The Uccle Solar Equatorial Table (USET) consists of a platform supported by an equatorial mount (i.e. with an axis parallel to the rotation axis of the Earth), which allows precise continuous tracking of the Sun. The table holds four solar telescopes. One of them is used to make sunspot drawings by projection. The other three telescope are imaging the Sun at three different wavelengths using CCD cameras, to record magnetic structures and eruptive events at different altitudes in the solar atmosphere. The USET is housed in a white-painted dome about 10 meters above the ground to optimize the seeing quality. The USET is producing synoptic observations of the whole solar disk on an average of 250 days each year. The CCD images are distributed in near real-time via the USET web pages.


The USET dome on a sunny day


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