The Analyzer for Cusp Electrons (ACE) is designed to measure electron activity in the region of the northern magnetospheric ...

marking the needle direction each time join the points to show the field lines The needle of a plotting compass points to the south pole of the magnet. The behaviour of a compass shows that the ...

marking the needle direction each time join the points to show the field lines The needle of a plotting compass points to the south pole of the magnet.