Accession Number:

ADA621546

Title:

Magnetospheric Control of Density and Composition in the Polar Ionosphere

Descriptive Note:

Final rept. Apr 2012-Mar 2015

Corporate Author:

BOSTON UNIV MA

Personal Author(s):

Report Date:

2015-06-24

Pagination or Media Count:

16.0

Abstract:

This research has used collaborative observations by UHF incoherent scatter radar ISR, the SuperDARN HF radar network, and wide-angle monochromatic optical imagers, supported by first-principles numerical modeling, to investigate the structure and composition of Earths polar ionosphere. Key observational evidence has been provided by the electronically steerable Incoherent Scatter Radar at Resolute Bay, Canada. Findings include technical contributions related to the application of phased array ISR in the deep polar cap, as well as scientific contributions arising from the application of these techniques 1 Development of a sensor fusion framework for combining simultaneous observations of auroral phenomena observed by radar and optical means Semeter and Zettergren, 2014, 2 Development of a deconvolution approach for analyzing volumetric ISR measurements in a temporally and spatially varying ionosphere Swoboda et al., 2015, 3 Discovery of direct evidence for internal structuring of convecting plasma patches Dahlgren et al., 2013, 4 Quantitative description of electrodynamic coupling within polar auroral arcs developing along the nightside polar cap boundary Perry et al., 2015, 5 Steepening of ionospheric density gradients via magnetosphere-ionosphere coupling at the poleward auroral boundary, and 6 Measurements of anomalous ion heating by Langmuir turbulence caused be soft particle fluxes in the aurora -- a possible hidden energy source for F-region energy balance at high latitudes Akbari et al., 2014, 2015.

Subject Categories:

  • Atmospheric Physics
  • Active and Passive Radar Detection and Equipment
  • Plasma Physics and Magnetohydrodynamics
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE