Noise model of ultraviolet light communication in sunny weather
Abstract
<p indent="0mm">The propagation of ultraviolet light through free space is affected by atmospheric turbulence and solar activity. This study derives the variations in the ultraviolet background radiation under clear sky conditions at different times and seasons to address the issue of reduced communication performance caused by strong background light. The effectiveness of the theoretical model is validated by comparing it with measured data. Furthermore, the theoretical model aligns well with the measured data under clear sky conditions, with a correlation coefficient of 0.93. The study also compares and analyzes the differences between the measured data and the theoretical model during overcast and hazy weather conditions. The distribution of ultraviolet noise in high-altitude regions is determined, and the variations in high-altitude noise are reconstructed based on the surface theoretical model. Experimental results indicate that for every <sc>1000 m</sc> increase in altitude, the daily variation trend of ultraviolet noise is the same, and the amount of ultraviolet radiation value increases by approximately 20%–23%. This study provides a theoretical foundation for space ultraviolet communication and provides empirical insights.</p>