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Cargo bay layout
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Z1 truss
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The primary mission of STS-92 is to conduct the ISS assembly operations.
STS-92 will carry two primary payloads, the Z1 truss and PMA-3, to orbit.
They are located in the cargo bay of the Space Shuttle of Discovery as shown
in the figure on the right.
The Z1 truss is a frame structure that has important functions for the early assembly
phase of the ISS. The first function is non-propulsive attitude control
of the ISS utilizing CMGs.
The second one is communicating with the ground facilities.
The Z1 truss will be attached to the zenith side of the Unity module. The
P6 truss will be attached to the Z1 truss during flight 4A (STS-97).
Click for Z1 detail.
PMA-3 |
Pressurized Mating Adapter 3 (PMA-3) is a docking port that connects the Space
Shuttle and ISS. PMA-3 is a mass of 1,156 kg.
PMA-3 will be attached to the nadir (Earth side) of Unity. During the two
flights to follow, STS-97 (flight 4A) and STS-98 (flight 5A), a Space Shuttle
will dock with this PMA-3.
The PMA is a pressurized structure that connects ISS components. It also
allows the Space Shuttle to dock with the ISS.
Two PMAs (PMA-1 and PMA-2) have been installed already on the ISS that
is now being constructed in space.
Outline of PMA and its usage
| PMA |
Mission name |
usage |
| PMA-1 |
2A
(STS-88) |
PMA-1 was launched attached to Unity, which was the primary
payload of STS-88. It was used to connect Unity with the Zarya module that
had been waiting on orbit. Zarya and Unity will operate together connected
by PMA-1. |
| PMA-2 |
PMA-2 was launched together with PMA-1 in the same STS-88
mission, but attached to the opposite side of the Unity module. On
this occasion, PMA-2 was used as the docking port for the Space Shuttle.
When the US Laboratory module "Destiny" ia launched by flight
5A, PMA-2 will be detached from Unity and will be moved to the Destiny. |
| PMA-3 |
3A
(STS-92) |
PMA-3 will be used as a docking port for the Space Shuttle
on flights 4A and 5A. When Node3 is launched on flight 20A, PMA-3 will
be moved from Node1 to Node3 |
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DC-to-DC Converter |
The DC-to- DC Converter (DDCU) converts the input voltage, ranging from
115 to 173Vdc, to a stable voltage of 123Vdc +- 3Vdc.
Two DDCUs will be launched on the STS-92 mission and will be attached to
the Z1 truss by extravehicular activity (EVA).
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EVA Tool Stowage Device |
The EVA Tool Stowage Device (ETSD) is an EVA tool box that will be attached to
the Z1 truss. Two ETSDs will be launched on the STS-92 mission, attached
to the Space Lab Pallet (SLP)
together with the PMA-3. ETSDs will be attached to the Z1 truss by EVA.
- IMAX Cargo Bay Camera 3 Dimension
The IMAX Three Dimensional Cargo Bay Camera (ICBC-3D) is sponsored by
NASA PAO. ICBC-3D is a 65mm color 3D motion picture camera system.
This camera will be located at the aft section of the Space Shuttle
cargo bay. A microphone and a recorder will be installed in the cabin,
so the voice of the crew member operating the camera will be recorded
simultaneously.
ICBD-3D will be carried to record the images of ISS assembly tasks conducted
by flight 3A. The film will be put on IMAX 3D theaters.
IMAX
http://www.imax.com/index.shtml
IMAX 3D Space Cameras
http://www.imax.com/innovations/latest_devs/spacecam.html
| Last Updated : September 28, 2000 |
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