Sunset quality grade

The quality grade of sunset glow is calculated by the meteorological department according to the local weather conditions and air quality. According to some public information, the quality grade of sunset glow is divided into 80, S, A and B, of which 80 is the most suitable quality grade for viewing sunset glow, and S indicates the appearance of flaming clouds. Different levels of sunset glow have different cloud types and durations. Understanding the types and characteristics of clouds is also very important for judging the quality level of sunset glow.