Acknowledgments

This work utilizes data obtained by the Global Oscillation Network Group (GONG) project, managed by the National Solar Observatory, which is operated by AURA, Inc. under a cooperative agreement with the National Science Foundation. The data were acquired by instruments operated by the Big Bear Solar Observatory, High Altitude Observatory, Learmonth Solar Observatory, Udaipur Solar Observatory, Instituto de Astrofísico de Canarias, and Cerro Tololo Interamerican Observatory.

The ring diagram work is supported by grants to Stanford and the University of Colorado from NASA and NSF.

The farside imaging work is supported by grants to NWRA/CoRA and SPRC through NSF (Stellar Astronomy & Solar-Terrestrial programs) and NASA (LWS and Sun-Earth Connection).

This work was supported in part by the UK Particle Physics and Astronomy Research Council and the Theoretical Astrophysics Center, Denmark.

SOHO is a joint project of ESA and NASA.

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