The orbiter boom sensor system or OBSS is installed in space shuttle Atlantis' payload bay.

In Orbiter Processing Facility 1 at NASA's Kennedy Space Center in Florida, the orbiter boom sensor system, or OBSS, is installed in space shuttle Atlantis' payload bay.

The OBSS' inspection boom assembly, or IBA, is removed from the arm every other processing flow for a detailed inspection. After five consecutive flights, all IBA internal components are submitted to a thorough electrical checkout in the Remote Manipulator System Lab. The 50-foot-long OBSS attaches to the end of the shuttle’s robotic arm and supports the cameras and laser systems used to inspect the shuttle’s thermal protection system while in space. Atlantis is next slated to deliver an Integrated Cargo Carrier and Russian-built Mini Research Module to the International Space Station on the STS-132 mission. Launch is targeted for May 14. Photo credit: NASA/Jim Grossmann