A three-axis fluxgate magnetometer can measure the asteroid's magnetic
field from DC to 10 Hz. The sensor head is mounted on the high gain
antenna feed, while the electronics are mounted on the spacecraft top
deck. The sensor, supplied by NASA/Goddard Space Flight Center, has
eight selectable sensitivity levels with full scale outputs ranging from
4 nT to 65,536 nT. Internally, the field is sampled at 20 Hz and converted
to a 16-bit digital output. The signal can be digitally low pass filtered
and resampled to lower the output bandwidth. The output of any single axis
can be bandpassed between 1 and 10 Hz and reported in telemetry.
The magnetometer has an internal calibration coil that can be exercised by
command.
