EntityQ54208· pop 9· linked from 239 articlesMagSatSign in to savejoint NASA and USGS satellite for studying Earth's magnetic fieldConnectionsExplorers ProgramEntityCassini−HuygensEntityVenus ExpressEntityAquaEntityScoutEntityTropical Rainfall Measuring MissionEntityGlobal Change Observation MissionEntityEarthConceptSunConceptCaliforniaEntityJupiterEntityNASAConceptelectronicsEntityUTCEntitycaesiumEntityWayback MachineEntityrandom-access memoryEntitypublic domainEntitydigital object identifierEntityEarth's crustEntityCategoriesApplications Explorer MissionExplorers ProgramGeomagnetic satellitesSource attributionSpacecraft launched in 1979