Nocturnal means of OH(3-1) airglow rotational temperatures from the mesopause region obtained with GRIPS 10 located at Tel Aviv University, Israel

The temperatures are derived from the rotational vibrational transition of the OH molecule originating from a thin layer in approximately 87 km centroid height. The spectra have been obtained with the Ground-based Infrared P-branch Spectrometer (GRIPS 10) located at Tel Aviv University (TAV: 32.11°E, 34.80°N) - a measurement station of the international Network for the Detection of Mesospheric Change (NDMC). It is jointly operated by the German Remote Sensing Data Center (DFD) of the German Aerospace Center (DLR) and the Department of Geophysical, Atmospheric and Planetary Sciences of Tel Aviv University (TAU). During routine operation one spectrum is obtained every 15 s, originating from a field of view of approximately 4.5° x 4.5° which corresponds to ca. 520 km2 in 87 km height, as the instruments points northwards with a zenith angle of ca. 40°. The covered wavelength range allows the observation of the OH(3-1) Q- and P-branches as well as of the OH(4-2) R- and Q-branches. Rotational temperatures are calculated using OH(3-1) P-branch emissions between 1520 nm and 1550 nm. For the estimation of a nocturnal mean value all samples of the nightly temperature time series are weighted according to their individual precision. Thus, mean temperatures between 1 and 2 K are lower compared to the unweighted arithmetic mean. A mean is only calculated, when at least two hours of observation time are available.本数据集的温度数据源自OH分子的转动-振动跃迁信号，信号来自质心高度约87 km的大气薄层。相关光谱由位于特拉维夫大学（Tel Aviv University，地理坐标：32.11°E，34.80°N）的地基红外P支光谱仪（Ground-based Infrared P-branch Spectrometer，GRIPS 10）获取——该仪器为国际中层大气变化探测网络（Network for the Detection of Mesospheric Change，NDMC）的观测站点之一。该设备由德国航空航天中心（German Aerospace Center，DLR）下属的德国遥感数据中心（German Remote Sensing Data Center，DFD）与特拉维夫大学地球物理、大气与行星科学系联合运维。常规运行期间，仪器每15秒采集一组光谱，其视场约为4.5°×4.5°；当仪器以约40°天顶角指向北方时，该视场在87 km高度处对应约520 km²的观测区域。该仪器的覆盖波段可观测OH(3-1)的Q支与P支，以及OH(4-2)的R支与Q支光谱信号。转动温度通过1520 nm至1550 nm波段内的OH(3-1) P支辐射信号计算得到。为估算夜间平均温度，夜间温度时间序列的所有样本将依据各自的测量精度进行加权处理。经加权后的平均温度较未加权算术平均值低1~2 K。仅当有效观测时长至少达到2小时时，方可计算夜间平均温度。