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The residual acceleration environment of an orbiting spacecraft in low earth orbit is a complex phenomenon.
Many factors, such as experiment operation, life-support systems, crew activities, aerodynamic drag,
gravity gradient, rotational effects and the vehicle structural resonance frequencies (structural modes)
contribute to form the overall reduced gravity environment.
SAMS-II will record acceleration
disturbances caused by the ISS, its crew, and equipment. A complete understanding of the vibration
environment will help researchers develop methods to minimize disturbances. It also allows other principal
investigators to design their payloads with the vibration environment in mind.
SAMS-II provides environmental data for scientific experiments that are conducted onboard the ISS. Results
will be used to generalize the types of vibrations affecting vibration-sensitive experiments. Investigators
seek to better understand the vibration environment on the space station to enable future research.
The objective of this test was to determine whether the acoustic emission levels emitted from the SAMS-II
RTS and ICU drawers met the EXPRESS Rack limits for continuous noise associated with subrack payloads.
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