A Status Report on the Characterization of the Microgravity Environment of the International Space Station

Jules, Kenol

doi:10.2514/6.iac-03-j.6.01

Cited by 9 publications

(11 citation statements)

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“…Inside the vehicle, the quality of weightlessness is influenced by so-called ''g-jitters,'' that is, vibrations caused by onboard machinery, movement of astronauts, thruster operation, and so on. The ''microgravity'' level may range between * 10 -3 to 10 -6 g, depending on the location within the spacecraft and the frequency of vibration (Tryggvason et al, 2001;Penley et al, 2002;Jules et al, 2004). In life-science experiments, we are interested in the impact of mechanical stresses generated through the force of gravity on the mass of the organism.…”

Section: Simulated Microgravitymentioning

confidence: 99%

Ground-Based Facilities for Simulation of Microgravity: Organism-Specific Recommendations for Their Use, and Recommended Terminology

et al. 2013

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Research in microgravity is indispensable to disclose the impact of gravity on biological processes and organisms. However, research in the near-Earth orbit is severely constrained by the limited number of flight opportunities. Ground-based simulators of microgravity are valuable tools for preparing spaceflight experiments, but they also facilitate stand-alone studies and thus provide additional and cost-efficient platforms for gravitational research. The various microgravity simulators that are frequently used by gravitational biologists are based on different physical principles. This comparative study gives an overview of the most frequently used microgravity simulators and demonstrates their individual capacities and limitations. The range of applicability of the various ground-based microgravity simulators for biological specimens was carefully evaluated by using organisms that have been studied extensively under the conditions of real microgravity in space. In addition, current heterogeneous terminology is discussed critically, and recommendations are given for appropriate selection of adequate simulators and consistent use of nomenclature.

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Section: Simulated Microgravitymentioning

confidence: 99%

Ground-Based Facilities for Simulation of Microgravity: Organism-Specific Recommendations for Their Use, and Recommended Terminology

et al. 2013

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“…The transient component is composed of those accelerations that last for a short period of time, and are non-periodic. The frequency content varies over the entire frequency spectrum of the data [3]. Unlike the quasi-steady component, the vibratory and transient components need to be measured near the location of interest; no reliable mathematical predictions can be made relative the propagation of a vibratory/transient disturbance through the vehicle.…”

Section: Microgravity Environmentmentioning

confidence: 99%

“…Each sensor head has a defined coordinate system whose location and orientation is defined with respect to the Space Station Analysis Coordinate System [4]. Each origin is defined at the triaxial center point of the three accelerometers that comprise the head.…”

Section: Data Measurement Onboard the Iss Configuration -Prior To Colmentioning

confidence: 99%

“…The selection of a common coordinate system allows for much easier comparison of data from different locations in the various laboratories. [4] ACCELEROMETER DESCRIPTION The ability to measure the three components of the overall microgravity environment is handled by two different types of measurement systems: quasi-steady and vibratory. On the ISS, quasi-steady acceleration measurements are obtained by the Microgravity Acceleration Measurement System's (MAMS) Orbital Acceleration Research Experiment (OARE) Sensor Subsystem (OSS).…”

Section: American Institute For Aeronautics and Astronauticsmentioning

confidence: 99%

“…Its name stems from the fact that it serves to summarize magnitude and frequency variations of key spectral contributors for a relatively long period of time. [3] PIMS WEB SITE CAPABILITIES The primary interface to the acceleration data provided by PIMS and the various ISS acceleration measurement systems is the PIMS ISS web site. This public web site (http://pims.grc.nasa.gov) provides links to real-time acceleration data, as well as analyzed acceleration data American Institute for Aeronautics and Astronautics 5 products.…”

Section: Data Analysis Techniques and Processingmentioning

confidence: 99%

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