TIMED Doppler Interferometer: Overview and recent results
TIMED Doppler Interferometer: Overview and recent results
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DOI：
10.1029/2005ja011484
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发表时间：
2006-10
影响因子：
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通讯作者：
T. Killeen;Qian Wu;S. Solomon;D. Ortland;W. Skinner;R. Niciejewski;D. Gell
中科院分区：
文献类型：
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作者：
T. Killeen;Qian Wu;S. Solomon;D. Ortland;W. Skinner;R. Niciejewski;D. Gell
[1]热层-电离层-中间层能量学和动力学（TIMED）卫星携带一个边缘扫描法布里-珀罗干涉仪，用于对全球高层大气风和温度进行遥感测量。这种仪器被称为定时多普勒干涉仪，或TIDI。本文概述了TIDI仪器的设计、在轨性能、操作模式、数据处理和反演程序，并总结了迄今为止的风场结果。白天和夜间中间层和低热层/电离层的中性风是在TIDI上测量的，使用的是四个单独的扫描望远镜，这些望远镜收集来自高倾角TIMED航天器冷侧和暖侧各种高层大气气辉层的光。使用具有足够光谱分辨率的超稳定平面标准具法布里-珀罗系统对光进行光谱分析，以确定从MLTI发出的原子和分子发射的多普勒线特性。来自所有四个望远镜和内部校准场的光通过标准具，并使用圆线干涉仪光学（克利奥）在单个图像平面检测器上组合。四个地球物理场提供了卫星路径两侧的正交视线测量，并对这些测量进行分析，以产生MLTI中矢量风的高度分布。这里提供的TIDI风测量来自分子氧（0-0）波段，覆盖海拔85-105公里区域。独特的TIDI设计允许比以前的高倾角卫星测风仪器更广泛地覆盖风结构的当地时间。TIDI的操作性能一直是标称的，除了两个异常：（1）由低水平光泄漏引起的背景白色光高于预期，以及（2）冷光学表面上的冰沉积。这两种异常现象都得到了很好的理解，仪器模式和数据分析技术也得到了调整，以减轻它们对数据质量的影响。用于获得风的分析技术进行了说明。从TIMED的多个偏航周期的TIDI风测量已被用来提取迁移的周日和半日潮。迁移潮的结果进行了比较，从全球尺度波模式（GSWM）的预测，从高层大气研究卫星，高分辨率多普勒成像仪（HRDI）仪器的结果。还将TIDI风测量结果与地面流星雷达观测结果进行了比较，结果一致。
[1] The Thermosphere-Ionosphere-Mesosphere Energetics and Dynamics (TIMED) satellite carries a limb-scanning Fabry-Perot interferometer designed to perform remote-sensing measurements of upper atmosphere winds and temperatures globally. This instrument is called the TIMED Doppler Interferometer, or TIDI. This paper provides an overview of the TIDI instrument design, on-orbit performance, operational modes, data processing and inversion procedures, and a summary of wind results to date. Daytime and nighttime neutral winds in the mesosphere and lower thermosphere/ionosphere (MLTI) are measured on TIDI using four individual scanning telescopes that collect light from various upper atmosphere airglow layers on both the cold and warm sides of the high-inclination TIMED spacecraft. The light is spectrally analyzed using an ultrastable plane etalon Fabry-Perot system with sufficient spectral resolution to determine the Doppler line characteristics of atomic and molecular emissions emanating from the MLTI. The light from all four telescopes and from an internal calibration field passes through the etalon and is combined on a single image plane detector using a Circle-to-Line Interferometer Optic (CLIO). The four geophysical fields provide orthogonal line-of-sight measurements to either side of the satellite's path and these are analyzed to produce altitude profiles of vector winds in the MLTI. The TIDI wind measurements presented here are from the molecular oxygen (0-0) band, covering the altitude region 85–105 km. The unique TIDI design allows for more extended local time coverage of wind structures than previous wind-measuring instruments from high-inclination satellites. The TIDI operational performance has been nominal except for two anomalies: (1) higher than expected background white light caused by a low-level light leak and (2) ice deposition on cold optical surfaces. Both anomalies are well understood and the instrumental modes and data analysis techniques have been adjusted to mitigate their effects on data quality. The analysis techniques used to derive winds are described. The TIDI wind measurements from multiple yaw cycles of TIMED have been used to extract migrating diurnal and semidiurnal tides. The migrating tide results are compared with predictions from the Global Scale Wave Model (GSWM), and results from the Upper Atmospheric Research Satellite, High Resolution Doppler Imager (HRDI) instrument. TIDI wind measurements are also compared with ground-based meteor radar observations, showing consistent results.