Data for a novel infrared imager for studies of hydroxyl and oxygen emissions in the mesopause above northern Scandinavia

Data contain hydroxyl and molecular oxygen emission measurements as well as complementary measurements presented in the paper “A novel infrared imager for studies of hydroxyl and oxygen nightglow emissions in the mesopause above northern Scandinavia” submitted to Atmospheric Measurement Techniques in 2023. The data were obtained with a new infrared imaging system (OH imager) for studies of nightglow emissions coming from hydroxyl (OH) and molecular oxygen (O2) layers in the mesopause region (80–100 km) over Kiruna (Sweden). File Fig2.xlsx contains data on 6 April 2023 shown in Figure 2 of the paper. The first column lists the time [UT, hours]. Raw intensities [digital numbers] of the atmospheric background, OH P1(2) and P1(4) lines are listed in the second, third and fourth column, respectively. File Fig3.xlsx contains data on the night 6/7 April 2023 shown in Figure 3 of the paper. The first column lists the time [UT, days]. The second column lists the dark-current noise [digital number]. File Fig4.xlsx contains OH(3-1) rotational temperature measurements made on the night 2/3 February 2023 shown in Figure 4 of the paper. The date and time (UT) are shown from the first to sixth column. The OH (3-1) rotational temperature [K] above Esrange is presented in the seventh column. File Fig5.xlsx contains OH(3-1) rotational temperature measurements shown in Figure 5 of the paper. The first column contains Day of Year 2023. The OH (3-1) temperature [K] above Kiruna and its standard deviation [K] are listed in the second and third column, respectively. File Fig6.nc is a NETCDF4 format file (https://www.unidata.ucar.edu/software/netcdf/). It contains maps around Kiruna of airglow emission intensities and temperature obtained by the OH imager on 16 February 2023. Intensities of the OH (3-1) P1(2) and P1(4) lines are given in the Rayleigh. Intensity of the O2 IR A-band at 1268.7 nm is given in a relative unit. The OH (3-1) rotational temperature at around 87 km altitude is in Kelvin. A detailed description of all the parameters is given in the metadata to Fig6.nc. The file can be read in Matlab, Python or other scientific software. File Fig7.xlsx contains OH(3-1) rotational temperature measurements shown in Figure 7 of the paper. The first column contains Day of Year 2023. Daily mean OH (3-1) temperature above Kiruna and its standard deviation are listed in the second and third column, respectively. File OH_imager_video_160223.avi contains a video sequence of the intensities and temperature maps on 16 February 2023 shown in Fig.6 of the present paper. The video demonstrates a motion of atmospheric gravity waves of various scales, preferentially moving from the south-west to the north-east.本数据集包含羟基（hydroxyl）与分子氧（molecular oxygen）的发射测量数据，以及2023年提交给《大气测量技术》（Atmospheric Measurement Techniques）的论文《一种用于研究斯堪的纳维亚北部中间层顶羟基与氧夜辉发射的新型红外成像仪》中的配套测量数据。这些数据通过一套新型红外成像系统（OH imager）获取，用于研究瑞典基律纳（Kiruna）上空中间层顶区域（80–100 km）内羟基（OH）与分子氧（O₂）层产生的夜辉发射。 文件Fig2.xlsx包含2023年4月6日的相关数据，对应论文中的图2。第一列为时间[世界时UT，单位：小时]。第二、第三、第四列依次列出大气本底、OH P1(2)谱线与OH P1(4)谱线的原始强度[数字计数（digital numbers）]。 文件Fig3.xlsx包含2023年4月6日至7日夜间的相关数据，对应论文中的图3。第一列为时间[世界时UT，单位：天]。第二列为暗电流噪声（dark-current noise）[数字计数]。 文件Fig4.xlsx包含2023年2月2日至3日夜间获取的OH(3-1)转动温度（rotational temperature）测量数据，对应论文中的图4。第一至第六列为日期与时间（世界时UT）。第七列为埃斯兰厄（Esrange）上空的OH(3-1)转动温度[单位：开尔文（K）]。 文件Fig5.xlsx包含论文中图5所示的OH(3-1)转动温度测量数据。第一列为2023年的年积日。第二、第三列依次列出基律纳上空的OH(3-1)温度[单位：开尔文（K）]及其标准差[单位：开尔文（K）]。 文件Fig6.nc为NETCDF4格式（NETCDF4）文件，详情可参考https://www.unidata.ucar.edu/software/netcdf/。该文件包含2023年2月16日通过OH成像仪获取的基律纳周边区域的气辉发射强度与温度分布图。其中OH(3-1) P1(2)与P1(4)谱线的强度单位为瑞利（Rayleigh），1268.7 nm处的O₂红外A带强度以相对单位表示，87 km高度附近的OH(3-1)转动温度单位为开尔文。所有参数的详细说明见Fig6.nc的元数据。该文件可通过Matlab、Python或其他科学软件读取。 文件Fig7.xlsx包含论文中图7所示的OH(3-1)转动温度测量数据。第一列为2023年的年积日。第二、第三列依次列出基律纳上空的日平均OH(3-1)温度及其标准差。 文件OH_imager_video_160223.avi包含2023年2月16日的强度与温度分布图视频序列，对应本文的图6。该视频展示了不同尺度的大气重力波（atmospheric gravity waves）运动，其传播方向优先为从西南向东北。