Return to Human Space Flight home page

STS-105: Home | The Crew | Cargo | Timeline | EVA

International Space Station Assembly Flight 7A.1

IMAGE: Leonardo in payload bay, STS-102
Leonardo's first trip to the International Space Station was aboard Space Shuttle Discovery in March 2001.

Leonardo Multi-Purpose Logistics Module
The Leonardo Multi-Purpose Logistics Module, which was provided by the Italian Space Agency (ASI), is the primary payload for STS-105. Leonardo will be making its second flight to the International Space Station. It is one of three such pressurized modules that serve as the ISS's "moving vans," carrying laboratory racks filled with equipment, experiments and supplies to and from the station aboard the space shuttle.

The unpiloted, reusable logistics modules function as both a cargo carrier and a space station module when flown. Mounted in the space shuttle's cargo bay for launch and landing, they are berthed to the station using the shuttle's robotic arm after the shuttle has docked. While berthed to the station, racks of equipment are unloaded from the module and then old racks and equipment may be reloaded to be taken back to Earth.

For STS-105, Leonardo will be outfitted with 12 racks of experiments and equipment. Two EXPRESS racks will be transferred to ISS. In addition to these two racks, there are six Resupply Stowage Racks and four Resupply Stowage Platforms filled with logistics and supplies requiring transfer to ISS.

Materials International Space Station Experiment
The Materials International Space Station Experiment, or MISSE, Project is a NASA/Langley Research Center-managed cooperative endeavor to fly materials and other types of space exposure experiments on the International Space Station. The objective is to develop early, low-cost, non-intrusive opportunities to conduct critical space exposure tests of space materials and components planned for use on future spacecraft.

Johnson Space Center, Marshall Space Flight Center, Glenn Research Center, the Materials Laboratory at the Air Force Research Laboratory and Boeing Phantom Works are participants with Langley in the project.

The MISSE experiment will be the first externally mounted experiment conducted on the ISS. The experiments are in four Passive Experiment Containers, or PECs, that were initially developed and used for an experiment on Mir in 1996 during the Shuttle-Mir Program.

Hitchhiker Experiments Advancing Technology
The Hitchhiker Experiments Advancing Technology, or HEAT, is a collection of Get Away Special (GAS) canisters all under the direction of Goddard Space Flight Center. It consists of the following experiments:

Advanced Carrier Equipment Avionics System
The Advanced Carrier Equipment, or ACE, Avionics System has been designed to replace the Hitchhiker Avionics.
Simplesat is an engineering satellite designed to evaluate the use of inexpensive commercial hardware for spacecraft. It is expected that Simplesat will demonstrate Global Positioning System attitude control and fine pointing control while in free-flyer low-Earth orbit.
Student Experiment Module
The Student Experiment Module, or SEM, is housed in a sealed, extended 0.14-cubic-meter (5-cubic-foot) canister mounted in the aft position of the port adapter beam. The SEM will contain up to 10 small, enclosed modules, each containing a separate, passive experiment designed and constructed by students.
The objective of the G-774 experiment is to increase the understanding of smoldering combustion in a long-term microgravity environment. This experiment will focus on one-dimensional smoldering polyurethane foam.

GAS Canister G-780 Payload
The GAS G-780 payload is sponsored by Mayo High School, Rochester, Minn. The objective of the G-780 experiment is to investigate cell growth in microgravity. The experiment utilizes six growing chambers containing various seed types.

What is a payload?
IMAGE: Shuttle payload bay
The formal designation as a "payload" indicates that the experiment will be accorded top priority in crew time and energies during the entire flight, along with all other experiments carrying the same "payload" designation.
Related Links
*STS-105 KSC Electronic Photo File
*Payload Overview (Shuttle Presskit)
*Hitchhiker Experiments
Advancing Technology (HEAT)
*HEAT Mission Control
Room Live Webcam
*Materials International Space Station Experiment (MISSE)
*Student Experiment Module

Curator: Kim Dismukes | Responsible NASA Official: John Ira Petty | Updated: 04/07/2002
Web Accessibility and Policy Notices