Quadrature, derived from Latinquadrare, is a term with various meanings:
in astronomy, the linetangent to an object's orbit defines the object's quadrature. For a circular orbit, this line is 90°, or a quarter of a circle, away from the center of the orbit.
in telecommunications, quadrature refers to signalA signal may refer to: an abstract element of information, or, more exactly, usually a flow of information (in either one or several dimensions). See Signal (information theory . in electronics) a signal is any physical phenomenon that can be modeled as as which are separated in phasePhase from the Greek phasis meaning 'appearance', has a number of related meanings in English. The phase of a waveform is the position of any peak or trough compared to the same feature on a second waveform. A phase of matter is a physically distinctive f by 90° (π/2 radianIn mathematics and physics, the radian is a unit of angle measure. It is the SI derived unit of angle. It is defined as the angle subtended at the center of a circle by an arc of circumference equal in length to the radius of the circle. Angle measures ins)
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