Introduction
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AGU June 2000 -- Poster SYNOPTIC MAPS FROM THE LASCO AND EIT EXPERIMENTS ON SOHO NBR1 2 K. P. Dere1 RAH1 Summary Synoptic (or Carrington) Maps are an efficient method of presenting an overview of both short term and long term coronal evolution. Presented here are east and west limb maps from the C2 and C3 instruments of the Large Angle Spectrometric Coronagraph, and also meridian maps from the Extreme-ultraviolet Imaging Telescope on the SOHO spacecraft. Data is available for approximately 51 solar rotations spanning 4 years, from January 1996 to the present. Presented here is a subset of this data in Carrington format, giving an overview of the evolution of coronal structure in the rising phase of the solar cycle. The maps demonstrate the evolution of the corona from a relatively simple, two-sectored structure to an increasingly complex multisectored structure. Distortions and discontinuities in the streamer belt visible in the limb maps are associated with active regions on the sun, the shape of the current sheet, and coronal mass ejections. Meridian maps for EIT illustrate the corresponding structures and long-term changes in the lower atmosphere. PROCEDURE FOR MAKING LASCO CARRINGTON MAPS PROCEDURE FOR MAKING EIT CARRINGTON MAPS
ABOUT LASCO CARRINGTON MAPS... ABOUT EIT CARRINGTON MAPS...
USES OF SYNOPTIC MAPS All Carrington maps are made in FITS format. LASCO C2 east and west limb maps are available at radii of 2.5, 3.0, 4.5 and 5 Rsun. Carrington maps for LASCO C3 are in the process of being computed and are being made for Rsun=5, 7, 10, 15, 20, 25. Carrington maps for EIT are being made for wavelengths 171 Å, 195 Å, 284 Å and 304 Å. EIT limb maps are possible. To work with the FITS data, please contact one of the authors. Carrington maps for EIT and LASCO are also available for viewing in GIF or PS format at http://lasco-www.nrl.navy.mil/carr_maps .FEATURES IN SYNOPTIC MAPS Coronal Mass Ejections Streamer Structure Other Features Visible in Synoptic MapsEIT
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