Investigations of thermospheric‐ionospheric dynamics with 6300‐Å images from the Arecibo Observatory
Investigations of thermospheric‐ionospheric dynamics with 6300‐Å images from the Arecibo Observatory
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DOI：
10.1029/96ja02786
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发表时间：
1997-04
影响因子：
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通讯作者：
M. Mendillo;J. Baumgardner;D. Nottingham;J. Aarons;B. Reinisch;J. L. Scali;M. Kelley
中科院分区：
文献类型：
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作者：
M. Mendillo;J. Baumgardner;D. Nottingham;J. Aarons;B. Reinisch;J. L. Scali;M. Kelley
1993年1月19日至28日以及1995年2月21日至8月22日期间，在波多黎各的阿雷西博利用全天空、像增强电荷耦合器件（CCD）相机系统，并结合雷达、电离层探测仪和全球定位系统（GPS）诊断系统进行了试点观测。这些观测代表了阿雷西博首次将成像仪用于长时间的F区观测的活动模式操作。1993年1月期间（所谓的“10天运行”）获得了丰富的重力波特征数据集，这可能是F区热层波列特性直接成像的首个案例。1995年为期6个月的观测活动揭示了F区动力学的另外两种光学特征。6300埃的亮波快速穿过视场（FOV），这与午夜温度最高（MTM）压力隆起驱动的经向风有关。1995年5月3日，在地磁活动期间，一种6300埃的气辉损耗模式进入了阿雷西博的视场。这种效应代表了赤道扩展F不稳定性的光学特征，这些不稳定性从赤道上升到接近2500千米的高度，从而影响阿雷西博的L = 1.4通量管。
Pilot observations were conducted at Arecibo, Puerto Rico, using an all-sky, image-intensified CCD camera system in conjunction with radar, ionosonde, and Global Positioning System (GPS) diagnostic systems during the periods January 19–28, 1993, and February 21 to August 22, 1995. These represent the first use of campaign mode operations of an imager at Arecibo for extended periods of F region observations. The January 1993 period (the so-called “10-day run”) yielded a rich data set of gravity wave signatures, perhaps the first case of direct imaging of thermospheric wave train properties in the F region. The 6-month 1995 campaign revealed two additional optical signatures of F region dynamics. A brightness wave in 6300 A passing rapidly through the field of view (FOV) has been linked to meridional winds driven by the midnight temperature maximum (MTM) pressure bulge. On May 3, 1995, during a period of geomagnetic activity, a 6300-A airglow depletion pattern entered the Arecibo FOV. Such effects represent the optical signatures of equatorial spread F instabilities that rise above the equator to heights near 2500 km, thereby affecting Arecibo's L = 1.4 flux tube.