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Suggested Citation:"Appendix A: Statement of Task." National Research Council. 2014. Opportunities for High-Power, High-Frequency Transmitters to Advance Ionospheric/Thermospheric Research: Report of a Workshop. Washington, DC: The National Academies Press. doi: 10.17226/18620.
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A

Statement of Task

An ad hoc committee will plan a 3-day public workshop on the role of high-power HF-band transmitters in upper atmospheric research. The topics for discussion at the workshop may include the following:

1.    What is the state of the art in active ionospheric and thermospheric research?

2.    What are the fundamental research areas in ionospheric science that can be addressed using high-power HF-band transmitters?

3.    What are the key diagnostic instruments needed in conjunction with high-power HF-band transmitters to address items 1 and 2?

4.    Are there emerging science questions that might benefit from active ionospheric experiments in the subauroral zone?

5.    What operating parameters (e.g., power and transmission frequency) are needed to address the questions in items 1-4?

6.    Are there ways to combine similar facilities (e.g., EISCAT, Arecibo) to perform global ionospheric science?

7.    What research opportunities might arise from the relocation of the AMISR incoherent scatter radar from the Poker Flat Research Facility in Poker Flat, AK, to Gakona, AK, the location of the HAARP facility?

The committee will hold organizing sessions by teleconference to develop the agenda for the workshop and to define the specific topics for invited presentations and discussions. The committee will subsequently select and invite speakers and other participants and moderate the discussions at the event. The committee will prepare a workshop report that will summarize what transpired at the event but will not contain any findings, conclusions or recommendations.

Suggested Citation:"Appendix A: Statement of Task." National Research Council. 2014. Opportunities for High-Power, High-Frequency Transmitters to Advance Ionospheric/Thermospheric Research: Report of a Workshop. Washington, DC: The National Academies Press. doi: 10.17226/18620.
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Opportunities for High-Power, High-Frequency Transmitters to Advance Ionospheric/Thermospheric Research is the summary of a workshop convened by the Space Studies Board of the National Research Council in May 2013. The request for this workshop was informed by the sponsors' awareness of the possibility that tight budgets would result in the Department of Defense's curtailment or even termination1 of support for the High Frequency Active Auroral Research Program (HAARP), which includes the world's highest-power and most capable high-frequency transmitter - "heater" - for ionospheric research. Although the workshop was organized to consider the utility of heaters in upper atmospheric research in general, it had a specific focus on the HAARP transmitter facility, which is located in a remote part of southeastern Alaska.

Research conducted by the ionospheric modifications community - a community that uses high-frequency transmitters to inject energy in the ionosphere and measure its effects using ground and space-based diagnostics - is focused on understanding the interaction of radio waves with the ionospheric plasma, the local consequences of heating in the ionosphere, and studies of non-linear plasma physics processes. The workshop provided a forum for information exchange between the comparatively small group of scientists engaged in programs of upper atmospheric research using high-power high-frequency radar transmitters and the larger ionospherethermosphere-magnetosphere research community.

This report examines the state of the art in active ionospheric and thermospheric research; considers the fundamental research areas in ionospheric science that can be addressed using high-power high-frequency-band transmitters; discusses emerging science questions that might benefit from active ionospheric experiments in the sub-auroral zone; and considers ways to combine similar facilities to perform global ionospheric science. The report also examines research opportunities that might arise from the relocation of the AMISR incoherent scatter radar from the Poker Flat Research Facility in Poker Flat, AK to Gakona, AK, the location of the HAARP facility.

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