Comparison of Farside Observations of Solar Activity from STEREO's Extreme UltraViolet Imager and the Global Oscillations Network Group (GONG)

Details Comparison of Farside Observations of Solar Activity from STEREO's Extreme UltraViolet Imager and the Global Oscillations Network Group (GONG) Comparison of Farside Observations of Solar Activity from STEREO's Extreme UltraViolet Imager and the Global Oscillations Network Group (GONG)

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011spd....42.1802l&link_type=abstract

American Astronomical Society, SPD meeting #42, #18.02; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

Beginning February 18, 2011, the STEREO mission, for the first time, gave us a "whole Sun” view of the entire corona in extreme ultraviolet (EUV) light. At this time, the twin STEREO spacecraft were 180° apart and roughly ±90° from Earth. For the next several years, as the STEREO spacecraft drift further from Earth, EUV images from STEREO combined with the Earth-side images from the Solar Dynamics Observatory will continue to show the solar activity in the chromosphere and corona for the full Sun. Here, we compare these three-spacecraft EUV observations of farside solar activity with the prediction of far side active regions from helioseismology using NSO GONG observations (see http://stereo-ssc.nascom.nasa.gov/beacon/beacon_farside.shtml). We compare cases where (1) a known active region persists throughout its farside passage, and (2) where a new active region emerges on the farside and rotates around to the Earth-side. We also discuss tools developed to help further in-depth comparison of solar observations utilizing far-side data.

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