CEDAR: Solar Activity Variations in the Topside Ionosphere Using Defense Meteorological Satellite Program (DMSP)

CEDAR：使用国防气象卫星计划 (DMSP) 观测上部电离层的太阳活动变化

• 批准号: 0228427
• 负责人: Sarita Venkatraman
• 金额: $ 24.45万
• 依托单位: University of Texas at Dallas
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-12-15 至 2006-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0228427&HistoricalAwards=false
• 关键词: CEDAR; Solar; Activity; Variations; Topside

This project will utilize data taken from the Defense Meteorological Satellite Program (DMSP) during an entire solar cycle to expand our knowledge of the topside ionosphere. The topside ionosphere at low and middle latitudes is strongly influenced by the behavior of the low altitude F region. Changing solar flux can produce large variations in the F region ionization rate. In addition, it is well known that F region winds modulate the height and the density of the F peak. This can further affect the ion composition and temperatures in the topside ionosphere. These changes are functions of various parameters like latitude, longitude, season, time of day as well as solar activity. The objective of this project is to establish the observed relationships between F region dynamics and the topside composition and temperatures over a complete solar cycle as functions of the above-mentioned parameters. This work will be carried out using satellite data. The observed average solar cycle variations in the topside will also be compared with the F peak data reflected in the IRI model and in the community computational models like SAMI2.

该项目将利用国防气象卫星计划（DMSP）在整个太阳活动周期期间获取的数据，以扩大我们对顶侧电离层的了解。在低纬度和中纬度的顶侧电离层强烈地受低海拔F区的行为的影响。改变太阳通量可以在F区电离率产生很大的变化。此外，众所周知，F区风调制F峰的高度和密度。这会进一步影响顶侧电离层中的离子组成和温度。这些变化是各种参数的函数，如纬度，经度，季节，一天中的时间以及太阳活动。该项目的目标是确定F区动态与整个太阳活动周期的顶部成分和温度之间的观测关系，作为上述参数的函数。这项工作将利用卫星数据进行。观测到的顶侧平均太阳周期变化也将与IRI模型和SAMI 2等社区计算模型中反映的F峰值数据进行比较。