The YOHKOH data archive is created on Unix computers at ISAS, Japan, using standard archiving tools from the Unix operating system. All archiving is done on 8mm Exabyte tapes. Nominally, each archive tape will contain one calendar week (always beginning with Sunday) of reformatted data and all the software used to access the data. Tapes are created as soon as a complete week of the data are assembled; but, because data are collected from two sources (KSC in Japan and NASA's DSN) some delay is expected. The tapes are then sent to California for duplication and distribution to the U.S. Co-I's. At ISAS the archive tapes are copied to MO disk.
Archive tapes can be read on Unix and VMS machines such as SUN, SGI, and Digital using software package written in Interactive Data Language (IDL).
For more information on reading archive tapes see the GO_RDTAP description in the User's Guide.