INTERNATIONAL SPACE STATION
             Expedition Two Science Operations Status Report #10
                      for the week ending June 6, 2001

        An experiment to measure vibrations as small as a rotating fan or as
 big as a docking spacecraft began its watchdog role on the orbiting
 laboratory this week.

        The Space Acceleration Measurement System II (SAMS-II) is designed
 to measure vibrations that could degrade delicate microgravity experiments
 on board the Station.  Scientists need to understand the vibration
 environment so they can better understand their experiment results and
 perhaps compensate for the vibrations.

        "For instance, if there is an experiment in EXPRESS Rack 1 in the
 U.S. lab and a crew member is exercising on the treadmill in the Service
 Module, we want to be able to tell scientists what disturbance levels they
 can expect from that activity," said Kevin McPherson, project manager for
 Principal Investigator Microgravity Services at NASA's Glenn Research
 Center, Cleveland, Ohio.

        The SAMS-II sensor activated Monday, June 4, is located in EXPRESS
 Rack 2 in the Destiny lab module.  Four additional sensors are located in
 drawers in EXPRESS Rack 1 and are scheduled for activation next week.  Since
 1991, SAMS has flown on 20 Space Shuttle missions and operated on Russia's
 Mir space station for about four years - the longest operational U.S.
 hardware on the former Russian outpost.  It is one of two acceleration
 measurement systems developed by the Glenn field center.  The other -- the
 Microgravity Acceleration Measurement Systems (MAMS) -- was activated
 earlier and has recorded disturbances including the docking of a Russian
 Progress resupply ship.

        On Tuesday, June 5, Flight Engineer Susan Helms activated the third
 of six growth cylinders in the Protein Crystal Growth Single Thermal
 Enclosure System Unit 10.  Every chemical reaction essential to life depends
 on the function of the proteins and other biological molecules, some of
 which will be studied as a result of this experiment.  Analyses of
 biological material samples grown on the Station may lead to improved
 understanding of their structure and the biological processes that they
 control.  In microgravity, scientists hope that these materials can be grown
 larger and more perfectly ordered than is possible on Earth.

        The Expedition Two crew continued during the past week to maintain
 and operate the orbiting laboratory's science payloads as they prepared for
 a spacewalk.

        On Sunday, June 3, Helms performed tests with the Middeck Active
 Control Expeirment (MACE II) space structures experiment. Flight Engineer
 Jim Voss conducted the nutrient exchange required by the Advanced
 Astroculture (ADVASC) plant growth experiment and did computer-based
 familiarization to perform gas and condensate sampling on ADVASC.  These
 activities are required to feed the plants and understand growing conditions
 inside the plant experiment.  Video downlinked indicated the plants are
 growing well.  Also last weekend, Voss downloaded data from a portable
 sensor for the Dosimetric Mapping (DOSMAP) experiment to characterize the
 radiation environment on the Station.

        On Friday, June 1, the crew transferred radiation data from the
 Phantom Torso and Bonner Ball and DOSMAP experiments to storage computers on
 board.

        The crew's week included additional Crew Earth Observations (CEO)
 photography activities.  CEO targets for June 6 through June 9 include the
 Red Basin, Sechuan Province, China; Yellow River Delta near Beijing; Ganges
 River Basin; Rift Triple Junction in Ethiopia; and expansion of the Suez
 Canal system and agriculture east of the Canal; Central Philippine Islands;
 Rukwa Transform, Tanzania; Yangtze River Delta; major urban industrial
 centers in southeastern Africa; Kilimanjaro Tropical Glacier; and the Rift
 Triple Junction in Ethiopia.  These sites are of interest to scientists
 studying global warming and agricultural and urban development.

        The crew continued to fill out the computer questionnaire as part of
 the Interactions study of crew relationships during long space missions.

        Science payload activities later this week are expected to be
 limited as the crew prepares for a 35-minute space walk.  Several activities
 are on a task list of optional items for the crew if they have time,
 including: operations with the three expedition's radiation experiments,
 Interactions sessions, continued ADVASC maintenance activities and
 photography and film loading for the Crew Earth Observations experiment.
 Normal operations continue with the Destiny laboratory module's three major
 science facilities - the Human Research Facility and EXPRESS Racks 1 and 2.
 In addition to the radiation experiments, other research currently operating
 on the Station includes the Commercial Protein Crystal Growth, and
 Experiment on the Physics of Colloids in Space.  Science teams on the ground
 are evaluating the impact of changes to the Space Shuttle launch schedule.

        Of the 18 experiments planned for Expedition Two, one is completed,
 one failed and was deactivated, 13 others have been activated and are in
 progress, one is partially activated, one remains to be fully set up and
 activated, and one remains to be launched this summer on the 7A Station
 assembly mission.