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Seismic Holography of Solar ActivityThe basic goal of the project was to extend holographic seismic imaging techniques developed under a previous NASA contract, and to incorporate phase diagnostics. Phase-sensitive imaging gives us a powerful probe of local thermal and Doppler perturbations in active region subphotospheres, allowing us to map thermal structure and flows associated with "acoustic moats" and "acoustic glories". These remarkable features were discovered during our work, by applying simple acoustic power holography to active regions. Included in the original project statement was an effort to obtain the first seismic images of active regions on the Sun's far surface.
Document ID
20000094026
Acquisition Source
Goddard Space Flight Center
Document Type
Contractor or Grantee Report
Authors
Lindsey, Charles
(Solar Physics Research Corp. Tucson, AZ United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 2000
Subject Category
Geophysics
Funding Number(s)
CONTRACT_GRANT: NAG5-7236
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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