HR: 0830h
AN: SP11B-14    [Abstracts]
TI: The GONG Farside Project
AU: * Leibacher, J W
EM: JLeibacher@spd.aas.org
AF: National Solar Observatory / GONG, POB 26732, Tucson, AZ 85726 United States
AU: Braun, D
EM: dbraun@spd.aas.org
AF: Northwest Research Associates, 3380 Mitchell Lane, Boulder, CO 80301 United States
AU: González Hernández, I
EM: irenegh@nso.edu
AF: National Solar Observatory / GONG, POB 26732, Tucson, AZ 85726 United States
AU: Goodrich, J
EM: jgoodrich@nso.edu
AF: National Solar Observatory / GONG, POB 26732, Tucson, AZ 85726 United States
AU: Kholikov, S
EM: skholikov@nso.edu
AF: National Solar Observatory / GONG, POB 26732, Tucson, AZ 85726 United States
AU: Lindsey, C
EM: CLindsey@spd.aas.org
AF: Northwest Research Associates, 3380 Mitchell Lane, Boulder, CO 80301 United States
AU: Malanushenko, A
EM: annam@noao.edu
AF: Saint Petersburg State University, Stary Peterhof, St Petersburg, Russian Federation
AU: Scherrer, P
EM: PScherrer@spd.aas.org
AF: Stanford University, HEPL 4085, Stanford, CA United States
AB: The GONG program is currently providing near-real-time helioseismic images of the farside of the Sun. The continuous stream of low resolution images, obtained from the 6 earth based GONG stations, are merged into a single data series that are the input to the farside pipeline. In order to validate the farside images, it is crucial to compare the results obtained from different instruments. We show comparisons between the farside images provided by the MDI instrument and the GONG ones. New aditions to the pipeline will allow us to create full-hemisphere farside images, examples of the latest are shown in this poster. Our efforts are now concentrated in calibrating the farside signal so it became a reliable solar activity forecasting tool. We are also testing single-skip acoustic power holography at 5-7 mHz as a prospective means of reinforcing the signatures of active regions crossing the the east and west limb and monitoring acoustic emission in the neighborhoods of Sun's the poles. This work utilizes data obtained by the Global Oscillation Network Group (GONG) Program, 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 Astrofisico de Canarias, and Cerro Tololo Interamerican Observatory, as well as the Michaelson Doppler Imager on SoHO, a mission of international cooperation between ESA and NASA. This work has been supported by the NASA Living with a Star - Targeted Research and Technology program.
UR: http://gong.nso.edu/data/farside
DE: 7522 Helioseismology
SC: Solar Physics Division - AAS [SP]
MN: 2005 Joint Assembly