CEDAR/TIMED: Joule-heating and Auroral Variability (JAVa) Campaign

CEDAR/TIMED：焦耳加热和极光变化 (JAVa) 活动

• 批准号: 9813864
• 负责人: Gary Bust
• 金额: $ 5万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-01-15 至 2000-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9813864&HistoricalAwards=false
• 关键词: CEDAR; TIMED; Joule; heating; Auroral

ATM9813864The investigators will build and deploy a set of critical instruments clustered around the Sondrestrom radar in Greenland. They will operate these instruments for a single extended campaign during the winter season in 1999. The instruments include three radio beacon receivers which will be built and deployed along with two existing receivers in Greenland to perform radio tomographic imaging of the E and F region ionosphere. During the experiment, simultaneous measurements of the E region neutral winds will be made by the incoherent scatter radar and a Fabry-Perot interferometer at Sondrestrom, Greenland. The local measurements will be put on a global context using computer models. Using this method, the investigators will measure the three dimensional spatial and temporal structure in the height-resolved Joule heating and determine the contribution of small scale variability in Joule heating and its impact on global atmospheric structure. The campaign will test and validate the instruments and show that high resolution Joule heating can be measured by this technique. The observations are important to CEDAR/TIMED science objectives. CEDAR, which stands for Coupling, Energetics, and Dynamics of Atmospheric Regions, is a global change program that combines theoretical modeling with ground-based measurements to study the upper atmosphere and ionosphere. TIMED, for Thermosphere, Ionosphere, Mesosphere Energetics and Dynamics, is a NASA satellite program to study similar regions of the atmosphere. The joint CEDAR/TIMED program aims to coordinate ground-based and space-based observations to achieve better understanding of physical processes in the lower thermosphere and ionosphere.

ATM 9813864研究人员将在格陵兰岛的Sondrestrom雷达周围建造和部署一套关键仪器。 他们将在1999年冬季使用这些仪器进行一次长期活动。 这些仪器包括三个无线电信标接收器，将与格陵兰现有的两个接收器一起沿着建造和部署，对E和F区域电离层进行无线电层析成像。 在实验期间，将在格陵兰Sondrestrom用非相干散射雷达和法布里-珀罗干涉仪同时测量E区中性风。 将使用计算机模型将当地测量结果置于全球范围内。 利用这种方法，研究人员将测量高度分辨焦耳加热的三维空间和时间结构，并确定焦耳加热中小尺度变化的贡献及其对全球大气结构的影响。该活动将测试和验证这些仪器，并表明可以通过这种技术测量高分辨率的焦耳热。 这些观测对CEDAR/TIMED的科学目标具有重要意义。CEDAR代表大气区域耦合、能量学和动力学，是一个全球变化计划，将理论建模与地面测量相结合来研究高层大气和电离层。 TIMED（Thermosphere，Ionosphere，Mesosphere Energetics and Dynamics）是美国国家航空航天局的一个卫星计划，用于研究类似的大气层区域。 CEDAR/TIMED联合方案旨在协调地面和空间观测，以更好地了解低热层和电离层的物理过程。