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Understanding enhancements in outer ...

Schiller, Quintin George.

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Understanding enhancements in outer radiation belt electrons through measurements and modeling.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Understanding enhancements in outer radiation belt electrons through measurements and modeling./
Author:	Schiller, Quintin George.
Description:	303 p.
Notes:	Source: Dissertation Abstracts International, Volume: 77-05(E), Section: B.
Contained By:	Dissertation Abstracts International77-05B(E).
Subject:	Aerospace engineering. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3743623
ISBN:	9781339363684

Understanding enhancements in outer radiation belt electrons through measurements and modeling.
Schiller, Quintin George.

Understanding enhancements in outer radiation belt electrons through measurements and modeling. - 303 p.

Source: Dissertation Abstracts International, Volume: 77-05(E), Section: B.

Thesis (Ph.D.)--University of Colorado at Boulder, 2015.

Electrons in Earth's magnetosphere typically originate with energies below ten kiloelectron volts (keV). Electrons trapped in the radiation belts can have energies that exceed 10 MeV and must be naturally accelerated within Earth's magnetosphere. Still, the processes that govern this highly dynamic region are not fully understood. The outer radiation belt is not only a scientific puzzle but understanding it is an operational necessity, as these high energy electrons are capable of damaging spacecraft and can even result in spacecraft failure. In this work, we investigate our ability to observe these particles and understand the natural acceleration processes that generate them. We approach the problem on three fronts: (i) from an instrumentation perspective we develop a first-of-its- kind miniaturized particle telescope flown on a CubeSat platform, (ii) from an observational perspective we investigate in detail an outer belt enhancement case-study, and (iii) from a modeling perspective we develop a data assimilation model to better understand the mechanisms causing the acceleration. Finally, we construct an event-specific method to estimate electron lifetimes for diffusion models using CubeSat data, and use it to fully investigate the case study using the assimilative model, ultimately combining the three approaches. The ensuing results substantiate CubeSats as scientific observatories, demonstrate new data assimilation applications to the radiation belts, and strengthen our understanding of magnetospheric dynamics and the role of acceleration mechanisms.

ISBN: 9781339363684Subjects--Topical Terms:

1002622
Aerospace engineering.

Understanding enhancements in outer radiation belt electrons through measurements and modeling.
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020 $a 9781339363684
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100 1 $a Schiller, Quintin George. $3 3182387
245 1 0 $a Understanding enhancements in outer radiation belt electrons through measurements and modeling.
300 $a 303 p.
500 $a Source: Dissertation Abstracts International, Volume: 77-05(E), Section: B.
500 $a Adviser: Xinlin Li.
502 $a Thesis (Ph.D.)--University of Colorado at Boulder, 2015.
520 $a Electrons in Earth's magnetosphere typically originate with energies below ten kiloelectron volts (keV). Electrons trapped in the radiation belts can have energies that exceed 10 MeV and must be naturally accelerated within Earth's magnetosphere. Still, the processes that govern this highly dynamic region are not fully understood. The outer radiation belt is not only a scientific puzzle but understanding it is an operational necessity, as these high energy electrons are capable of damaging spacecraft and can even result in spacecraft failure. In this work, we investigate our ability to observe these particles and understand the natural acceleration processes that generate them. We approach the problem on three fronts: (i) from an instrumentation perspective we develop a first-of-its- kind miniaturized particle telescope flown on a CubeSat platform, (ii) from an observational perspective we investigate in detail an outer belt enhancement case-study, and (iii) from a modeling perspective we develop a data assimilation model to better understand the mechanisms causing the acceleration. Finally, we construct an event-specific method to estimate electron lifetimes for diffusion models using CubeSat data, and use it to fully investigate the case study using the assimilative model, ultimately combining the three approaches. The ensuing results substantiate CubeSats as scientific observatories, demonstrate new data assimilation applications to the radiation belts, and strengthen our understanding of magnetospheric dynamics and the role of acceleration mechanisms.
590 $a School code: 0051.
650 4 $a Aerospace engineering. $3 1002622
650 4 $a Physics. $3 516296
650 4 $a Geophysics. $3 535228
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690 $a 0373
710 2 $a University of Colorado at Boulder. $b Aerospace Engineering. $3 1030473
773 0 $t Dissertation Abstracts International $g 77-05B(E).
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791 $a Ph.D.
792 $a 2015
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3743623