Rather than having a standard MAST search interface for retrieving
EPOCh data, users can navigate two different directory structures
to find data of interest. Clicking on the subdirectory headings will
display a page of either more subdirectories or downloadable files.
The first directory structure was provided
by the EPOCh project for use with the Planetary Data System (PDS).
The second is a MAST-formatted structure which divides files by visit rather than
day of observation. Links are also provided for downloading all the data
associated with a particular visit as a tar file.
Although the directory structures are different, the underlying files
are the same.