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Our current knowledge of galaxy evolution is primarily based on studying stellar populations through optical observations, however complementary measurements of the gaseous component across cosmic history is crucial in order to improve our understanding of galaxy evolution. Fuelling molecular clouds and thus star formation, the amount of neutral hydrogen (HI) plays a crucial role in the life of galaxies. Not surprisingly, observing HI is one of the key science goals of the upcoming Square Kilometre Array (SKA), and its precursor telescopes. The exceptional sensitivity and resolution of these new instruments are required to observe the faint 21 cm radio line of HI beyond the local Universe. However, spectral line surveys of this unprecedented volume are raising new challenges in data reduction and storage.
In my presentation I give a brief overview of the upcoming HI surveys on SKA precursors, focusing on surveys on the Australian SKA Pathfinder (ASKAP) telescope and in particular, the Deep Investigation Of Neutral Gas Origins (DINGO) survey. Targeting selected GAMA and WAVES-deep fields, DINGO will contribute to a multi-wavelength spectroscopic data set, and enable the study of the co-evolution of stellar, baryonic and dark matter content of galaxies over the past 4 Gyr with matching resolution, sensitivity and depth. However, to enable cutting-edge science, DINGO needs to implement novel data storage and processing solutions such as gridded visibility storage, which makes DINGO one of the most promising pathfinder surveys both in science and instrumentation for future radio astronomy with the SKA.
