| Autor: |
Goldstein, J., Chappell, C. R., Davis, M. W., Denton, M. H., Denton, R. E., Gallagher, D. L., Gladstone, G. R., Lecocke, M. B., Sandel, B. R., Windt, D. L. |
| Zdroj: |
Journal of Geophysical Research. Space Physics; Mar2018, Vol. 123 Issue 3, p2078-2103, 26p |
| Abstrakt: |
Abstract: This paper investigates the potential for 83.4 nm imaging of the plasmaspheric dense oxygen torus, using simple models for core plasma density and composition to constrain a simulated image code. We derive the requirements for plasmaspheric O+ imaging, and the expected performance of an imager based on a slightly modified version of the IMAGE extreme ultraviolet camera. We find that such an imager can achieve a sensitivity of 0.69(s R pixel)−1, sufficient to capture the dense torus 83.4 nm signal with 25 min integration time. The background rejection ratios for this design are 1.5 × 10−4 at 58.4 nm and 7.4 × 10−8 for Lyman‐α. We discuss the effects of ion temperature and motion, and O++ glow. We compute simulated O+ images of the formation and global distribution of the dense torus. We also examine the possibility of direct observation of oxygen outflow from the ionosphere. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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