An EXpedite the PRocessing of Experiments to Space Station (ExPRESS) Logistics Carrier (ELC) is an unpressurized attached payload platform for the International Space Station (ISS) that provides mechanical mounting surfaces, electrical power, and command and data handling services for Orbital Replacement Units (ORUs) as well as science experiments on the ISS.The ELCs were developed primarily at the Goddard Space Flight Center in Greenbelt, Maryland, with support from JSC, KSC, and MSFC.An ELC provides scientists with a platform and infrastructure to deploy experiments in the vacuum of space without requiring a separate dedicated Earth-orbiting satellite.Each one is capable of providing scientists with a platform and infrastructure to deploy experiments in the vacuum of space without requiring a separate dedicated Earth-orbiting satellite.The FCU runs the free open-source real-time operating system (RTOS) RTEMS and provides the computing and communication resources as an ELC Command and Data Handling (C&DH) system with the following major goals: Manifested on ELC-2 was the first ELC-based payload, Materials for ISS Experiment (MISSE-7).
Layout and structure of the ELC
ELC steel framework during final fabrication at
GSFC
Location of ELCs and ESPs on the International Space Station.
ELC-1 in its launch configuration, note STP-H4 added Aug. 2013
ELC-2 in its launch configuration, note changes since installation
ELC-3 in its launch configuration, note STP-H3 removed, SCAN added