BEGIN:VCALENDAR VERSION:2.0 CALSCALE:GREGORIAN PRODID:UW-Madison-Physics-Events BEGIN:VEVENT SEQUENCE:0 UID:UW-Physics-Event-6429 DTSTART:20210426T170000Z DURATION:PT1H0M0S DTSTAMP:20260414T234008Z LAST-MODIFIED:20210421T115447Z LOCATION:Zoom Meeting SUMMARY:Auroral Reconstruction CubeSwarm – ARCS: a Heliophysics miss ion concept for decoding the aurora \, Plasma Physics (Physics/ECE/NE 922) Seminar\, K A Lynch\, Dartmouth College Physics and Astronomy\, f or the ARCS team DESCRIPTION: The ARCS mission goal is decode the aurora by explorin g the relationship between the visible aurora and distributed currents and flow fields\, to unlock critical physics of the auroral ionospher e at mesoscales. The ARCS swarm produces low-resource observations fo r system science enabling progress toward the “Diversified and Distr ibuted Sensor Deployment Strategy” envisioned in the NAS Decadal App endix C. 32 satellites in 8 planes with repeat ground tracks will cro ss over 32 groundbased observatory sites in Alaska. The orbits are su n-synchronous at 561 km altitude and 97 degree inclination. The 32 GB O sites contain filtered imagery for the creation of maps of precipita tion average energy and energy flux\; they also contain transmitters for a local TEC network\, to work with receivers on the spacecraft.
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\n ARCS generates novel\, high fidelity\, two-dimensional electric and magnetic field maps from an in situ CubeSwarm in concert with dense ionospheric tomography and ground-based multispectral auror al imaging. The final link in the fundamental global magnetic convecti on cycle is reflected in\, and possibly governed by\, these fields and associated aurora. Mesoscale flows\, currents\, and auroral structure s represent significant ionospheric energy inputs at auroral latitudes \, creating a variety of geophysically important responses and space w eather impacts. These are fundamental processes occurring at magnetize d planets and moons with ionospheres.
\n ARCS is a next-generat ion mission consisting of the first-ever swarm of NASA science-grade C ubeSats coupled with a dense grid of custom\, ground-based observatori es. The ARCS science objectives are: (1) map the 2D mesoscale struct ure and temporal evolution of plasma flows and currents in the auroral iononosphere\; (2) determine how these 2D maps of plasma flows and c urrents self-consistently evolve in conjunction with auroral ionospher ic density responses\; (3) determine the roles of the physical mechan isms regulating the relationships between the flows\, currents\, auror al forms and precipitation in the auroral ionospheric system.
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