https://spdf.gsfc.nasa.gov/pub/data/omni/high_res_omni/sc_specific/00readme.txt

This directory provides a path to spacecraft-specific ACE,
Wind, IMP 8 and Geotail data sets created as part of the effort to create 
the High Resolution OMNI data set.  For 1995 and later, 15-16 sec 
magnetic field were shifted by Minimum Variance and/or Crossed 
Product techniques from their observation points to the bow shock 
nose.  For 1998-2000, 16 sec ACE magnetic field were shifted by 
each of four shift techniques from their observation points to the 
location of the Wind spacecraft.  Plasma parameters are also shifted
in both cases.  These data and the format are extensively 
discussed at http://omniweb.gsfc.nasa.gov/html/HROdocum.html.

These data are also available with graphical display and 
time- and parameter-subsetting for any one spacecraft or 
for any combination of spacecraft at
http://omniweb.gsfc.nasa.gov/form/sc_merge_min1.html


This directory provides annual files of the 1-min data, plus subdirectoies 
for monthly files of the 1-min data and annual files of 5-min data created
from the 1-min data.  
The file names have the form

scname_min_xxyyyy.txt for 1-min data and
scname_5min_byyyy.txt for 5-min data,
where
scname = ace, imp, wind or geotail

xx = b, 2w, 3w, 4w, 5w, w
xx = b: 1-min or 5-min data shifted to bow shock nose (by technique 4)
xx = 2w (ACE shifted to Wind by technique 2 - MVAB-0)
xx = 3w (ACE shifted to Wind by technique 3 - cross products) 
xx = 4w (ACE shifted to Wind by technique 4 - combination of 2 and 3)
xx = 5w (ACE shifted to Wind by technique 5 - another combo of 2 and 3)
xx = w  (unshifted Wind data)
yyyy = year 

The monthly files of 1-min data use the same naming convention, 
with yyyy replaced by yyyymm.

This directory also contains a file (format.txt) detailing the common 
format of all the spacecraft-specific data sets.
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Related data and directories:
SPDF Data and Orbits Services <http://spdf.gsfc.nasa.gov/>

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  Acknowledgement:

 Use of these data in publications should be accompanied by
 acknowledgements of the Space Physics Data Facility(SPDF) 
              
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SPDF Contact: Natalia Papitashvili <Natalia.E.Papitashvili@nasa.gov>
 
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Authorizing NASA Official: Dr. R.E. McGuire, Head, SPDF, NASA Goddard Space Flight Center
                        301-286-7794, e-mail:  Robert.E.McGuire@nasa.gov