Planning the Role of High-Power, High Frequency-Band Transmitters in Advancing Ionospheric/ Thermospheric Research Workshop; Gakona, Alaska; August 2013

这是为了组织一次讲习班，以评估高功率高频(高频)发射机未来在支持电离层和热层研究方面的潜在作用。它将特别关注阿拉斯加HAARP(高频活跃极光研究计划)设施。HAARP是一个由美国空军、美国海军、阿拉斯加大学和国防高级研究计划局(DARPA)联合资助的电离层研究计划。位于阿拉斯加州加科纳的HAARP站的关键仪器是一个工作在高频波段的高功率射频发射机，用于临时激励有限区域的电离层。从历史上看，运行HAARP等设施的“加热器”社区与研究电离层和热层的研究社区有些不同。电离层和热层是近地空间环境的重要组成部分，低地轨道卫星在这里运行，通信和导航信号通过这些环境传输。然而，电离层-热层(IT)系统受到来自太阳的几种地球物理作用力的影响。太阳风和地球磁层之间的相互作用导致一部分太阳风能和等离子体被传输到磁层，然后传输到电离层和热层，产生极光和其他地磁现象。太阳高能粒子穿透高层和中层大气层，产生显著的电离和化学效应。太阳紫外线和极端紫外线辐射是热层和电离层中加热、电离和光化学反应的主要能源。研讨会将为这些社区提供一个有用的场所，让他们会面并评估HAARP在未来信息技术研究中的效用和成本/收益。具体地说，研讨会将对HAARP设施的未来产生重大影响，因为空军已经宣布打算放弃对该设施的历史承诺，HAARP用户将目光投向其他支持来源，包括NSF。如果没有这些额外的资金来源，该设施将被关闭，并根据可追溯到1970年代的协议填海造地，当时该设施是一个军事雷达站。

This is to organize a workshop to assess potential future roles of high-power HF (high frequency)-band transmitters in support of ionospheric and thermospheric research. It will focus, in particular, on the Alaskan HAARP (High Frequency Active Auroral Research Program) facility. HAARP is an ionospheric research program jointly funded by the U.S. Air Force, the U.S. Navy, the University of Alaska, and the Defense Advanced Research Projects Agency (DARPA). The key instrument at the HAARP station in Gakona, Alaska is a high-power radio frequency transmitter operating in the HF band, which is used to temporarily excite a limited area of the ionosphere. Historically, the "heater" communities that operate facilities like HAARP have been somewhat distinct from the research communities that study the ionosphere and thermosphere. The ionosphere and thermosphere constitute an important part of the near-Earth space environment where low-Earth orbiting satellites operate and through which communication and navigation signals are being transmitted. The ionosphere-thermosphere (IT) system is, however, subject to several geophysical forcings originating from the Sun. The interaction between the solar wind and the Earth's magnetosphere results in a fraction of the solar wind energy and plasma being transmitted into the magnetosphere, and subsequently into the ionosphere and thermosphere to produce auroras and other geomagnetic phenomena. Solar energetic particles penetrate into the upper and middle atmosphere to cause significant ionization and chemical effects. Solar ultraviolet and extreme ultraviolet radiation is the main source of energy for heating, ionization, and photochemical reactions in the thermosphere and ionosphere. The workshop will provide a useful venue for these communities to meet and to assess the utility and cost/benefits of HAARP in future IT research. Specifically, the workshop will have a major impact on the future of the HAARP facility as the Air Force has announced its intent to step back from its historical commitment to the facility and HAARP users look towards other sources of support, including the NSF. Absent these additional sources of funding, the facility would be closed and the land reclaimed in accordance with agreements dating back to the 1970s when the facility was an military radar site.