|
| 太阳辐射等级 | ||||
| 总云量/低云量 | 夜间 | h0 ≤ 15˚ | 15˚ < h0 ≤ 35˚ | 35˚ < h0 ≤ 65˚ | h0 > 65˚ |
| ≤4/≤4 | −2 | −1 | 1 | 2 | 3 |
| 5~7/≤4 | −1 | 0 | 1 | 2 | 3 |
| ≥8/≤4 | −1 | 0 | 0 | 1 | 1 |
| ≥5/5~7 | 0 | 0 | 0 | 0 | 1 |
| ≥8/≥8 | 0 | 0 | 0 | 0 | 0 |