Medium Class Explorers (MID EX)
ACE | ICON | Swift | TESS | THEMIS
Small Explorers (SMEX)
AIM | IBEX | IRIS | NuSTAR
Missions of Opportunity (MO)
GOLD | NICER
PSP | SDO | SET-1 | Solar Orbiter
HINODE (Solar-B) | MMS | STEREO | TIMED
Medium Class Explorers (MID EX)
FUSE | IMAGE | IMP-8 | RXTE (XTE) | WISE | WMAP (MAP)
Small Explorers (SMEX)
FAST | GALEX | RHESSI (HESSI) | SAMPEX | SWAS | TRACE
University Class Explorers (UNEX)/STEDI
CHIPS | SNOE
Missions of Opportunity (MO)
CINDI | HETE-2 | SUZAKU (ASTRO-E2) | TWINS