Paleoceanography: A new AGU journal



Even though the geomagnetic field is one of the earth's most pervasive geophysical phenomena, its origin and temporal variations are poorly understood. Satellites, which can quickly and accurately measure the field, have been used only on an occasional and opportunistic basis since 1958, when Sputnik 3 was launched. Since that time, some 13 magnetic field satellites have been launched with the last, the MAGSAT mission, lasting 7 months during 1979–1980. Detailed interpretations have been sketchy, because of the or-bits, the limited lifetime of each mission, or he infrequent nature of the missions.