JAXA/ISAS's JIKIKEN (EXOS-B) was a magnetosphere-observation mission launched on 1978-09-16 aboard M-3H-3 from Uchinoura. It studied the plasmasphere and deep magnetosphere, plasma-wave and particle interactions, and coordinated observations with KYOKKO during the International Magnetospheric Study.
Alerts are unavailable because this mission is no longer active.