Context. Very long baseline interferometry (VLBI) is a radio-astronomical technique whereby the correlated signal from various baselines combined into an image of highest possible angular resolution. Due to sparsity measurements, this imaging procedure constitutes ill-posed inverse problem. For decades, CLEAN algorithm has been standard choice in VLBI studies, despite it bringing on some seriou...

investigation and monitoring of the displacement field derived from deformation is among the important studies in earth science and geophysics topics, which plays a main role in the prevention and praxeology of natural disasters such as earthquake, subsidence, land slide et cetera. here we can mention the several methods in geodetic measurement and deformation monitoring such as spirit leveling...