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](https://pvpmc.sandia.gov/app/uploads/sites/243/2022/11/Array-Tilt-Angle-300x225-1.png)
![Array Azimuth Definition](https://pvpmc.sandia.gov/app/uploads/sites/243/2022/11/Array-Azimuth-Definition-300x225-1.png)