D- and E-Region Incoherent-Scatter Radar Observations at Sondrestrom, Greenland

格陵兰岛的Sondrestrom非相干散射雷达最近 升级了新的雷达数据采集系统， 以比以往更高的空间分辨率进行测量 以前 这里提出的努力将利用 改进研究两个有趣的和重要的问题， 电离层物理学 第一个是出现了一层薄薄的 110公里附近的金属离子。 这些层已经被 在低纬度地区观察到，并被解释为 由于中性剪切而引起的流星物质的集中 风 在高纬度地区，这种解释并不适用，因此， 这些层在Sondrestrom数据中的出现是 重大突破。 拟议研究的第二个主题是 在100公里以下的高度发生的增强电离， 高纬度地区发生的大磁暴。 这种电离是 产生的高能质子从太阳和它的存在， 低海拔会使无线电波传播产生巨大的变化 在高纬度地区。

The Sondrestrom incoherent scatter radar in Greenland has recently been upgraded with a new radar data acquisition system that allows measurements to be made with a higher spatial resolution than ever before. The effort proposed here will take advantage of the improvements to study two interesting and important problems in ionospheric physics. The first is the appearance of thin layers of metallic ions at altitudes near 110 km. These layers have been observed at lower latitudes and have been explained as the concentration of meteoric material due to shears in the neutral winds. At high latitudes this explanation does not apply, so that the appearance of these layers in the Sondrestrom data is an important breakthrough. The second topic of the proposed study is the enhanced ionization at altitudes below 100 km that occurs at high latitudes during large magnetic storms. This ionization is produced by energetic protons from the sun and its presence at such low altitudes can produce dramatic changes in radiowave propagation at high latitudes.