Using local correlation tracking to recover solar spectral information from a slitless spectrograph

dc.contributor.authorCourrier, Hans T.
dc.contributor.authorKankelborg, Charles C.
dc.date.accessioned2019-03-27T19:25:52Z
dc.date.available2019-03-27T19:25:52Z
dc.date.issued2018-01
dc.description.abstractThe Multi-Order Solar EUV Spectrograph (MOSES) is a sounding rocket instrument that utilizes a concave spherical diffraction rating to form simultaneous images in the diffraction orders m=0, +1, and -1. MOSES is designed to capture high-resolution cotemporal spectral and spatial information of solar features over a large two-dimensional field of view. Our goal is to estimate the Doppler shift as a function of position for every MOSES exposure. Since the instrument is designed to operate without an entrance slit, this requires disentangling overlapping spectral and spatial information in the m=±1 images. Dispersion in these images leads to a field-dependent displacement that is proportional to Doppler shift. We identify these Doppler shift-induced displacements for the single bright emission line in the instrument passband by comparing images from each spectral order. We demonstrate the use of local correlation tracking as a means to quantify these differences between a pair of cotemporal image orders. The resulting vector displacement field is interpreted as a measurement of the Doppler shift. Since three image orders are available, we generate three Doppler maps from each exposure. These may be compared to produce an error estimate.en_US
dc.description.sponsorshipNASA Heliophysics Sounding Rocket Program, Grant No. NNX14AK71Gen_US
dc.identifier.citationCourrier, Hans T., and Charles C. Kankelborg. "Using local correlation tracking to recover solar spectral information from a slitless spectrograph." 4, no. 1 (January 2018). DOI:10.1117/1.JATIS.4.1.018001.en_US
dc.identifier.issn2329-4124
dc.identifier.urihttps://scholarworks.montana.edu/handle/1/15350
dc.language.isoenen_US
dc.rightsCC BY: This license lets you distribute, remix, tweak, and build upon this work, even commercially, as long as you credit the original creator for this work. This is the most accommodating of licenses offered. Recommended for maximum dissemination and useen_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/legalcodeen_US
dc.titleUsing local correlation tracking to recover solar spectral information from a slitless spectrographen_US
dc.typeArticleen_US
mus.citation.issue1en_US
mus.citation.journaltitleJournal of Astronomical Telescopes, Instruments, and Systemsen_US
mus.citation.volume4en_US
mus.data.thumbpage9en_US
mus.identifier.categoryPhysics & Mathematicsen_US
mus.identifier.doi10.1117/1.JATIS.4.1.018001en_US
mus.relation.collegeCollege of Letters & Scienceen_US
mus.relation.departmentPhysics.en_US
mus.relation.universityMontana State University - Bozemanen_US

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