论文标题
天文云覆盖分析的天空质量表和卫星相关性
Sky Quality Meter and satellite correlation for the night cloud cover analysis at astronomical sites
论文作者
论文摘要
考虑到典型的观察时间约15分钟，并且具有夜间云覆盖的统计数据，对夜间云覆盖物的分析对于实时观察非常重要。在本文中，我们使用SQM（天空质量计）对La Silla和Asiago（Ekar天文台）天空进行高分辨率的时间分析：分别为3分钟和5分钟。我们调查了天空自然贡献的年度时间演变在不受人造光（Alan）影响的站点（艾伦）和一个高度影响的地点。我们还在GON和Aqua卫星数据和基于地面的SQM数据之间建立了相关性，以确认SQM数据和云覆盖率之间的关系。我们开发了一种允许使用SQM进行夜间云检测的算法，我们达到了La Silla的97.2 \％的相关性和Asiago的94.6 \％的相关性，并且由GOOS和Aqua Satellites检测到夜间云盖。我们的算法还对光度法（PN）和光谱夜（SN）进行了分类。我们在2018年在La Silla的晴朗夜晚的总百分比为59.1 \％Pn和21.7 \％SN。各个EKAR天文台值为31.1 \％\％Pn，24.0 \％\％\％\％\％\％\％\％\％\％\％\％\％\％。应用于SQM网络将涉及长期统计数据和大数据预测模型的开发，用于现场测试和实时天文观察。
The analysis of the night cloud cover is very important for astronomical observation in real time, considering a typical observation time of about 15 minutes, and to have a statistics of the night cloud cover. In this paper we use the SQM (Sky Quality Meter) for high resolution temporal analysis of the La Silla and Asiago (Ekar observatory) sky: 3 and 5 minutes respectively. We investigate the annual temporal evolution of the natural contributions of the sky in a site not influenced by artificial light at night (ALAN) and one highly influenced respectively. We also make a correlation between GOES and AQUA satellites data and ground-based SQM data to confirm a relationship between the SQM data and cloud cover. We develop an algorithm that allows the use of the SQM for night cloud detection and we reach a correlation of 97.2\% at La Silla and 94.6\% at Asiago with the nighttime cloud cover detected by the GOES and AQUA satellites. Our algorithm also classifies the photometric (PN) and spectroscopic nights (SN). We measure 59.1\% PN and 21.7\% SN for a total percentage of clear nights of 80.8\% at La Silla in 2018. The respective Ekar observatory values are 31.1\% PN, 24.0\% SN and 55.1\% of total clear nights time. Application to the SQM network would involve the development of long-term statistics and big data forecasting models, for site testing and real-time astronomical observation.
