Low-Latitude Ionospheric Plasma Depletions: Imaging, Modeling, and Interpretation Using Space-Based Ultraviolet Measurements

Details Low-Latitude Ionospheric Plasma Depletions: Imaging, Modeling, and Interpretation Using Space-Based Ultraviolet Measurements Low-Latitude Ionospheric Plasma Depletions: Imaging, Modeling, and Interpretation Using Space-Based Ultraviolet Measurements

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsa41b0435c&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #SA41B-0435

Physics

2415 Equatorial Ionosphere, 2439 Ionospheric Irregularities, 2447 Modeling And Forecasting, 2494 Instruments And Techniques, 6982 Tomography And Imaging

Scientific paper

Modeling and characterization of ionospheric structures and dynamics are important issues in space weather research. Recently the Global Ultraviolet Imager (GUVI) on-board the Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) satellite has detected far ultraviolet (FUV) images of plasma depletions in the low latitude and equatorial ionosphere. A model of GUVI observation geometry was developed to simulate radiance observations of a model ionosphere. The model has been refined to incorporate geomagnetic coordinates and to allow plasma depletions to be aligned with magnetic field lines. We report on new results in reconstructing multi-dimensional electron density profiles from GUVI brightness measurements through the use of statistical inversion techniques and modeling studies. These results include three-dimensional images of field-aligned depletion structures. Case studies and comparisons with overlapping data sets are presented as a means of validation of these results.

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