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PRECL: A new method for interferometry imaging from closure phase

机译:PRECL:一种从封闭阶段开始进行干涉成像的新方法

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摘要

For short-wavelength VLBI observations, it is difficult to measure the phase of the visibility function accurately. The closure phases are reliable measurements under this situation, though it is not sufficient to retrieve all of the phase information. We propose a new method, phase retrieval from closure phase (PRECL). PRECL estimates all the visibility phases only from the closure phases. Combining PRECL with a sparse modeling method we have already proposed, the imaging process of VLBI does not rely on a dirty image or self-calibration. The proposed method is tested numerically and the results are promising.
机译:对于短波VLBI观测,很难准确测量可见度函数的相位。在这种情况下,关闭阶段是可靠的度量,尽管不足以检索所有阶段信息。我们提出了一种新方法,即从封闭阶段检索阶段(PRECL)。 PRECL仅从关闭阶段估算所有可见性阶段。结合我们已经提出的PRECL和稀疏建模方法,VLBI的成像过程不依赖于脏图像或自校准。对该方法进行了数值测试,结果令人满意。

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