Airglow and Auroral Studies of the Earth's Upper Atmosphere

这项拟议的高层大气区域地面光学分析和建模方案涉及重要的雪松目标。研究领域包括：1)高层大气动力学及其与F区等离子体的耦合；2)630 nm气辉损耗和电离层羽流；3)中间层和低热层动力学；4)地冕氢动力学；5)增敏法布里-珀罗涉仪(FPI)的研制。秘鲁阿雷基帕的FP I将与Jicamarca非相干散射雷达(ISR)同时进行测量，以详细确定赤道热层-F区等离子体耦合的高度变化。将分析1983-1990年的FPI数据库，以找出高层热层风和温度对太阳通量(Sa指数)和地磁活动(Kp、Ap、Ae指数)变化的响应。测绘光度计将确定630纳米气辉损耗的形态及其与电离层羽流的关系(由Jicamara ISR测量)。在宾夕法尼亚州的Laurel Ridge，150和100 nm口径的fpi(由ccd探测器改进)将分别确定地冕氢动力(捕获的热、弹道和逸散成分在Ha线)和中层顶低热层动力学(通过OH和557.7 nm线)。在马萨诸塞州米尔斯通山，在D·P·西普勒的指导下，协调人FP I和ISR将继续进行中纬度热层-电离层动量和能量耦合的研究。

This proposed program of ground-based optical analyses and modeling of upper atmospheric regions addresses important CEDAR objectives. The areas of investigation are: 1) upper atmosphere dynamics and coupling to the F-region plasma; 2) 630 nm airglow depletions and ionospheric plumes; 3) mesosphere and lower thermosphere dynamics; 4) geocoronal hydrogen dynamics; and 5) enhanced-sensitivity Fabry-Perot interferometer (FPI) development. The Arequipa, peru FPI will be used in simultaneous measurements with the Jicamarca incoherent scatter radar (ISR) for detailed determinations of the height variation of the equatorial thermosphere - F-region plasma coupling. The 1983- 1990 FPI data base will be analyzed to find the response of the upper thermosphere wind and temperatures to changes in solar flux (sa index) and geomagnetic activity (Kp, Ap, AE indicies). A mapping photometer will determine the morphology of 630 nm airglow depletions and their association with ionospheric plumes (measured by the Jicamarca ISR). AT Laurel Ridge, PA, the 150 and 100 nm aperture FPI's (improved by CCD detectors) will determine, respectively, geocoronal hydrogen dynamics (trapped thermal, ballistic and escape components cia the Ha line) and mesopause-lower thermosphere dynamics (via OH and 557.7 nm lines). At Millstone Hill, MA, under the direction of D. P. Sipler, the coordinator FPI and ISR studies of midlatitude thermosphere -ionosphere momentum and energy coupling will continue.