SuperMAG: High Time-resolution Data Enabling Global UltraLow Frequency (ULF) Studies

SuperMAG：高时间分辨率数据支持全球超低频 (ULF) 研究

• 批准号: 1743030
• 负责人: Jesper Gjerloev
• 金额: $ 45.38万
• 依托单位: Johns Hopkins 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 2021-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1743030&HistoricalAwards=false
• 关键词: SuperMAG; Time; resolution; Data; Enabling

This research will develop and provide a new SuperMAG project capability for organizing, storing, and disseminating high time resolution data from world-wide arrays of fluxgate and induction coil magnetometer for magnetospheric ultralow frequency (ULF) waves and substorm-related investigations. SuperMAG is a worldwide collaboration of organizations and national agencies that currently operate 300 ground-based magnetometers. This research effort will gather and organize high-time resolution data, write software packages to pre-process and process high time resolution fluxgate and induction coil magnetometers data, and disseminate them to the community on the SuperMAG website. The resulting data product will enable studies of global ULF activity by allowing easy access to high time resolution measurement (5sec), derived data products, plots and other tools. Availability of the new data product will provide new opportunities of research to students. The project will also foster education and public outreach activities, which are already a key component of SuperMAG.This research will enhance the current SuperMAG capabilities by expanding its ground-based magnetometer data holdings from 1-minute cadence to higher sampling rates ( 5 sec) of both fluxgate and induction coil arrays and by developing additional data products that will make observations of ULF waves and substorm-related variations in these high-cadence data more easily accessed and understood by the wider geospace science community. The high time-resolution magnetometer dataset will enhance studies of substorm-related processes because of the availability of data on Pi1b wave activity (higher frequency than Pi2, but also generated in association with nightside magnetic field dipolarizations), and studies of radiation belt enhancement and loss processes because of the availability of the full range of ULF waves, including in particular electromagnetic ion cyclotron (EMIC) waves generated in the middle and inner magnetosphere. The implementation of high time-resolution data, along with the new addition of satellite footpoints to SuperMAG, will foster collaborations between the satellite community and the ground community for new scientific areas such as ULF waves. The project will foster education and public outreach (EPO) activities, which are already a key component of SuperMAG.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.

这项研究将开发和提供一个新的SuperMAG项目能力，用于组织、存储和传播来自全世界磁通门和感应线圈磁力计阵列的高时间分辨率数据，用于磁层超低频波和与亚暴有关的调查。SuperMAG是一个全球性的组织和国家机构合作项目，目前运行着300个地面磁力计。这项研究工作将收集和组织高时间分辨率数据，编写软件包以预处理和处理高时间分辨率磁通门和感应线圈磁强计数据，并在SuperMAG网站上向社区传播。由此产生的数据产品将使全球超低频活动的研究，使人们能够方便地获得高时间分辨率的测量（5秒），派生的数据产品，绘图和其他工具。新数据产品的可用性将为学生提供新的研究机会。该项目还将促进教育和公共外联活动，这项研究将通过将其地面磁力计数据从1分钟的节奏扩展到磁通门和感应线圈阵列的更高采样率（5秒），并通过开发更多的数据产品来观测超低频波和亚暴，从而提高目前的SuperMAG能力。这些高节奏数据的相关变化更容易为广大地球空间科学界所获取和理解。高时间分辨率磁力仪数据集将加强对亚暴相关过程的研究，因为可获得Pi1b波活动数据（频率高于Pi2，但也与夜侧磁场双极化有关），以及由于全范围ULF波的可用性而对辐射带增强和损失过程的研究，特别包括在中间和内磁层中产生的电磁离子回旋（EMIC）波。沿着实施高时间分辨率数据以及SuperMAG新增的卫星足迹，将促进卫星界和地面界在超低频波等新科学领域的合作。该项目将促进教育和公众推广（EPO）活动，这已经是SuperMAG的一个关键组成部分。该奖项反映了NSF的法定使命，并已被认为是值得通过使用基金会的知识价值和更广泛的影响审查标准进行评估的支持。