This directory contains two subdirectories written by the NSSDC DIOnAS process. One consists of monthly files of 11-min particle count rate and pulse height data in ASCII from the U. Maryland electrostatic deflection spectrometer on IMP 8. The other consists of 3 files of hourly fluxes of 160-220 keV protons from the same instrument. The latter were prepared at U.Md. as the U.Md. contribution to the multi-instrument IMP 8 data sent to NOAA's Solar Geophysical Data Bulletins over many years. The content and format of each 11-min record are given at ftp://nssdcftp.gsfc.nasa.gov/miscellaneous/documents/b46766.txt The hourly data are written in ASCII inside DIOnAS-created tar files. Records contain time tags and fluxes of 160-220 keV protons. Brief descriptions of this data set and its source spacecraft and experiment are in the NSSDC information files at http://nssdc.gsfc.nasa.gov/database/MasterCatalog?ds=73-078A-03G (for 11-min data) and at http://nssdc.gsfc.nasa.gov/database/MasterCatalog?ds=73-078A-03D for hourly data. A more detailed description of the instrument and of the data processing is available in the PI-generated text included in the NSSDC Data Set Catalog at ftp://nssdcftp.gsfc.nasa.gov/staging/review_08/all_catalogs/dsc_0476.pdf ---------------------------------------------------------------- Related data and directories: SPDF Data and Orbits Services -------------- SPDF Contact: Natalia Papitashvili , Please acknowledge NASA's Space Physics Data Facility for data usage. Authorizing NASA Official: Dr. R.E. McGuire, Head, SPDF, NASA Goddard Space Flight Center 301-286-7794, e-mail: Robert.E.McGuire@nasa.gov -----------------------------------------------------------------------