ICE Magnetometer (MAG) data at AMDA
Source: PDS: Small Bodies
Principal Investigator(s): E.J.Smith; data provided by J. Wolf
The vector helium magnetometer is mounted on the
end of a 3 m boom and makes in-situ measurements of
the ambient magnetic field vector in the frequency
range 0-3 Hz. The instrument automatically chooses
one of eight ranges in which to operate, the four
lowest full-scale ranges being +/-4, +/- 14, +/-42,
and +/- 146 nT. The precision of measurement is
1/256 of the full-scale field values (0.016, 0.055
nT, etc.). The absolute accuracy is limited by
knowledge of the spacecraft magnetic field, which
is presently known to better than 0.1 nT. The time
resolution corresponds to three triaxial samples
per second at 1024 bit/s . The magnetometer
contains a three- channel spectrum analyzer which
is connected to the search-coil sensor of the
plasma- wave investigation."
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The comet centered coordinate (CSE) system used
in these measurements is a right handed coordinate system.
It is defined
so that the coordinate system has its origin at the comet's nucleus, with
the XSE-axis from the nucleus to the sun, the YSE-axis parallel to the
ecliptic plane in the direction of retrograde planetary motion.
The ZSE- axis completes the coordinate system such that at the time of 's
passage through the ecliptic plane it points to the ecliptic north.