Initial Characterization of the Microgravity Environment of the International Space Station: Increments 2 Through 5

Details Initial Characterization of the Microgravity Environment of the International Space Station: Increments 2 Through 5 Initial Characterization of the Microgravity Environment of the International Space Station: Increments 2 Through 5

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002iaf..confe.551j&link_type=abstract

IAF abstracts, 34th COSPAR Scientific Assembly, The Second World Space Congress, held 10-19 October, 2002 in Houston, TX, USA.,

Computer Science

Scientific paper

The primary objective of the International Space Station (ISS) is to provide a long-term reduced gravity environment for the conduct of scientific research for a variety of microgravity science disciplines. With the completion of flight of STS-100 (ISS flight 6A), the Microgravity Environment Program at the NASA Glenn Research Center delivered two acceleration measurement systems to the International Space Station. These acceleration measurement systems provide a generic service to microgravity payloads by measuring the quasi-steady and the vibratory acceleration environments on board the station. The Microgravity Acceleration Measurement System measures accelerations in the quasi-steady regime, including the contributions of aerodynamic drag, vehicle rotation, and vehicle venting effects. The Space Acceleration Measurement System-II measures on-board disturbances in the vibratory regime resulting from vehicle systems, crew activity, and experiment hardware. This paper presents to the microgravity scientific community the results of the initial characterization of the microgravity environment of the International Space Station for increments 2 through 4. Also, the role of the Principal Investigator Microgravity Services (PIMS) project is described in terms of ISS acceleration data distribution, processing, achieving, analyzing and characterization of the ISS as well as its interaction with the principal investigator teams. The results discussed in this paper covered both the quasi-steady and the vibratory acceleration environment of the station during its first year of operation. The ISS quasi-steady microgravity environment is described for increments 2 through 4. Results are presented and discussed for the following: Torque Equilibrium Attitude (TEA) and the X Axis Perpendicular to the Orbital Plane (XPOP) ISS attitudes; ISS docking attitudes and their effect on the quasi-steady acceleration environment as well as the impact of STS joint operation with ISS on the quasi-steady environment; EVA cabin de-pressurizations and ISS water dumps and their corresponding effects on the quasi-steady environment. The ISS vibratory/transient microgravity environment is described for ISS increments 2 through 4 for the following: crew exercise, docking events, and the activation/de-activation of both ISS life support system hardware and ISS experiment hardware.

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