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Radiation and Plasma Effects

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Radiation and Plasma Effects Teams' Scope of Work

This diagram shows schematically the Radiation and Plasma Effects Working Teams' scope of work, which includes impacts on satellites and radiation impacts on aviation. The corresponding source populations that are responsible for the effects are also shown.

Summary of Relevant Physical Quantities

  1. Fix Orbits: polar LEO, MEO, GEO, GTO, polar aircraft route.
  2. Derive effects metrics based on standard orbits/components.

Below is what we have achieved so far. For each types of impacts, both ‘Effects Metric’ and ‘Science quantity metric’ have been chosen.

Effect Metric Science Predictions Timescales
(Space Weather)
Surface Charging >10 keV e- flux  >10 keV e- flux; Te; Ne  seconds
 Internal Charging  >100 fA/cm2 [100 mils]  1 MeV and >2 MeV e- flux  24-hour, 48hr, 72hr averaged
 SEEs  SEE rate [100 mils]  >30 MeV p+ flux; >15 LET flux  5-min, daily, weekly
 Total Dose  Dose in Si [100 mils; 4 mils]  30-50 MeV p+ flux;
>1.5 MeV e- flux
1-10 MeV p+
 Daily, weekly, mission duration
 Aviation  Dose rate in aircraft (D-index)  2 spectral parameters
(power law with rigidity)
 5-min, hourly, whole flight

This diagram summarizes the goal of such model validation effort and puts its importance in a global context in terms of bridging different communities (users in the diagram bears a more general meaning) together. Such effort is indispensable in the research to operations and operations to research arena.

National Aeronautics and Space Administration Air Force Materiel Command Air Force Office of Scientific Research Air Force Research Laboratory Air Force Weather Agency NOAA Space Environment Center National Science Foundation Office of Naval Research

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