Interplanetary(IP)shock encountering the terrestrial magnetosphere can greatly disturb the Earths electromagnetic environment and hence intensify the global current system.
Polar cap arcs(PCAs)are one of the outstanding phenomena in the polar cap region.Some periodic poleward moving PCAs were simultaneously detected both by dual all-sky imagers,one at the Chinese Yellow
While the space based exoplanet survey projects(e.g.Kepler)have achieved great success,there is still valuable exoplanetary science that can be done from the ground.
Aurora spectral image electronically preserves spectral information and visual observation of aurora during a period to be studied later,which are helpful for the research of earthsolar activities and