| 地面风速(m/s) | 太阳辐射等级 | |||||
| 3 | 2 | 1 | 0 | −1 | −2 | |
| ≤1.9 | A | A-B | B | D | E | F |
| 2~2.9 | A-B | B | C | D | E | F |
| 3~4.9 | B | B-C | C | D | D | E |
| 5~5.9 | C | C-D | D | D | D | D |
| ≥6 | D | D | D | D | D | D |