國立虎尾科技大學 |

Satellite Swarms for Auroral Plasma Science.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Satellite Swarms for Auroral Plasma Science./
作者:	Parham, Jonathan Brent.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
面頁冊數:	152 p.
附註:	Source: Dissertations Abstracts International, Volume: 80-09, Section: B.
Contained By:	Dissertations Abstracts International80-09B.
標題:	Aeronomy. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=13422083
ISBN:	9780438972810

Satellite Swarms for Auroral Plasma Science.
Parham, Jonathan Brent.

Satellite Swarms for Auroral Plasma Science. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 152 p.

Source: Dissertations Abstracts International, Volume: 80-09, Section: B.

Thesis (Ph.D.)--Boston University, 2019.

This item must not be sold to any third party vendors.

With the growing accessibility of space, this thesis work sets out to explore space-based swarms to do multipoint magnetometer measurements of current systems embedded within the Aurora Borealis as an initial foray into concepts for space physics applications using swarms of small spacecraft. As a pathfinder, ANDESITE—a 6U CubeSat with eight deployable picosatellites—was built as part of this research. The mission will fly a local network of magnetometers above the Northern Lights. With the spacecraft due to launch on an upcoming ELaNa mission, here we discuss the details of the science motivation, the mathematical framework for current field reconstruction, the particular hardware implementation selected, the calibration procedures, and the pragmatic management needed to realize the spacecraft. After describing ANDESITE and defining its capability, we also propose a follow-on that uses propulsive nodes in a swarm, allowing measurements that can adaptively change to capture the physical phenomena of interest. To do this a flock of satellites needs to fall into the desired formation and maintain it for the duration of the science mission. A simple optimal controller is developed to model the deployment of the satellites. Using a Monte Carlo approach for the uncertain initial conditions, we bound the fuel cost of the mission and test the feasibility of the concept. To illustrate the system analysis needed to effectively design such swarms, this thesis also develops a framework that characterizes the spatial frequency response of the kilometer-scale filter created by the swarm as it flies through various current density structures in the ionospheric plasma. We then subjugate a nominal ANDESITE formation and the controlled swarm specified to the same analysis framework. The choice of sampling scheme and rigorous basic mathematical analysis are essential in the development of a multipoint-measurement mission. We then turn to a novel capability exploiting current trends in the commercial industry. Magnetometers deployed on the largest constellation to date are leveraged as a space-based magnetometer network. The constellation, operated by Planet Labs Inc., consists of nearly 200 satellites in two polar sun-synchronous orbits, with median spacecraft separations on the order of 375 km, and some occasions of opportunity providing much closer spacing. Each spacecraft contains a magneto-inductive magnetometer, able to sample the ambient magnetic field at 0.1 Hz to 10 Hz with < 200 nT sensitivity. A feasibility study is presented wherein seven satellites from the Planet constellation were used to investigate space-time patterns in the current systems overlying an active auroral arc over a 10-minute interval. Throughout the this work advantages, limitations, and caveats in exploiting networks of lower quality magnetometers are discussed, pointing out the path forward to creating a global network that can monitor the space environment.

ISBN: 9780438972810Subjects--Topical Terms:

1241245
Aeronomy.
Subjects--Index Terms:

Aurora

Satellite Swarms for Auroral Plasma Science.
LDR:04205nam a2200409 4500 001 951776
005 20200821052153.5
008 200914s2019 ||||||||||||||||| ||eng d
020 $a 9780438972810
035 $a (MiAaPQ)AAI13422083
035 $a (MiAaPQ)bu:14307
035 $a AAI13422083
040 $a MiAaPQ $c MiAaPQ
100 1 $a Parham, Jonathan Brent. $3 1241244
245 1 0 $a Satellite Swarms for Auroral Plasma Science.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2019
300 $a 152 p.
500 $a Source: Dissertations Abstracts International, Volume: 80-09, Section: B.
500 $a Publisher info.: Dissertation/Thesis.
500 $a Advisor: Semeter, Joshua L.
502 $a Thesis (Ph.D.)--Boston University, 2019.
506 $a This item must not be sold to any third party vendors.
520 $a With the growing accessibility of space, this thesis work sets out to explore space-based swarms to do multipoint magnetometer measurements of current systems embedded within the Aurora Borealis as an initial foray into concepts for space physics applications using swarms of small spacecraft. As a pathfinder, ANDESITE—a 6U CubeSat with eight deployable picosatellites—was built as part of this research. The mission will fly a local network of magnetometers above the Northern Lights. With the spacecraft due to launch on an upcoming ELaNa mission, here we discuss the details of the science motivation, the mathematical framework for current field reconstruction, the particular hardware implementation selected, the calibration procedures, and the pragmatic management needed to realize the spacecraft. After describing ANDESITE and defining its capability, we also propose a follow-on that uses propulsive nodes in a swarm, allowing measurements that can adaptively change to capture the physical phenomena of interest. To do this a flock of satellites needs to fall into the desired formation and maintain it for the duration of the science mission. A simple optimal controller is developed to model the deployment of the satellites. Using a Monte Carlo approach for the uncertain initial conditions, we bound the fuel cost of the mission and test the feasibility of the concept. To illustrate the system analysis needed to effectively design such swarms, this thesis also develops a framework that characterizes the spatial frequency response of the kilometer-scale filter created by the swarm as it flies through various current density structures in the ionospheric plasma. We then subjugate a nominal ANDESITE formation and the controlled swarm specified to the same analysis framework. The choice of sampling scheme and rigorous basic mathematical analysis are essential in the development of a multipoint-measurement mission. We then turn to a novel capability exploiting current trends in the commercial industry. Magnetometers deployed on the largest constellation to date are leveraged as a space-based magnetometer network. The constellation, operated by Planet Labs Inc., consists of nearly 200 satellites in two polar sun-synchronous orbits, with median spacecraft separations on the order of 375 km, and some occasions of opportunity providing much closer spacing. Each spacecraft contains a magneto-inductive magnetometer, able to sample the ambient magnetic field at 0.1 Hz to 10 Hz with < 200 nT sensitivity. A feasibility study is presented wherein seven satellites from the Planet constellation were used to investigate space-time patterns in the current systems overlying an active auroral arc over a 10-minute interval. Throughout the this work advantages, limitations, and caveats in exploiting networks of lower quality magnetometers are discussed, pointing out the path forward to creating a global network that can monitor the space environment.
590 $a School code: 0017.
650 4 $a Aeronomy. $3 1241245
650 4 $a Aerospace engineering. $3 686400
650 4 $a Plasma physics. $2 bicssc $3 1030958
653 $a Aurora
653 $a Constellation
653 $a Plasma
653 $a Small satellite
653 $a Space physics
653 $a Swarms
690 $a 0367
690 $a 0538
690 $a 0759
710 2 $a Boston University. $b Electrical & Computer Engineering. $3 1182426
773 0 $t Dissertations Abstracts International $g 80-09B.
790 $a 0017
791 $a Ph.D.
792 $a 2019
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=13422083