论文标题
比较TIDI视线风与图标弹力测量值的比较
Comparison of TIDI Line of Sight Winds with ICON-MIGHTI Measurements
论文作者
论文摘要
二十年来，热层 - 离子层 - 层的能量和动力学（定时）卫星一直在观察中层和较低的热层（MLT）区域。定时多普勒干涉仪（TIDI）使用四个正交望远镜测量中性风。 In this study, the line of sight (LOS) winds from individual telescopes are compared to the measurements from the Ionospheric Connection Explorer's (ICON's) Michelson Interferometer for Global High-resolution Thermospheric Imaging (MIGHTI) instrument from 90-100 km altitude during 2020. With the MIGHTI vector winds projected onto the LOS direction of each TIDI telescope, coincidences of the two datasets are found.这四个望远镜的性能不同，性能取决于卫星配置和局部太阳天顶角。 Coldside望远镜，望远镜1（Tel1）和望远镜2（Tel2）的测量方法与一般来说，在所有条件下，Tel2具有较高的相关系数。 Tel1的性能与向向后飞行过程中Tel2的性能相当，同时显示出大于向前飞行过程中平均风速的系统错误。望远镜3（TEL3）和望远镜4（Tel4）的暖侧LOS风在幅度差异很大，尤其是在夜间。与强大的风相比，Tel4测量值的相关性最弱，而Tel3性能在上升阶段与Coldside望远镜相当，但在降期间会恶化。基于TIDI/MIGHTI比较，生成了功绩数字，以量化不同配置中各个望远镜的测量质量。
The Thermosphere-Ionosphere-Mesosphere Energetics and Dynamics (TIMED) satellite has been making observations of the mesosphere and lower thermosphere (MLT) region for two decades. The TIMED Doppler Interferometer (TIDI) measures the neutral winds using four orthogonal telescopes. In this study, the line of sight (LOS) winds from individual telescopes are compared to the measurements from the Ionospheric Connection Explorer's (ICON's) Michelson Interferometer for Global High-resolution Thermospheric Imaging (MIGHTI) instrument from 90-100 km altitude during 2020. With the MIGHTI vector winds projected onto the LOS direction of each TIDI telescope, coincidences of the two datasets are found. The four telescopes perform differently and the performance depends on the satellite configuration and local solar zenith angle. Measurements from the coldside telescopes, Telescope 1 (Tel1) and Telescope 2 (Tel2), are better correlated with the MIGHTI winds in general with Tel2 having higher correlation coefficients across all conditions. The performance of Tel1 is comparable to that of Tel2 during backward flight while showing systematic errors larger than the average wind speeds during forward flight. The warmside LOS winds from Telescope 3 (Tel3) and Telescope 4 (Tel4) vary widely in magnitude, especially on the nightside. Compared with MIGHTI winds, the Tel4 measurements have the weakest correlation, while the Tel3 performance is comparable to that of the coldside telescopes during the ascending phase but deteriorates during the descending phase. Based on the TIDI/MIGHTI comparisons, figures of merit are generated to quantify the quality of measurements from individual telescopes in different configurations.
