File: ULYMAGHR_FMT.txt Version: NSSDC 04/03/2006 JFC
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ULYSSES HOURLY AVERAGED INTERPLANETARY CRUISE MAGNETIC FIELD DATA
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Data Set Coverage (yyy-mm-dd): 1990-10-25 to 1992-02-02
1992-02-16 to 2005-12-31
{excluding Jupiter encounter, Feb. 3 - 15,
1992}
Satellite: Ulysses
Experiment: Ulysses Magnetic Field
Principal Investigator: Dr. A. Balogh, Imperial College, London, UK
Data Set Contact: C. Tranquille, Ulysses Data System, SSD-ESA, ESTEC
Data Set Submission Date: 1998-07-06 (most recent update)
Data Set Description:
This data set contains hourly averages of the interplanetary magnetic
field measured by the Ulysses Magnetic Field experiment. Field vector
components are given in units of nanoteslas and in RTN coordinates,
where R is the sun-s/c axis, T is the cross product of the solar rotation
axis and R, and T is the cross product of R and T. The field magnitudes
in nT are averages of scalar magnitudes at higher time resolution. Times
are computed at the mid-point of each hour interval and expressed in
Spacecraft Event Time - UT (SCET-UT). For statistical checks the number
of full resolution vectors contributing to the average in each interval
is provided. Data gaps have not been flagged in any way - if there were
no available data in a particular hour then there is no data record for
that hour. No data from the Feb. 1992 encounter with Jupiter are included.
Further details on the magnetic field measurements can be found in the
following reference: Balogh, A., et al., Astron. Astrophys. Suppl. Ser.,
92(2), 221, 1992. This data set is available on-line here in the NSSDC
Anonymous FTP directory and in the COHOWeb browse/display system on the
World Wide Web.
Data Set Files:
ULYMAGHR_FMT.txt - this file
ULYMAGHR_yyyy.asc - yearly hour average data file for year "yy"
(ASCII)
Parameter Format for ULYMAGHR_yyyy.asc:
This file has ASCII table format with eight columns:
1) Year (two digit integer)
2) Decimal day no. (January 1 = Day 1, fractional part completely
specifies the timing of the data point)
3) Decimal hour (actually redundant but aids readability of the file)
4) Magnetic field hour average of R component (nT)
5) Magnetic field hour average of T component (nT)
6) Magnetic field hour average of N component (nT)
7) Magnetic field hour average magnitude (nT) (note that this is the
average of the magnitudes of the individual full resolution vectors
as opposed to the magnitude of the vector formed by the hourly
averaged components)
8) Number of full resolution vectors that have contributed to the
average (as a crude statistical validity check)
NSSDC Data Set ID: 90-090B-08A
Acknowledgement:
Please acknowledge the National Space Science Data Center and the
Principal Investigator, A. Balogh of Imperial College, London, UK.