Sun Photometer Data (RAW) 2016 from Zeppelin Station, Ny-Ålesund, Svalbard (AWIPEV)

Voltages are measured by a sun photometer, type SP1a by Dr. Schulz & Partner GmbH in 17 wavelengths between λ = 369nm to 1023nm with a field of view of 1° × 1° and a time resolution of 1 minute. In winter 2012/13 a new sun photometer was installed and just 10 of 17 wavelengths remained in the same wavelength range. With the nine out of ten wavelengths optical parameters like the AOD are computed. The one, which is devoted to water vapor is omitted. The instrument is calibrated regularly in pristine conditions at Izaña, Tenerife, via Langley method.

The number of individual measurements differs between a few hundreds, especially in March and September, to up to 12,000 in early summer. No trend in each month can be seen comparing the amount of cloud-free measurements over the years. Only an annual cycle due to polar day and night is included in the data. Due to the instrument data is only available in clear sky conditions.
The raw measurement are given for the sun photometer at Zeppelin Station, operated by AWIPEV, for the time 8. March until 30. September 2020 with the instrument SP1A34.

本数据集采用舒尔茨博士合伙公司（Dr. Schulz & Partner GmbH）出品的SP1a型太阳光度计测量电压，该设备可在369nm至1023nm的17个光谱波段下开展观测，视场角为1°×1°，时间分辨率为1分钟。2012/2013年冬季，新安装的太阳光度计仅保留原17个波段中的10个波段，且波段范围保持不变；基于其中9个波段可计算得到气溶胶光学厚度（Aerosol Optical Depth, AOD）等光学参数，原10个波段中用于水汽探测的波段被剔除。该设备定期在特内里费岛伊萨尼亚（Izaña）的洁净大气环境下通过兰利法完成标定。

单批次有效测量次数差异显著：3月与9月的测量次数仅数百次，而初夏时段可高达12000次。对比多年间各月的无云观测样本量，未发现明显长期趋势，数据中仅包含由极地极昼、极夜引发的年周期变化特征。受设备观测条件限制，本数据集仅收录晴空条件下的观测数据。

本数据集提供了由AWIPEV运营的齐柏林站（Zeppelin Station）SP1A34型太阳光度计在2020年3月8日至9月30日期间的原始测量数据。