Inferring E Region Electron Density Profiles at Jicamarca from Faraday Rotation of Coherent Scatter

从相干散射的法拉第旋转推断 Jicamarca 的 E 区电子密度分布

• 批准号: 0226235
• 负责人: David Hysell
• 金额: $ 21.52万
• 依托单位: Cornell University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-01-15 至 2006-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0226235&HistoricalAwards=false
• 关键词: Inferring; Region; Electron; Density; Profiles

This is a project to implement and exploit a novel means of measuring plasma density profiles in the ionosphere using low-power, ground-based radar. The technique utilizes the Faraday rotation of radar signals coherently scattered by plasma irregularities. Measurements are made with a bistatic radar system located in this case at the Jicamarca Radio Observatory and at a remote site in Paracas, Peru. The Faraday rotation technique was demonstrated recently by the PI of this project, who was supported by a CEDAR grant for one year to investigate its feasibility. The objective of the current project is to measure electron density profiles in the equatorial E region in the latitude sector where the electrojet flows. Such profiles cannot be measured with the Jicamarca incoherent scatter radar because, paradoxically, of clutter generated by small-scale irregularities in the electrojet. Density profiles in the equatorial E region have been measured on a few occasions with sounding rockets but never before by remote sensing. Consequently, there is a poorly developed picture of the structure of the equatorial E region, particularly at night, and several experimental, theoretical, and modeling efforts in low latitude ionospheric physics are suffering as a result.

这是一个利用低功率地面雷达测量电离层等离子体密度剖面的新方法的项目。该技术利用了由等离子体不规则性相干散射的雷达信号的法拉第旋转。测量是用位于Jicamarca射电天文台和秘鲁Paracas偏远地点的双基地雷达系统进行的。该项目的PI最近演示了法拉第旋转技术，该项目由CEDAR拨款支持一年，以调查其可行性。当前项目的目标是测量电喷流所在纬度区域赤道E区域的电子密度分布。这种剖面不能用Jicamarca非相干散射雷达测量，因为电喷流中的小尺度不规则会产生杂波，这是自相矛盾的。赤道E区域的密度剖面已经用探空火箭测量过几次，但以前从未用遥感测量过。因此，对于赤道E区，特别是夜间的结构，我们的认识并不完善，而在低纬度电离层物理学方面的一些实验、理论和建模工作也因此受到影响。