EUVI Synchronic Maps
The EUVI synchronic maps are heliographic projections of the Extreme Ultraviolet (EUV) solar corona recorded by the Extreme UltraViolet Imager (EUVI) telescope on the two STEREO spacecraft. Images acquired simultaneously (hence, synchronic maps) from the two EUVIs are projected onto a latitude vs. Carrington longitude grid to reveal the instantaneous coverage of the solar atmosphere provide by the STEREO imagers. Each frame shows the actual EUVI-A and B images and the location of the spacecraft in the inner heliosphere at the bottom of the map. We produce maps in three EUV wavelengths representing different 'nominal' temperatures of the coronal plasma: ~80,000 Kelvin (304 Å), 1.4 million K (195Å), 1.8 million K (284 Å). The movies below have at a 6-hour cadence and span from the beginning of the STEREO mission in 2007 to September 27, 2014.
We also provide synchronic maps from the combination of EUVI and the Atmospheric Imaging Assembly (AIA) EUV images on the Solar Dynamics Observatory (SDO) mission. SDO/AIA records the solar corona from the Sun-Earth line thus increasing the simultaneous coverage of the solar corona when the STEREO spacecraft were at the far-side of the Sun (after about 2013) and especially after the interruption of the STEREO-B communications (since 10/2014). The map format is the same as for the EUVI-only maps. Note that AIA observes in 193Å. The movies below have at a 6-hour cadence and span from the August 15, 2010 to January 2016. They will be updated to the present soon.
For questions and updates please contact: Solar-Researchnull@jhuapl.edu.