Derivation of Auroral Energy and Energy Flux using Simultaneous Multispectral Imaging.
Abstract
A method for deriving energy and energy flux of precipitating electrons during geomagnetically disturbed times based on ground-based, simultaneous, multispectral imaging of OI (557.7 nm), OI (630.0 nm), OI (777.4 nm) and N2+ (427.8 nm) emission features is presented. The High Throughput and Multi-slit Imaging Spectrograph (HiT&MIS) is a ground-based instrument with a field of view of 0.1° × 50°, that is capable of simultaneously imaging the four specified emission features at high temporal (about 2 minutes) and spectral (about 0.02 nm) resolution. The instrument can operate on a round-the-clock basis, including under fully sunlit conditions and these capabilities allow for continuous measurements. Utilizing an electron transport and chemical reaction model (GLOW), the expected brightnesses are estimated for the four above-mentioned emission features at different input energies and energy fluxes. The electron energies and energy fluxes for the June 22, 2015 storm observed above Lowell, MA were derived by constraining the model using simultaneous measurements of the four specified emission features. This approach will thus serve as a way for multispectral imagers like HiT&MIS to be used as a stand-alone tool to derive characteristics of auroral electrons.This work was supported by NSF Grant AGS-1145166, ONR grant N00014-13-1-0266 and internal UMass Lowell funds.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2016
- Bibcode:
- 2016AGUFMSA21A2360A
- Keywords:
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- 2499 General or miscellaneous;
- IONOSPHEREDE: 7999 General or miscellaneous;
- SPACE WEATHER