International Space Station Flight 11A
payload for STS-113 is the P1 (P-One) Truss. It will be the fourth
piece of the Integrated Truss Structure delivered to the station
and will be attached to the port side of the S-0 (S-Zero) Truss.
The P1, which
is primarily an aluminum structure, measures 13.7 meters (45 feet)
long, 4.6 meters (15 feet wide) and 4 meters (13 feet) high and
weighs 12,477 kilograms (27,506 pounds). With the addition of
the P1, the Integrated Truss Structure will span 40.8 meters (134
feet). The P1 will also extend the station's Mobile Transporter
S1, the P1 will provide structural support for the station's Active
Thermal Control System with three radiators that contain eight
panels each. The new truss has mounts for cameras and lights and
contains a UHF antenna system. The P1 also has a port for an S-band
antenna system, which is currently located on the P6 Truss and
will be installed by spacewalkers on an upcoming mission.
the P1 is the second Crew and Equipment Translation Aid, or CETA,
cart. The first CETA cart arrived with the S1. The carts are manually
operated by a spacewalker and can also be used as a work platform.
The P1 is
scheduled to be attached to the station on Flight Day 4 by Canadarm2,
the station's robot arm. STS-113 Mission Specialists Michael Lopez-Alegria
and John Herrington will conduct three spacewalks to activate and out the P1.