Teleconference: Artificial Data

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Teleconference Artificial Data

• Nagi N. Mansour
• Sasha Kosovichev
• Objective
• Provide acoustic signature data to test/calibrate
  inversion methods
• Approach
• Generate acoustic surface signatures using Large
  Eddy Simulations

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LES Simulations

• Geometry
• Box (periodic in horizontal directions)
• Sphere
• Codes
• Stein Nordlund (Box)
• ASH (Sphere)

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Status

• Box code (Stein Georgobiani)
• Porting Stein Nordlund MHD code to SGI
• New postdoc (1/05)
• ASH (Miesch Toomre)
• SGS model implementation

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Expected results

• Box simulations
• Compressible code Acoustic signature
• ASH
• Anelastic approx. Derive acoustic field

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Full-sphere artificial data

• O(2) (next order) expansion will not work
• O(-1) is needed to express acoustic propagation

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Full-sphere artificial data
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Collaborators

• A. Wray (ARC)
• M. Rogers (ARC)
• Y-N Young (CTR)
• M. Miesch (NCAR/HAO)
• D. Georgobiani
• J. Toomre
• R. Stein