https://spdf.gsfc.nasa.gov/pub/data/imp/imp8/plasma_mit/solarwind_min/
00readme.txt

This directory formerly hosted 1-min solar wind data
from the MIT Faraday Cup on IMP 8.  These data
have been replaced by a new version of the data from
MIT that includes both solar wind and magnetosheath
data.  The path for these new data is

https://spdf.gsfc.nasa.gov/pub/data/imp/imp8/plasma_mit/sw_msheath_min/

The superseded data are still available, as of now, from
https://spdf.gsfc.nasa.gov/pub/data/imp/imp8/plasma_mit/solarwind_min_old/
An FTPBrpwser interface for the new data is available at
https://omniweb.gsfc.nasa.gov/ftpbrowser/imp_mit_min.html
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