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Title: Boundary Detection in Three Dimensions With Application to the SMILE Mission: The Effect of Photon Noise
Authors: Jorgensen, AM
Sung, T
Wang, C
Dai, L
Sembay, S
Wei, F
Guo, Y
Xu, R
First Published: 22-May-2019
Publisher: American Geophysical Union (AGU), Wiley
Citation: Journal of Geophysical Research: Space Physics, 2019, 124 (6), pp. 4365-4383 (19)
Abstract: Imaging magnetospheric satellite missions provide information, which is complementary to in situ observations. Imaging is often able to provide an instantaneous picture of large‐scale structures, whereas in situ measurements, even multipoint in situ measurements, can only provide an average view of large‐scale structure. But imaging also presents some challenges. When three‐dimensional structures need to be extracted from two‐dimensional images, it is necessary to either make suitable assumptions or record a large enough number of images from different viewing geometries to allow a reconstruction (e.g., tomography). Imaging data exist over a wide range of sources including visible light, ultraviolet light, extreme ultraviolet, energetic neutral atoms, and X‐rays, each informing different physical mechanisms. In this paper we consider the extraction of the geometry of the magnetopause and the bow shock from single X‐ray images expected from the Solar wind Magnetosphere Ionosphere Link Explorer (SMILE) mission. We examine the effect of photon‐counting noise in determining the boundary geometries. We also consider the effect of different viewing geometries in the form of orbital vantage point and target look direction. Finally, we consider the effect of background noise. We find that our approach is relatively robust to viewing geometry effects and works at low count rates.
DOI Link: 10.1029/2018JA025919
ISSN: 2169-9380
eISSN: 2169-9402
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2019, American Geophysical Union (AGU), Wiley. Deposited with reference to the publisher’s open access archiving policy. (
Description: Files containing the X‐ray volume emission and magnetopause boundary location used to generate Figure 2, as well as IDL‐language code to read those files, may be downloaded from the Open Science Framework (Jorgensen, 2018) at the link
The file associated with this record is under embargo until 6 months after publication, in accordance with the publisher's self-archiving policy. The full text may be available through the publisher links provided above.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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