RAPID: Study Ocean-Ionosphere-Thermosphere Connections Using Data from Transportable Dynasonde System Deployed in Marina, California

该合同将允许作为AFOSR/DURIP项目的一部分，继续运营部署在加利福尼亚州马里纳的可移动Dyasonde系统(TDS)。TDS在探测和测量电离层高度的波和公里尺度的不规则活动方面提供了独特的能力。该系统在加利福尼亚州马里纳的这次运行是独一无二的，因为在美国西海岸没有其他研究用的电离层探测仪，这是戴纳索德系统第一次能够在太平洋附近收集数据。该项目预计将获得强有力的证据，证明海洋在减缓热层高度的日常波浪活动方面发挥着非常重要的作用。该项目本质上是多学科的，本身就具有变革性。研究结果对大气建模、高频传播领域、次声应用、海洋观测规划和环境研究具有重要价值。该奖项将TDS在加利福尼亚州马里纳的业务延长至2022年12月至2023年5月底。延长的观测期将使研究海洋产生的~0.2赫兹次声(微气压)与电离层千米尺度不规则之间的长期相关性成为可能，目的是揭示这两种现象之间的因果关系。为了研究海洋和大气之间的重力波耦合，将使用Lomb-Scarger谱相关技术。波包检测技术和反向射线追踪也将被应用于在特定情况下确定波源的位置。研究人员将研究电离层波活动和对流层风之间的相关性，以区分海洋产生的大气重力波和山脉产生的大气重力波。将对TDS次声站获得的数据进行频谱分析，以揭示微压组件。这一裁决反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

This award will allow the continuation of operating a Transportable Dynasonde System (TDS) that was deployed in Marina, CA as part of an AFOSR/DURIP project. The TDS provides unique capabilities in detecting and measuring wave and km-scale irregularity activities at ionospheric altitudes. This operation of the system in Marina, CA is unique in that there are no other research ionosondes on the US west coast, and this is the first time a Dynasonde system is able to collect data near the Pacific Ocean. The project expects to obtain strong evidence of the very significant role the ocean plays in moderating day-to-day wave activity at thermospheric altitudes. The project is multi-discipline in nature and transformative by itself. The results can be of great value to atmospheric modeling, HF propagation field, infrasound applications, planning of ocean observations, and environmental research.This award extends the TDS operation in Marina, CA beyond December 2022 until the end of May 2023. The extended observational period will enable the study of long-term correlations between the ~0.2 Hz infrasound (microbaroms) generated by the ocean and km-scale irregularities in the ionosphere with the goal to reveal causal relationships between the two phenomena. To study the gravity wave coupling between the ocean and the atmosphere the Lomb-Scargle spectral correlation technique will be used. Wave packet detection techniques and reverse ray tracing will also be applied to resolve the positions of wave sources in select cases. The investigators will look into the correlation between the ionospheric wave activity and the tropospheric wind to distinguish ocean-generated atmospheric gravity waves from mountain-generated atmospheric gravity waves. Spectral analysis of the data obtained by the TDS’s infrasound station will be conducted to reveal the microbarom component.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.