The Mars Pathfinder Magnetic Properties
Experiment primarily involves an array of permanent magnets on the lander.
The magnets are assembled to produce a bulls-eye pattern of attracted dust
using an outer annular ring magnet, 18mm in diameter, surrounding a central
cylindrical magnet. In each of two magnet arrays, five such magnets of progressively
increasing strength, are mounted in magnesium blocks.
These magnets are intended to attract
any magnetic particles in the windborne dust. The picture shows a magnet
array on Sol 6 and on Sol 13. Dust has clearly accumulated on the two strongest
magnets. As more dust is attracted with time, we expect the patterns on
the magnets to become clearer.