Simultaneous ionospheric variability on Earth and Mars

Simultaneous ionospheric variability on Earth and Mars
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地球和火星上的电离层同时变化

DOI:
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发表时间:
2003
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通讯作者:
D. Hinson
D. Hinson
中科院分区:
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文献类型:
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作者:
M. Mendillo;Steven M. Smith;J. Wroten;H. Rishbeth;D. Hinson

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[1] 电离层物理学研究地球和行星高层大气中等离子体的基本结构和变化性。比较研究促进了不同环境下的探索和综合。在本文中,我们研究了1999年3月9日至27日由火星全球勘测者卫星上的无线电科学实验所获得的火星电离层剖面观测结果,并将其日常变化与地球上的同日观测结果进行了比较。利用适用于火星上电子密度峰值层和地球上E层的光化学平衡理论,我们发现行星之间在比例定律上以及在太阳活动显著期间与同时发生的太阳通量变化的相关性细节上基本一致。我们将剩余的变化性(火星上比地球上更大)归因于观测的不确定性以及两个行星上都需要进一步研究的非太阳机制。
[1] Ionospheric physics deals with the basic structure and variability of plasma within the upper atmospheres of the Earth and planets. Comparative studies foster both exploration and synthesis within diverse settings. In this paper we examine observations of the ionospheric profiles on Mars obtained on 9–27 March 1999 by the radio science experiment onboard the Mars Global Surveyor satellite, and compare their day-to-day variability with same-day observations on Earth. Using photochemical-equilibrium arguments applicable to the peak electron density layer on Mars and the E-layer on Earth, we find basic agreement in scaling laws between the planets, and in the details of correlations with simultaneous solar flux variations during a period of pronounced solar activity. We ascribe the residual variabilities (larger on Mars than Earth) to both observational uncertainties and to nonsolar mechanisms in need of further study on both planets.