Geophysical effects upon magnetospheric images

Daniel L. Murphy; Yam T. Chiu

doi:10.1117/12.147632

7 July 1993 Geophysical effects upon magnetospheric images

Daniel L. Murphy, Yam T. Chiu

Proceedings Volume 2008, Instrumentation for Magnetospheric Imagery II; (1993) https://doi.org/10.1117/12.147632
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

The concept of using solar EUV line resonance scattering to image ion populations in the magnetosphere has been studied extensively in the last decade. Global magnetospheric EUV images can display the effects of scatterer density, injection, the geomagnetic field, and the changing perspective of earthshine source intensity with altitude, latitude, and local time. Successful use of these images for magnetospheric plasma diagnostics or for examining the morphology of the magnetosphere will depend upon properly accounting for these effects and incorporating them into the models used to interpret such images. The importance of each of these effects is examined for varying levels of magnetospheric activity and different observer perspectives. This work utilizes oxygen 834 angstroms resonance scattering as a testbed for this examination. A Tsyganenko 1987 magnetospheric model is employed to study the effects of different levels of magnetospheric activity. The resonance scattering formulation employed assumes an optically thin magnetospheric medium, with full inclusion of Doppler shift effects, for 834 angstroms radiation; Monte Carlo techniques are used for the construction of simulated magnetospheric images.

Citation Download Citation

Daniel L. Murphy and Yam T. Chiu "Geophysical effects upon magnetospheric images", Proc. SPIE 2008, Instrumentation for Magnetospheric Imagery II, (7 July 1993); https://doi.org/10.1117/12.147632

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