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- 한국우주과학회 Journal of Astronomy and Space Sciences Journal of Astronomy and Space Sciences 제37권 제1호
- 발행연도
- 2020.1
- 수록면
- 29 - 34 (6page)
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On 21 August 2017, during 16:49 UT and 20:02 UT period, a total solar eclipse started. The totality shadow occurred over the United States in time between ~17:15 UT and ~18:47 UT. When the solar radiation is blocked by the moon, observations of the ionospheric parameters will be important in the space weather community. Fortunately, during this eclipse, two Swarm satellites (A and C) flied at about 445 km through lunar penumbra at local noon of United States in the upper ionosphere. In this work, we investigate the effect of the solar eclipse on electron density, slant total electron content (STEC) and electron temperature using data from Swarm mission over United States. We use calibrated measurements of plasma density and electron temperature. Our results indicate that: (1) the electron density and STEC have a significant depletion associated with the eclipse; which could be due to dominance of dissociative recombination over photoionization caused by the reduction of ionizing extreme ultraviolet (EUV) radiation during the eclipse time (2) the electron temperature decreases, compared with a reference day, by up to ~150 K; which could be due to the decrease in photoelectron heating from reduced photoionization.
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참고문헌 (30)
참고문헌 신청
Mardina Abdullah / 2009 / Improving Ambiguity Resolution Rate with an Accurate Ionospheric Differential Correction / Journal of Navigation 62(1):151~166
E.L Afraimovich / 2002 / Effects of the August 11, 1999 total solar eclipse as deduced from total electron content measurements at the GPS network / Journal of Atmospheric and Solar-Terrestrial Physics 64(18):1933~1941
E. L. Afraimovich / 1998 / Ionospheric effects of the solar eclipse of March 9, 1997, as deduced from GPS data / Geophysical Research Letters 25(4):465~468
R.A. Bamford / 2001 / The effect of the 1999 total solar eclipse on the ionosphere / Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science 26(5):373~377
Iurii Cherniak / 2018 / Ionospheric Total Electron Content Response to the Great American Solar Eclipse of 21 August 2017 / Geophysical Research Letters 45(3):1199~1208
E.L Afraimovich / 2002 / Effects of the August 11, 1999 total solar eclipse as deduced from total electron content measurements at the GPS network / Journal of Atmospheric and Solar-Terrestrial Physics 64(18):1933~1941
E. L. Afraimovich / 1998 / Ionospheric effects of the solar eclipse of March 9, 1997, as deduced from GPS data / Geophysical Research Letters 25(4):465~468
R.A. Bamford / 2001 / The effect of the 1999 total solar eclipse on the ionosphere / Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science 26(5):373~377
Iurii Cherniak / 2018 / Ionospheric Total Electron Content Response to the Great American Solar Eclipse of 21 August 2017 / Geophysical Research Letters 45(3):1199~1208
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