INTERNATIONAL SPACE STATION
Expedition Two Science Operations
Status Report for the week ending,
April 11, 2001
The Expedition Two Space Station crew transmitted the first science
data to the scientists on the ground Wednesday night using the Station’s
Ku band antenna.
A massive 610 megabytes of data, representing 61
files of tests with the Middeck Active Control Experiment – MACE – were transmitted
from the Station to NASA ground controllers, who distributed it to experimenters.
Earlier Station science data on the Hoffman Reflex neurological experiment
was downlinked using the Space Shuttle communications system. Station science
data is transmitted using the KU band antenna because it can transmit data faster
than the S band antenna used for voice communications.
MACE studies the effects of vibrations on moving structures in space. The
results are expected to help engineers design and build lighter, stronger, space
The experiment platform is 60 inches (152 cm) long, including four struts and
five nodes. Astronauts use a hand control unit to make gimbals and reaction
wheels on one side to vibrate while gimbals and wheels on the other side try
to damp the vibration.
MACE involves science teams
from the Air Force Research Laboratory at Kirtland Air Force Base in New Mexico
and the Massachusetts Institute of Technology at Cambridge.
Flight Engineer Susan Helms conducted several tests
using the MACE equipment during the past week. In addition, the Expedition
Two crew also monitored the operation of automated
radiation-measuring experiments and participated in a study of crew relationships.
The Bonner Ball Neutron
Detector and the Dosimetric Mapping radiation experiments continued to collect
radiation data that will be used to more accurately predict human radiation
exposure during long-duration missions and develop counter-measures to
safely prolong human exposure to radiation during space travel. Flight Engineer
Jim Voss kept the experiment hard drives changed out with fresh units with additional
Dr. Tateo Goka, of the National Space Development Agency of Japan, is the principal
investigator for Bonner Ball. Dr. Guenter Reitz of the German Space Agency,
is the principal investigator for DOSMAP.
Using a laptop computer, the crew continued to fill out questionnaires as part
of the Interactions experiment. After the mission, their answers to questions
about living and working with their colleagues will help experimenters identify
and characterize interpersonal and cultural factors that may affect crew performance
Dr. Nick Kanas, of the Veterans Administration Medical
Center in San Francisco, is the principal investigator for Interactions.
A pair of Earth photography experiments – Crew Earth
Observations and EarthKAM – are on the crew’s task list for the week as time
permits during the early phase of setting up the orbiting laboratory.
The Payload Operations Center is also busy planning for the next Space Shuttle
mission, which will carry two additional payload racks and many new experiments
to the Space Station. These experiments include the first commercial experiments,
developed by private companies through NASA’s Commercial Space Centers across
the United States.
The Payload Operations Center at NASA’s Marshall Space Flight Center in Huntsville,
Ala., manages all science research experiments aboard the International Space
Station. The center is also home for coordination of the mission-planning work
of a variety of international sources, all science payload deliveries and retrieval,
and payload training and payload safety programs for the Station crew and all