Collaborative Research: Meteor Plasma Formation and Dynamics with Implication for Radar Measurements

合作研究：流星等离子体的形成和动力学对雷达测量的影响

基本信息

批准号：
1755020
负责人：
Yakov Dimant
金额：
$ 38.28万
依托单位：
Trustees of Boston University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2018
资助国家：
美国
起止时间：
2018-09-01 至 2022-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1755020&HistoricalAwards=false
关键词：
Collaborative Research Meteor Plasma Formation

项目摘要

Earth's upper atmosphere is densely populated by molecular, atomic and ionized meteors. These particles are important for maintaining the conductivity of the E region ionosphere (~90-150 km). They can be sensed using radio and optical methods, and therefore provide a great deal of information about the state of the upper atmosphere and the extraterrestrial environments of their origin. However, current estimates of total meteoric input are accurate only to within approximately two orders of magnitude. It is important to improve upon such estimates, since meteor chemistry affects Earth from roughly 150 km above the surface all the way down to the ice cores. The research will apply radar data and first-principles computer models to trace the evolution of meteor plasma in the ionosphere. The project will support a full-time graduate student and an undergraduate. The Principal Investigators (PIs)' work will yield knowledge of the types of meteors that contribute most to Earth's upper atmosphere. This information is important to Space scientists, engineers, and astronomers. Spacecraft designers need to know the distribution of particle orbits and masses in order to mitigate potential hazards. Meteor population characteristics provides greater understanding of the evolution and composition of the outer solar system. The PIs and co-PI will continue their efforts to share their knowledge and enthusiasm about space and meteor science with the larger community through outreach to K-12 schools.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

地球的上层大气密集地被分子，原子和电离流星所繁殖。这些颗粒对于维持E区电离层的电导率很重要（〜90-150 km）。可以使用无线电和光学方法来感知它们，因此提供了有关其起源的上层气氛和外星环境的大量信息。但是，当前的总气象输入估计值仅在大约两个数量级以内。重要的是要改善此类估计值，因为流星化学将地球从表面上方大约150 km影响到冰芯影响。该研究将应用雷达数据和第一原理计算机模型来追踪电离层中流星血浆的演变。该项目将支持全职研究生和本科生。主要研究人员（PIS）的工作将使人们了解对地球上层大气层贡献最大的流星类型。这些信息对太空科学家，工程师和天文学家很重要。航天器设计人员需要了解粒子轨道和质量的分布，以减轻潜在的危害。流星人口特征提供了对外太阳系的演变和组成的更多了解。 PIS和Co-Pi将继续努力通过向K-12学校宣讲与更大的社区分享对太空和流星科学的知识和热情。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛影响的评估来通过评估来获得支持的。