Radar Terms

Term Meaning     
Azimuth         : Angle along the earth horizon
Bearing         : Angle along the artificial horizon (deck)
Elevation         : Angle above or below the horizon
Range         : Distance along the plane established by the horizon
Slant Range : Distance along the true line of sight
True         : Angle in earth coordinates with true north as the reference
Relative         : Angle in deck-plane coordinates using vehicle heading as the reference
Rectangular : Cartesian coordinates typically known as X, Y, and Z
Spherical         : Polar coordinates typically known as range, bearing, and elevation

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