Hi everyone,
When I use the month day hour as input of gensky or gendaylit, it will output Solar altitude and azimuth (like 28.4 -10.8). Based on the result I found that the horizontal coordinate system of Radiance is different from the general one. For example, for the horizontal coordinate system of packages (pysolar and pvlib) in Python, it is clockwise and the azimuth values for different directions are as follows.
Cardinal point Azimuth
| North | 0° |
|---|---|
| East | 90° |
| South | 180° |
| West | 270 |
But for Radaince, I found the azimuth values for different directions is as shown below. Am I right?
| Cardinal point | Azimuth |
|---|---|
| North | ±180° |
| East | -90° |
| South | 0° |
| West | 90 |
Best regards,
Hao