Line 6 goes from Day 70 1042z to day 72 1251z and includes a 180
degree turn.  The first part is on Exabyte tapes 43, 44, 45 and is
around 3GB.  During CDP sort, the data are decimated and truncated in
time so that they only contain data from 1 to 6 seconds.  Even so,
that's a lot of data, so it's broken into chunks that will fit on disk.
ls -l /archive/mcs/1997/nbp9702
-r--r--r--    1 henkart  aog      686691288 Jun  9 16:12 gathers.day70-1042z
-rwxr-xr-x    1 henkart  aog      535190508 Jun 11 18:18 gathers.day71-0300z
-rwxr-xr-x    1 henkart  32       980925264 Jun 16 10:25 gathers.day071-1531z



-rwxr-xr-x    1 henkart  aog      67283732 Jun 29 14:56 stack.day070-1044z
-rwxr-xr-x    1 henkart  aog      58044192 Jun 29 15:07 stack.day071-0300z
-r--r--r--    1 henkart  32       110195772 Jun 23 17:09 stack.day071-1530z
-r--r--r--    1 henkart  32       22904912 Jun 23 17:10 stack.day072-1000z



Combining files and renumbering looked like:

sioseis << eof
procs diskin diskoa end
diskin
   ntrgat 1 
   fno 977 lno 12020 ipath fdm.line6c.1 end
   fno 12021 lno 21956 ipath fdm.line6c end
   fno 1664 lno 3946 ipath fdm.line6d end
end
diskoa
   fon 1 opath /data/vol3/henkart/fdm.line6.1 end
end
end
eof