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Thermal ion imagers...
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Knudsen, D. J.Univ Calgary, Dept Phys & Astron, Calgary, AB, Canada
(author)
Thermal ion imagers and Langmuir probes in the Swarm electric field instruments
- Article/chapterEnglish2017
Publisher, publication year, extent ...
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AMER GEOPHYSICAL UNION,2017
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electronicrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:uu-359803
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-359803URI
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https://doi.org/10.1002/2016JA022571DOI
Supplementary language notes
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Language:English
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Summary in:English
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Classification
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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The European Space Agency's three Swarm satellites were launched on 22 November 2013 into nearly polar, circular orbits, eventually reaching altitudes of 460 km (Swarm A and C) and 510 km (Swarm B). Swarm's multiyear mission is to make precision, multipoint measurements of low-frequency magnetic and electric fields in Earth's ionosphere for the purpose of characterizing magnetic fields generated both inside and external to the Earth, along with the electric fields and other plasma parameters associated with electric current systems in the ionosphere and magnetosphere. Electric fields perpendicular to the magnetic field.B are determined through ion drift velocity v(i) and magnetic field measurements via the relation.E. = -.vi x.B. Ion drift is derived from two-dimensional images of low-energy ion distribution functions provided by two Thermal Ion Imager (TII) sensors viewing in the horizontal and vertical planes;v(i) is corrected for spacecraft potential as determined by two Langmuir probes (LPs) which also measure plasma density ne and electron temperature T-e. The TII sensors use a microchannel-plate-intensified phosphor screen imaged by a charge-coupled device to generate high-resolution distribution images (66 x 40 pixels) at a rate of 16 s(-1). Images are partially processed on board and further on the ground to generate calibrated data products at a rate of 2 s(-1); these include.vi,.E., and ion temperature T-i in addition to electron temperature Te and plasma density n(e) from the LPs.
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Added entries (persons, corporate bodies, meetings, titles ...)
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Burchill, J. K.Univ Calgary, Dept Phys & Astron, Calgary, AB, Canada
(author)
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Buchert, StephanUppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen(Swepub:uu)stbuc254
(author)
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Eriksson, AndersUppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen(Swepub:uu)andeerik
(author)
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Gill, ReineUppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen(Swepub:uu)rgi12152
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Wahlund, Jan-ErikUppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen(Swepub:uu)janewahl
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Åhlén, LennartUppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen(Swepub:uu)lennahl
(author)
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Smith, M.COM DEV Int, Cambridge, ON, Canada
(author)
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Moffat, B.Univ Waterloo, Ctr Educ Math & Comp, Waterloo, ON, Canada;COM DEV Int, Cambridge, ON, Canada
(author)
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Univ Calgary, Dept Phys & Astron, Calgary, AB, CanadaInstitutet för rymdfysik, Uppsalaavdelningen
(creator_code:org_t)
Related titles
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In:Journal of Geophysical Research - Space Physics: AMER GEOPHYSICAL UNION122:2, s. 2655-26732169-93802169-9402
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