International space station: A testbed for experimental and computational dosimetry

Wilson, John W.; Cucinotta, Francis A.; Golightly, M. J.; Nealy, John E.; Qualls, Garry D.; Badavi, Mohammad; Angelis, G. De; Anderson, Brooke; Clowdsley, M. S.; Luetke, Nathan; Zapp, N.; Shavers, M. R.; Semones, E.; Hunter, A. B.

doi:10.1016/j.asr.2005.02.038

Cited by 26 publications

(22 citation statements)

References 22 publications

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“…The model for calculating the heavy-ion nuclear fragmentation cross sections are described by Wilson et al (1995b). HZETRN is used in a wide variety of radiation transport applications: e.g., the calculation of dosimetric quantities for assessing astronaut risk to space radiations on the International Space Station (ISS) and the Space Transportation System (STS) Shuttle, including realistic spacecraft and human geometry (Badavi et al, 2005;Slaba et al, 2009;Wilson & et al, 2006). The computation methods employed in HZETRN to solve the coupled cosmic ray integral transport equations in (24) are summarized below.…”

Section: Atmospheric Cosmic Ray Transportmentioning

confidence: 99%

Atmospheric Ionizing Radiation from Galactic and Solar Cosmic Rays

Mertens¹,

Kress²,

Wiltberger³

et al. 2012

Current Topics in Ionizing Radiation Research

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Section: Atmospheric Cosmic Ray Transportmentioning

confidence: 99%

Atmospheric Ionizing Radiation from Galactic and Solar Cosmic Rays

Mertens¹,

Kress²,

Wiltberger³

et al. 2012

Current Topics in Ionizing Radiation Research

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“…In a prior report (Wilson et al 2006b), we used the conventional westward drift of 0.3 degrees with an initial realignment of location such that AP8 MIN and MAX would be centered in 1965 and drift together 0.3 degrees per year into the future with an improved modulation function. A renewed analysis of drifting of fields will be addressed in a companion paper wherein the spatial distribution of the radiation is addressed.…”

Section: Trapped Proton Environmentmentioning

confidence: 99%

“…The proton omni-directional flux spectrum at any location and time f p (r,θ,φ,E,t) is then extrapolated using the following functional form of Wilson et al (1999Wilson et al ( , 2006b, see also Blanchard and Hess 1965) f p (r,θ,φ,E,t) = f p,min (r,θ,φ,E) exp{-α p …”

Section: Trapped Proton Environmentmentioning

confidence: 99%

“…Such models will not be adequate for the ISS mainly oriented in the local horizontal plane along the velocity vector (minimum drag) except during battery charging. In a previous paper, we developed a dynamic/anisotropic trapped proton environment and general Hampshire (Lockwood et al 1972) geomagnetic cutoff model (Wilson et al 2006b). These models are placed in a suitable form for evaluation of the incident radiation on the bounding surface of the six-degree of freedom motion of an orbiting spacecraft for shield evaluation.…”

Section: Leo Environmental Modelmentioning

confidence: 99%

“…We will distribute these benchmarks with the code package to evaluate future compiler and platform dependent problems in addition to future drift for whatever reason. This revised 1995 HZETRN code, chronicled as the 2005 HZETRN (Wilson et al 2006a), is recommended for standard practice and the present paper will focus on using measurements aboard ISS and recently improved models of the low Earth orbit (LEO) environment (Wilson et al 2006b) for code validation. In addition to adding directional dependence and solar modulation to the improved trapped proton model AP8, we further developed a directional dependent geomagnetic transmission model.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Pre-engineering spaceflight validation of environmental models and the 2005 HZETRN simulation code

Nealy

Cucinotta

Wilson

et al. 2007

Advances in Space Research

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The HZETRN code has been identified by NASA for engineering design in the next phase of space exploration highlighting a return to the Moon in preparation for a Mars mission. In response, a new series of algorithms beginning with 2005 HZETRN, will be issued by correcting some prior limitations and improving control of propagated errors along with established code verification processes. Code validation processes will use new/improved low Earth orbit (LEO) environmental models with a recently improved International Space Station (ISS) shield model to validate computational models and procedures using measured data aboard ISS. These validated models will provide a basis for flight-testing the designs of future space vehicles and systems of the Constellation program in the LEO environment.

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Segmental interpolating spectra for solar particle events and in situ validation

Zeitlin

Atwell

et al. 2016

Space Weather

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It is a delicate task to accurately assess the impact of solar particle events (SPEs) on future long‐duration human exploration missions. In the past, researchers have used several functional forms to fit satellite data for radiation exposure estimation. In this work we present a segmental power law interpolating algorithm to stream satellite data and get time series of proton spectra, which can be used to derive dosimetric quantities for any short period during which a single SPE or multiple SPEs occur. Directly using the corrected High Energy Proton and Alpha Detector fluxes of GOES, this method interpolates the intensity spectrum of a typical SPE to hundreds of MeV and extrapolates to the GeV level as long as sufficient particles are recorded in the high‐energy sensors. The high‐energy branch of the May 2012 SPE is consistent with the Band functional fitting, which is calibrated with ground level measurement. Modeling simulations indicate that the input spectrum of an SPE beyond 100 MeV is the major contributor for dose estimation behind the normal shielding thickness of spacecraft. Applying this method to the three SPEs that occurred in 2012 generates results consistent with two sets of in situ measurements, demonstrating that this approach could be a way to perform real‐time dose estimation. This work also indicates that the galactic cosmic ray dose rate is important for accurately modeling the temporal profile of radiation exposure during an SPE.

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International space station: A testbed for experimental and computational dosimetry

Cited by 26 publications

References 22 publications

Atmospheric Ionizing Radiation from Galactic and Solar Cosmic Rays

Atmospheric Ionizing Radiation from Galactic and Solar Cosmic Rays

Pre-engineering spaceflight validation of environmental models and the 2005 HZETRN simulation code

Segmental interpolating spectra for solar particle events and in situ validation

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