Helium 10830Å Spectroheliograms

Full-Disk Image (gif file, 600x640 pixels)

1991 1992 1993 1994 1995 1996 1997 1998
The image orientation is celestial north at the top and west to the right.
The files are named "heYYMMDD.hhmm.gif", where 'YYMMDD' is the date of observation and 'hhmm' is the UT time of observation.

Full-Disk Image (fits-fomar data)

1991 1992 1993 1994 1995 1996 1997 1998
The files are named "heYYMMDD.hhmm.fts", where 'YYMMDD' is the date of observation and 'hhmm' is the UT time of observation.