This is included for completeness in the data report, and may have relevance to anyone who needs to go back to the original, unprocessed (raw) S-PolKa data. Others may successfully ignore this note.
Original S-Pol data were written in near realtime to SuperDLT-IV tape in a format named "S-Pol Archive Format", with individual scan volumes written as a single tar archive on a single tape file. Original tapes were inventoried, and data transferred to the NCAR Mass-Store under a non-public directory. Included here are the tapelist and the MSS daily listings for all of the archive files.
There is also a very long comprehensive listing.