旅顺近地面大气折射率变化特征分析
Analysis of Atmospheric Refraction Variation near the Ground in Lyushun

使用2019年至2023年旅顺微波辐射计数据，研究了旅顺地区近地面折射率的季节和日变化。结果表明：旅顺近地面大气折射率的季节性变化是随气候条件改变而引起的，夏季的近地面折射通常比冬季具有更高的值；折射率日变化基本上是温湿压的函数，冬季折射率及其日变化是由折射率干项支配，夏季折射率干项对折射率日分布贡献较大，但湿项是夏季旅顺近地面折射率日变化的主要驱动因素。
The seasonal and diurnal variations of near-surface refractive index in Lyushun region from 2019 to 2023 were studied using microwave radiometer data from Lyushun. The results show that the seasonal variation is caused by climatic conditions, and the surface refraction in summer is usually higher than that in winter. The diurnal variation of refractive index is basically a function of temperature, humidity and pressure. The diurnal variation of refractive index and its diurnal variation are dominated by the dry index term in winter, and the dry index term contributes more to it in summer.