Joshua Semeter, Boston University · 2020-01-01 · DASC, 5579 LIT 1 1/03/01 Plasma Sheet...
Transcript of Joshua Semeter, Boston University · 2020-01-01 · DASC, 5579 LIT 1 1/03/01 Plasma Sheet...
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Solar wind à atmosphereà societyJoshua Semeter, Boston University
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The solar wind hammer: Global response
Tangential stress (Maxwell + viscous):
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F = µ∇ B CF
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F = j × B
Normal stress:
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Tangential stress (Maxwell + viscous):
€
F = µ∇ B CF
€
F = j × B
Normal stress:
The solar wind hammer: Hierarchical response
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Airglow and Aurora: A rich information bearing signal!
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Magnetospheric projections
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The signal is inherently tomographic
Vertical dimension: particle energeticsParallel dimension: acceleration region physics
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Tomographic analysis
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Tomographic analysis of 100-m scale aurora
A
From Dahlgren et al., 2013
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Optimal imager networksSquare Packing
Hexagonal Packing
Tomographic!
Even modest overlap provides enough differential information to extract average energy and net energy flux through auroraltomography [Hirsch et al., IEEE 2016]