Definitions for "Phase angle"
Keywords:  sine, lag, angle, spacecraft, waveform
The angle expressing phase relation.
is the angle at any point of the sine wave of an AC power supply and varies between 0 to 360 deg. over a cycle.
The angle between the Sun, an object, and an observer. 0 degrees phase means the Sun is behind the observer.
The difference in phase between two sinusoidal varying quantities. (Course Material/EddyCurrents/Physics/impedance.htm)(Course Material/EddyCurrents/Instrumentation/impedanceplane.htm)