The global solar magnetic field according to GONG during WHI

Details The global solar magnetic field according to GONG during WHI The global solar magnetic field according to GONG during WHI

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsh53a..03p&link_type=abstract

American Geophysical Union, Spring Meeting 2008, abstract #SH53A-03

Physics

7509 Corona, 7511 Coronal Holes, 7524 Magnetic Fields, 7529 Photosphere

Scientific paper

Line-of-sight photospheric magnetograms are produced every minute at GONG's six sites. Based on these low- noise images, near-real-time synoptic full-surface magnetograms are produced hourly around the clock. In the usual way, potential-field models for the global coronal field are then extrapolated from the photospheric maps hourly, giving a description of large-scale magnetic structure including field changes caused by quasi-static evolution and by flares and coronal mass ejections. This study focuses on the large-scale features of the corona during WHI that have consequences for the heliosphere and space weather: coronal holes, the streamer belt, magnetic flux open to the ecliptic plane and large-scale changes in the field topology. GONG is the official provider of magnetograms for NASA's STEREO mission.

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