Atlantis Astronauts to Go Spacewalking for Fourth Time

crew news conference with reporters

Image above: The Expedition 15 and STS-117 crews participate in a crew news conference with reporters on Earth. Image credit: NASA TV

Mission Specialists Patrick Forrester and Steven Swanson will continue to activate the International Space Station’s new truss segment during STS-117’s fourth spacewalk. The astronauts are scheduled to begin the six-hour spacewalk at 12:53 p.m. EDT today.

The STS-117 crew installed the Starboard 3 and 4 (S3/S4) truss segment onto the station on June 11. The spacewalkers will check out the Drive Lock Assembly 2, one of two mechanisms that will drive rotation of the S3/S4 Truss Solar Alpha Rotary Joint (SARJ). They will remove the final launch restraints on the SARJ. The spacewalkers will also remove a keel pin and drag link from S3.

Other tasks scheduled for the spacewalk include the installation of a computer network cable onto the Unity module and the removal of a Global Positioning System antenna. The duo is also slated to complete the installation of a piece of debris shielding on the Destiny laboratory.

Forrester and Swanson conducted STS-117’s second spacewalk. Mission Specialists Jim Reilly and Danny Olivas conducted the other two. Today’s excursion will be the 88th spacewalk devoted to station assembly and maintenance.

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