Astronomy and Astrophysics – Astronomy
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...200.0403d&link_type=abstract
American Astronomical Society, 200th AAS Meeting, #04.03; Bulletin of the American Astronomical Society, Vol. 34, p.643
Astronomy and Astrophysics
Astronomy
Scientific paper
Having completed the upgrade of its observing equipment, the Global Oscillation Network Group (GONG) now acquires longitudinal component magnetograms every minute using a 1024 X 1024 square-pixel detector compared to the previous (Classic GONG) program of recording a (1-minute integrated) magnetogram once per hour using a 256 X 242 rectangular-pixel detector. To demonstrate the registration accuracy and the quality of these magnetograms, synoptic maps were created using magnetograms from GONG+, Kitt Peak Vacuum Telescope (KPVT), UCLA Astronomy Group - Mt. Wilson, and Solar Heliospheric Observatory/Michelson-Doppler Imager (SOHO/MDI) for a common Carrington rotation cycle. Comparisons between independent maps constructed from the GONG+ sites (Big Bear, Cerro Tololo, and Learmonth) are also shown to display the excellent geometric agreement between the sites. The Global Oscillation Network Group project is supported by the National Science Foundation and operates in collaboration with the Big Bear Solar Observatory, High Altitude Observatory, Learmonth Solar Observatory, Udaipur Solar Observatory, Instituto de Astrofisico de Canarias, and Cerro Tololo Interamerican Observatory.
Donaldson Hanna Kerri L.
Harvey Jack W.
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