We are investigating a new approach to modelling uncertainties in individual pixels of Very Long Baseline Interferometry (VLBI) intensity (Stokes I, Q, U) images. Comparison of distributions of our calculated uncertainties for model sources with the results of Monte Carlo simulations shows that our method correctly reproduces the overall level and pattern of uncertainties in intensity images for model sources that are not too compact. Refinement of the approach to better reproduce uncertainties in compact sources is being studied. This new approach should ultimately provide a means to correctly estimate pixel-based uncertainties in the Stokes parameters I, Q and U, including the effect of correlations between values in different pixels.

翻译：我们正在研究一种新的方法来模拟非常长基线干涉测量(VLBI)强度(Stokes I, Q, U)的单个像素的不确定因素(Stokes I, Q, U),将我们计算出的模型来源不确定因素的分布与Monte Carlo模拟结果的比较表明,我们的方法正确地复制了模型来源不太紧凑的密度图像中不确定因素的总体水平和模式。正在研究如何改进在紧凑来源中更好地复制不确定因素的方法。这一新的方法最终应该提供一种手段,正确估计斯托克斯参数I,Q和U中基于像素的不确定因素,包括不同像素值之间相互关系的影响。