Observations and analysis of phase scintillation of spacecraft signal on the interplanetary plasma

Observations and analysis of phase scintillation of spacecraft signal on the interplanetary plasma
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航天器信号在行星际等离子体上的相位闪烁观测与分析

DOI:
10.1051/0004-6361/201322925
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发表时间:
2014-03
期刊:
Astronomy & Astrophysics
影响因子:
--
通讯作者:
Hao, L. F.
Hao, L. F.
中科院分区:
其他
文献类型:
--
作者:
Colucci, G.;Wang, W. H.;Yang, W. J.;Hao, L. F.

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目标。2009-2013年期间,利用欧洲甚长基线干涉测量网络的一些射电望远镜在X波段(λ = 3.6厘米)观测到了欧洲空间局金星快车航天器遥测信号的相位闪烁。方法.我们发现了一个相位波动谱沿着金星轨道与一个几乎恒定的光谱指数为-2.42 +/- 0.25在整个范围内的太阳伸长角从0度到45度,这是一致的Kolmogorov湍流。对太阳系内航天器信号的射电天文学观测提供了一个独特的机会,可以研究信号通过行星际等离子体和地球电离层传播所引起的相位波动的时间行为。这提供了补充数据的经典行星际闪烁(IPS)研究的基础上观测遥远的天然射电源的通量变化。结果我们在这里介绍我们的技术和IPS的结果。我们将这些与通过太阳风的视线的总电子含量进行比较。最后,我们评估所提出的技术的相位参考VLBI和多普勒观测目前的业务和未来的空间任务的适用性。
Aims. The phase scintillation of the European Space Agency's Venus Express (VEX) spacecraft telemetry signal was observed at X-band (lambda = 3.6 cm) with a number of radio telescopes of the European Very Long Baseline Interferometry (VLBI) Network in the period 2009-2013. Methods. We found a phase fluctuation spectrum along the Venus orbit with a nearly constant spectral index of -2.42 +/- 0.25 over the full range of solar elongation angles from 0 degrees to 45 degrees, which is consistent with Kolmogorov turbulence. Radio astronomical observations of spacecraft signals within the solar system give a unique opportunity to study the temporal behaviour of the signal's phase fluctuations caused by its propagation through the interplanetary plasma and the Earth's ionosphere. This gives complementary data to the classical interplanetary scintillation (IPS) study based on observations of the flux variability of distant natural radio sources. Results. We present here our technique and the results on IPS. We compare these with the total electron content for the line of sight through the solar wind. Finally, we evaluate the applicability of the presented technique to phase-referencing VLBI and Doppler observations of currently operational and prospective space missions.
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