Geospace imaging using Thomson scattering

Details Geospace imaging using Thomson scattering Geospace imaging using Thomson scattering

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jastp..71..132m&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 71, Issue 1, p. 132-142.

Physics

1

Geospace Imaging, Magnetosphere, Ionosphere, Plasmasphere, Thomson Scattering

Scientific paper

We evaluate the potential of imaging for the first time, the near-earth space plasma environment seamlessly from the ionosphere through the magnetosphere by remotely sensing Thomson scattering of solar visible light by geospace electrons. Using state of the art first principles models of the magnetosphere/ionosphere system, we show that the column emission rates are weak, generally less than 10 Rayleighs, but detectable with currently available instrument technology recently deployed for heliospheric imaging. We demonstrate that distinct features such as the bow shock, magnetosheath and magnetopause are detectable in synthetic images simulated using modified solar coronagraphs and white light imagers, providing that the large background signals are properly quantified. The availability of global geospace images of the electron concentration will enable major advances in our understanding of how Earth's near-space environment responds as a coupled system to changing solar forcings. Such images are expected to play a central role in space weather assessment and forecasting, from which significant capabilities will accrue, much as the imaging of the Earth's surface and lower atmosphere has advanced understanding and forecasting of tropospheric weather.

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