/data/imp/imp8/mag/15s_ascii/00readme.txt 

NSSDC Data Set ID: SPHE-00861
Old NSSDC ID: 73-078A-01O

This directory consists of annual subdirectories containing
daily files of 15.36-sec magnetic field data.  Each such
annual subdirectory also contains a subdirectory of daily
attribute files.

An ASCII data set was created by NSSDC in the early 1990's,
in consultation with the GSFC IMP magnetometer team, by
selecting only the most frequently used words from the 68-word
records of the PI-provided binary data set.  It was recreated in
2002 to: replace 2-character year fields with 4-character fields;
replace "SQRT(variance)" values with "variance" values; fix
certain pre-data-gap spacecraft position errors; fix end-of-day
record dropping problems of NSSDC's initial dataset creation
software. The recreated data set replaced the initial version 
in this ftp area in early 2003.

Note that an FTPHelper interface to this dataset, providing data
subsetting and and graphical browsing, is available at
"https://omniweb.sci.gsfc.nasa.gov/ftpbrowser/"

In mid-2003, NSSDC created an hourly-averaged version
of this 15-s data set; it is available from
ftp://nssdcftp.gsfc.nasa.gov/spacecraft_data/imp/imp8/mag/1hr_ascii/
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 Related data and directories:
SPDF Data and Orbits Services <http://spdf.gsfc.nasa.gov/>
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SPDF Contact: Natalia Papitashvili <Natalia.E.Papitashvili@nasa.gov>,
 
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
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