Correlation between DMSP Particle Data and Polar Image Intensities

Details Correlation between DMSP Particle Data and Polar Image Intensities Correlation between DMSP Particle Data and Polar Image Intensities

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsm41b0577c&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #SM41B-0577

Other

0358 Thermosphere: Energy Deposition, 2407 Auroral Ionosphere (2704), 2455 Particle Precipitation, 2704 Auroral Phenomena (2407), 2716 Energetic Particles, Precipitating

Scientific paper

Precipitating particle data from the DMSP F12 and F13 satellites has been merged with image intensities from the Ultraviolet Imager (UVI) and Earth Camera (EC) on the Polar satellite. Particle data were averaged within an image accumulation time and matched with the image intensity along the corresponding segment of the DMSP trajectory in magnetic local time coordinates. The particle data and image intensity data of many hundreds of such matches were then correlated with a simple linear fit. The image intensities have the best correlation with precipitating electron energy, and the intensities correlate less well with other particle data such as the precipitating proton data, at least when considering the overall polar region. Similar correlations can be performed to detail energy input into a specific region of interest, such as the dawn or dusk side of the oval, or the equatorward or poleward side. The good correlation between the precipitating particles and the image intensities suggests that imagers can be directly calibrated to measure energy input without the additional complication of modeling the intensities based on hypothetical particle fluxes. In this way, a map of global energy input into the aurora may be derived based wholly on measurements

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