size aren’t the basic location trio the radar provides in the usual sense; speed can be inferred with Doppler in some systems, but the fundamental location attributes are direction, range, and altitude.