A fixed tilt array orientation is described with an array tilt angle ($\theta_{T}$) and an array azimuth angle ($\theta_{A,array}$).

• For example, the orientation of a south-facing, fixed-latitude-tilt array in Albuquerque, NM (latitude = 35.05 degrees N) would have a tilt angle of 35.05 degrees from horizontal and an array azimuth of 180 degrees (using a compass direction convention).

Definition of Array Tilt Angle

Array Azimuth Definition