Auroral Kilometric Radiation, Substorms, and Related Phenomena: Satellite Conjunction and Conjugate Studies at South Pole

极光千米辐射、亚暴和相关现象：南极的卫星结合和共轭研究

• 批准号: 1911335
• 负责人: James LaBelle
• 金额: $ 12.5万
• 依托单位: Dartmouth College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-07-15 至 2023-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1911335&HistoricalAwards=false
• 关键词: Auroral; Kilometric; Radiation; Substorms; Related

The near-Earth environment (Geospace) is mostly organized by the Earth's magnetic field, which interacts with the solar wind (charged particles, plasma, flowing with a great speed from the Sun) and interplanetary magnetic field (extended Sun's magnetic field). Geospace is populated by plasma that mostly originates from the solar wind. Interaction of these two major players - geomagnetic field and solar wind plasma produces many electromagnetic phenomena such as beautiful ionospheric aurorae (Northern and Southern lights), natural electromagnetic radiation, field-aligned and ionospheric currents, that prominently appear and are observed in the polar areas where they are most intense. Studying these phenomena is a matter of high importance since they affect both satellite instrumentation and their communication with the ground centers. The number of satellites flying Geospace continues to grow every year.This award will study and establish the relationship between Auroral Kilometric Radiation (AKR) observed by distant satellites and ground-level AKR-like signals, as well as will test current theories on how these phenomena are connected. The methodology is to operate radio receivers at South Pole during anticipated conjunctions with the Cluster satellite high-resolution wave instrument and enabling simultaneous measurements of AKR fine structure at both locations. Further observations of coincident AKR on the Japanese Geotail and Canadian ePOP satellites and at South Pole will complement these measurements. All this research can only be done from Antarctica - because AKR-like signals cannot be regularly observed in the Northern hemisphere due to man-made radio frequency interference, as well as because conjugate satellite/ground-based observations at auroral latitudes require Antarctic measurements.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.

近地环境（地球空间）主要由地球磁场组成，地球磁场与太阳风（带电粒子、等离子体，以极快的速度从太阳流出）和行星际磁场（扩展的太阳磁场）相互作用。地球空间充满了主要来自太阳风的等离子体。地磁场和太阳风等离子体这两个主要因素的相互作用产生了许多电磁现象，例如美丽的电离层极光（北极光和南极光）、自然电磁辐射、场对准和电离层电流，这些现象在它们最强烈的极地地区显着出现和观察到。研究这些现象非常重要，因为它们影响卫星仪器及其与地面中心的通信。在地球空间飞行的卫星数量每年都在持续增长。该奖项将研究和建立遥远卫星观测到的极光千米辐射 (AKR) 与地面类 AKR 信号之间的关系，并将测试有关这些现象如何相互关联的当前理论。该方法是在预期与 Cluster 卫星高分辨率波仪器结合期间操作南极的无线电接收器，并能够同时测量两个地点的 AKR 精细结构。日本 Geotail 和加拿大 ePOP 卫星以及南极点对重合 AKR 的进一步观测将补充这些测量结果。所有这些研究只能在南极洲进行——因为由于人为射频干扰，在北半球无法定期观测到类似 AKR 的信号，而且极光纬度的卫星/地面共轭观测需要南极测量。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的评估进行评估，认为值得支持。 影响审查标准。

项目成果

Flickering Low Frequency Auroral Hiss

闪烁的低频极光嘶嘶声

• DOI: 10.1029/2020ja029098
• 发表时间: 2021
• 期刊: Journal of Geophysical Research: Space Physics
• 作者: LaBelle, James

South Pole Station Ground‐Based and Cluster Satellite Measurements of Leaked and Escaping Auroral Kilometric Radiation

南极站地面和集群卫星对泄漏和逃逸极光千米辐射的测量

• DOI: 10.1029/2021ja029399
• 发表时间: 2022
• 期刊: Journal of Geophysical Research: Space Physics
• 作者: LaBelle, James;Yearby, Keith;Pickett, Jolene S.
• 通讯作者: Pickett, Jolene S.