论文标题
关于mingantu光谱放射光仪的非链球基线效应的研究
A Study on Non-coplanar Baseline Effects for Mingantu Spectral Radioheliograph
论文作者
论文摘要
作为专用的太阳能电报仪，Mingantu光谱放射光仪（Muser）的最大基线超过3000米，频率范围为400 MHz -15 GHz。根据经典的无线电干涉学理论，将考虑并为这种无线电仪器校准非链球基线效应（即W-Term效应）。但是，以前几乎没有文献对太阳能电视仪的W-时间效应进行了定性或定量分析。这项研究提出了对Muser的W-时间效应的完整定量分析。在简要介绍了Muser之后，我们系统地研究了一年内的基线变化，并分析了W-期限的相应变化。我们进一步研究了W-学期在指定扩展源的成像中的影响，即太阳。我们讨论了W-期限的可能影响，例如图像失真等。模拟的结果表明，对于具有高空间分辨率的太阳能成像，W-期限是一个必不可少且不可避免的问题。
As a dedicated solar radioheliograph, the MingantU SpEctral RadioHeliograph (MUSER) has a maximum baseline of more than 3000 meters and a frequency range of 400 MHz -- 15 GHz. According to the classical radio interferometry theory, the non-coplanar baseline effect (i.e., w-term effect) would be considered and calibrated for such a radio instrument. However, little previous literature made the qualitative or quantitative analyses on w-term effects of solar radioheliograph in-depth. This study proposes a complete quantitative analysis of w-term effects for the MUSER. After a brief introduction of the MUSER, we systematically investigate the baseline variations over a year and analyze the corresponding variations of w-term. We further studied the effects of the w-term in the imaging for the specified extended source, i.e., the Sun. We discussed the possible effects of the w-term, such as image distortion and so on. The simulated results show that the w-term is an essential and unavoidable issue for solar radio imaging with high spatial resolution.
