Did
you know?
Not
all payloads are carried to orbit in
the Shuttle's cargo bay. In-cabin payloads are carried in
the Shuttle's middeck. Cargo bay payloads are typically large
payloads, such as satellites and Space Station modules, which
do not require a pressurized environment. In contrast, in-cabin
payloads are generally smaller, and are not usually designed
for an unpressurized environment like the cargo bay.
The
P1 Integrated Truss Segment (ITS) is a mirror image of the
S1 ITS that was installed on the ISS during STS-112. Whereas
S1 was installed on the starboard side of the central truss
segment, the S0 ITS, P1 will be installed on the port side.
There are very few differences between the P1 and S1 truss
segments. For example, an S-band communication system is
on the S1, but a UHF system is installed on the P1.
|
STS-113
Payloads
International Space Station Flight 11A
P1
Truss
The primary 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
rail line.
Like the
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.
Mounted
to 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 outfit the P1.
The secondary
payload is the Micro-Electromechanical System (MEMS) Based Pico
Satellite Inspector which will deploy two small satellites called
"Picostats" which will be connected via a 50 ft. long
tether. They are battery powered and their soul purpose is to
demonstrate autonomous operation of inspection satellites and
low power and mass (MEMS) system-level technology.
Live
Launch Coverage
| Crew EVA |
Mission & Crew
|
