Deriving the Magnetopause Position from the Soft X‐Ray Image by Using the Tangent Fitting Approach

Sun, Tianran; Wang, Chi; Connor, H. K.; Jorgensen, A. M.; Sembay, S.

doi:10.1029/2020ja028169

Cited by 32 publications

(41 citation statements)

References 23 publications

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“…Combining the advantages of TDA and DFA, Sun et al (2020) developed a new method to derive the 3D magnetopause from a single X-ray image. The basic idea is similar to BFA in Jorgensen et al (2019a, b) as introduced above, which compares the information provided by the X-ray image as well as a parameterized magnetospheric system in order to find the best match.…”

Section: Tangent Fitting Approach (Tfa)mentioning

confidence: 99%

Methods to derive the magnetopause from soft X-ray images by the SMILE mission

Wang

Sun

2022

Geosci. Lett.

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Solar wind Magnetosphere Ionosphere Link Explorer (SMILE) is a novel self-standing mission dedicated to observing the solar wind–magnetosphere coupling via simultaneous in situ solar wind/magnetosheath plasma and magnetic field measurements, soft X-ray images of the magnetosheath and polar cusps, and UV images of global auroral distributions. While analyzing the observed images after the launch of SMILE, it will be a challenging task to reconstruct the 3-dimensional surface of the magnetopause from 2-dimensional images. Therefore, one of the most important key issues about SMILE is the reconstruction of magnetopause from X-ray images. This paper will review four main approaches have been developed so far, namely, the boundary fitting approach (BFA), the tangent fitting approach (TFA), the tangential direction approach (TDA), and the computed tomography approach (CTA). We will discuss their scope of application and pros and cons, and hopefully inspire future efforts.

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Section: Tangent Fitting Approach (Tfa)mentioning

confidence: 99%

Methods to derive the magnetopause from soft X-ray images by the SMILE mission

Wang

Sun

2022

Geosci. Lett.

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“…In the previous work, we demonstrated the lobster-eye model and ray tracing method based on imaging simulation and magnetohydrodynamic (MHD) model (Peng et al, 2018;Sun et al, 2019Sun et al, , 2020. Here, we use MHD model to simulate dayside magntosheath X-ray intensity distribution (Wang et al, 2013).…”

Section: Observing Simulationmentioning

confidence: 99%

A Lunar-based Soft X-ray Imager (LSXI) for the Earth’s magnetosphere

Guo

Wang

Wei

et al. 2021

Sci. China Earth Sci.

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We propose to use the Moon as a platform to obtain a global view of Earth's magnetosphere by a Lunar-based Soft X-ray Imager (LSXI). LSXI is a wide field-of-view Soft X-ray telescope, which can obtain X-ray images of Earth's magnetosphere based on the solar wind charge exchange (SWCX) X-ray emission. Global perspective is crucial to understand the overall interaction of the solar wind with magnetosphere. LSXI is capable of continuously monitoring the evolution of geospace conditions under the impact of the solar wind by simultaneous observation of the bow shock, magnetosheath, magnetopause and cusps for the first time. This proposal is answering the call for the Chinese Lunar Exploration Program Phase IV.

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“…A number of boundary tracing algorithms have been developed and compared in view of their application in the analysis of SXI images returned during SMILE operational phase. These include the tangential direction approach (TDA) of Collier and Connor (2018) and the tangent fitting approach (TFA) of Sun et al (2020). On the basis of the limb brightening effect Collier and Connor assert that the soft X-ray peak direction is tangent to the magnetopause and derive an analytical formula of the magnetopause location as a function of spacecraft location and soft X-ray peak angles.…”

Section: Cme-driven Geomagnetic Stormsmentioning

confidence: 99%

The SMILE mission: A novel way to explore solar-terrestrial interactions

Branduardi‐Raymont¹,

Wang²,

Escoubet³

et al. 2020

Preprint

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The coupling between the solar wind and the Earth's magnetosphere-ionosphere system, and the geospace dynamics that result, comprise some of the key questions in space plasma physics. In situ measurements by a fleet of solar wind and magnetospheric missions, current and planned, can provide the most detailed observations of the Sun-Earth connections. However, we are still unable to quantify the global effects of the drivers of such connections, and to monitor their evolution with time. This information is the key missing link for developing a comprehensive understanding of how the Sun gives rise to and controls the Earth's plasma environment and space weather.SMILE (Solar wind Magnetosphere Ionosphere Link Explorer) is a novel self-standing mission dedicated to observing the solar wind - magnetosphere coupling via simultaneous X-ray imaging of the magnetosheath and polar cusps (large spatial scales at the magnetopause), UV imaging of global auroral distributions (mesoscale structures in the ionosphere) and in situ solar wind/magnetosheath plasma and magnetic field measurements. X-ray imaging of the magnetosheath and cusps is made possible by the X-ray emission produced in the process of solar wind charge exchange, first observed at comets, and subsequently found to occur in the vicinity of the Earth's magnetosphere. One of the science aims of SMILE is to track the substorm cycle, via X-ray imaging on the dayside and by following its consequences on the nightside with UV imaging.&#160;SMILE is a collaborative mission between ESA and the Chinese Academy of Sciences (CAS) that was selected in November 2015, adopted into ESA&#8217;s Cosmic Vision Programme in March 2019, and is due for launch at the end of 2023. The science that SMILE will deliver, as well as the ongoing technical developments and scientific preparations, and the current status of the mission, will be presented.&#160;

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Deriving the Magnetopause Position from the Soft X‐Ray Image by Using the Tangent Fitting Approach

Cited by 32 publications

References 23 publications

Methods to derive the magnetopause from soft X-ray images by the SMILE mission

Methods to derive the magnetopause from soft X-ray images by the SMILE mission

A Lunar-based Soft X-ray Imager (LSXI) for the Earth’s magnetosphere

The SMILE mission: A novel way to explore solar-terrestrial interactions

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