5
1.1.3
DOI, DOC, NASA, and NSF, in coordination with DHS and DOE, will improve on the induced
geo-electric field benchmarks for the continental United States.
Deliverable: Develop (Phase 2) improved induced geo-electric field benchmarks
Timeline: Within 2 years of the publication of this Action Plan
1.2
Develop Benchmarks for Ionizing Radiation
Changes in the near-Earth radiation environment can affect satellite operations, astronauts in space,
commercial space activities, and the radiation environment on aircraft at relevant latitudes or altitudes.
Understanding the diverse effects of increased radiation is challenging, but the ionizing radiation
benchmarks will help address these effects.
The following areas should be considered in addressing the near-Earth radiation environment:
Earth’s trapped radiation belts, the galactic cosmic ray background, and solar energetic-particle events.
The radiation benchmarks should account for any change in the near-Earth radiation environment,
which, under extreme cases, could present a significant risk to critical infrastructure operations or
human health.
At a minimum, the ionizing radiation benchmarks and associated confidence levels will define at least the
radiation intensity as a function of time, particle type, and energy for the following event-occurrence rate
and intensity level:
•
An occurrence frequency of 1 in 100 years; and
•
An intensity level at the theoretical maximum for the event.
The benchmarks will address radiation levels at all applicable altitudes and latitudes in the near-Earth
environment, and all benchmarks will state the assumptions made and the associated uncertainties.
The following actions will be taken to develop ionizing radiation benchmarks:
1.2.1
NASA and DOC, in coordination with NSF, the Department of Transportation (DOT), the
Department of Defense (DOD), and the Federal Communications Commission (FCC), will:
(1) assess the feasibility and utility of establishing functional benchmarks for ionizing
radiation using the existing models and body of literature for this phenomenon; and (2) use
the existing body of work to produce benchmarks.
Deliverable: Develop Phase 1 benchmarks
Timeline: Within 180 days of the publication of this Action Plan
1.2.2
NASA and DOC, in coordination with NSF, DOT, DOD, and FCC, will assess the suitability of
current data sets and methods to develop a more-refined (compared to Phase 1) set of
benchmarks. The assessment will identify gaps in methods and available data, project the
cost of filling the gaps, and project the improvement to the benchmarks based on filling
each gap.
Deliverable: Complete assessment report
Timeline: Within 1 year of the publication of this Action Plan
1
The effects of space weather on technology can extend beyond the near-Earth environment, but this issue is considered
outside of the scope of this Action Plan.