Table of Contents

STS-113 Mission Timeline

Canadian Robotic Activities

Flight Day 4 (FD4): November 26, 2002--Installation of the Port One (P1) truss Segment

The Starboard One (S1) and Port One (P1) trusses were attached to the Starboard Zero (S0) truss on the International Space Station. These trusses provide structural support for the Active Thermal Control System, the Mobile transporter (MT), the Mobile Base System (MBS) and Crew and Equipment translation Aid (CETA) cart.

During this mission spacewalkers, assisted by Canadarm2, attached the P1 truss to the Starboard Zero (S0) truss, already in place on the laboratory module Destiny. Astronauts conducted three spacewalks to complete installation and assembly of the P1 truss. Space Shuttle Atlantis delivered the S1 truss to the Station in October 2002. It is attached to the other side of the S0 truss. The firsts steps of the installation of the P1 truss were:

Left: Animation of P1truss Installation on ISS.
Right: Actual installation of P1 on the ISS.

• The truss was removed from the Shuttle cargo bay by the (Shuttle) Canadarm;

• The Canadarm transferred the truss segment to Canadarm2. Canadarm2 installed it in its final position.

P1 truss placement on the ISS

Relocation of the Crew Cart--November 28, 2002

The crew and equipment translation aid (CETA) cart moved spacewalkers along the rails to worksites on the truss structure. The first CETA cart arrived with the S1 truss. The carthad to be manually operated by a one or more spacewalker and was also used as a work platform. The S1 and P1 trusses carry one cart each.

• The CETA cart2 was relocated from the left side of the P1 truss to the right side to allow the Mobile Base System to move all the way down to the end of the rail line;

• Canadarm2 provided support to a spacewalking astronaut during the relocation of the CETA cart2.

EVA 3/ Flight Day 8: November 30, 2002--The MBS is Moving

Spacewalkers:

• Michael Lopez-Alegria

• John Herrington

The two trusses house the Active Thermal Control System. This system acts like the cooling system in a car radiator except that this system uses 99.9 percent pure ammonia compared to 1 percent in household products. The system will provide temperature control for the Space Station’s electronics.

On Flight Day 8:

• Canadarm2 stepped off the Mobile Base System to the Lab.

• The Mobile transporter/ Mobile Base System moved to the end of the P1 truss;

• Canadarm2 anchored itself on the Mobile Base System attached to the Mobile transporter for EVA3;

• Canadarm2 provided support to the spacewalkers;

• Once support to the spacewalkers was complete, Canadarm2 detached from the Mobile transporter/ Mobile Base System, allowing the MT/MBS to move back to its initial position.

MBS moving along the truss segment
with spacewalker on Canadarm2