VLASS

VLASS (for Very Large Array Sky Survey) is a radio astronomical survey by the Very Large Array (VLA), with observations carried out from 2017 to 2026, covering 80% of the sky, the expectation being to image 5 million radio sources. This survey has the advantages of VLA upgrades installed since the VLA's previous all-sky survey, the 1990s NRAO VLA Sky Survey (NVSS). This survey's angular resolution is 2.5 arcsecond, and the frequency range is 2 to 4 GHz, and includes polarimetry. The sky was observed three times, each full-sky observation requiring 32 months, after which some additional observation was carried out to cover for some problematic observation data. Some basic data has been released, and full data, including significant processing, will be released over the next few years.