Note that in February, only the thin southern ``lip'' (arrow) of the GRS periphery is observable, with a little more in March (arrow). By April a narrow, but bright (clear) line has appeared and covered the northern periphery. By May, the northern clear region has structure and the southern lip is wider. By July, another thin, broken bright region has appeared around the inner periphery of the GRS. Between then and August, this bright periphery has grown wider - although it is not in a constant position. Numerous dark vortices with bright peripheries are apparent, passing the from west to east, relative to the GRS.
Similar observations of the Great Red Spot will continue and will focus on the behavior during the time period of early July, 1996, when Galileo's first orbital encounter takes place - for which the GRS is the primary target for synoptic measurement by all the remote sensing instruments. Observations such as these during that time period will help in the interpretation by providing a broader area of coverage than that which will be covered by the spacecraft observations.
This image is available in gif format via anonymous ftp to lono.jpl.nasa.gov (184.108.40.206) in pub/irtf as grs5ch95a.gif. It is catalogued as JPL color negative P-46229 BC.