Space Shuttle mission STS-41C onboard view of the revived Solar Maximum Mission Satellite (SMMS). As part of the mission the crew demonstrated the capability of the shuttle to rendezvous, service, check-out and deploy an on-orbit satellite. Also as part of the redeployment, the SMMS was fitted with a Long Duration Exposure Facility (LDEF), which provides accommodations for experiments requiring long-term exposure to the space environment. the STS-41C mission was launched aboard the Space Shuttle Orbitor Challenger on April 6, 1984.