Ministry of Science, Innovation and Universities

Yebes Observatory (YEBES)

The Yebes Astronomical Centre (National Geographic Institute, Ministry of Development) is devoted to the development and construction of instrumentation in the field of radio astronomy, as well as astronomical observations that are of astronomical as well as geodetic or geophysical interest. Located at an altitude of 930 m, about 80 km from Madrid in the municipal area of Yebes (Guadalajara).

Its three geodetic technologies (radio astronomy (VLBI), gravimetry, and permanent GNSS station), make the Yebes Observatory the fundamental geodetic station in Spain. Furthermore, the Observatory fits very well into an international context. The 40m radio telescope is one of the most important nodes of the EVN, one of the largest scientific facilities in the world, and is a station of the IVS for Geodetics and Astrometry. For its part, the RAEGE network is one of the most important components of the GGOS. The gravimetry station, designed to carry out comparisons and calibrations of other exterior gravimetres, forms part of the IGRS

Main Characteristics

The Centre hosts four main scientific-technological facilities: (i) a large radio telescope measuring 40 m in diameter; (ii) a radio telescope measuring 13.2 m of the RAEGE network (Atlantic Spanish-Portuguese Network of Geodynamic and Astronomical Stations, composed of 4 radio telescopes of this type locate in Yebes (1), the Canary Islands (1), and the Azores (2)) along with the central headquarters of this network; (iii) an anechoic chamber capable of operating at very high frequencies; (iv) a pavilion of relative (superconductor) and absolute gravimetry.

The Centre also features a very well-equipped laboratory for the development of state-ofthe- art ultra-sensitive amplifiers of very low radio frequency noise, as well as laboratories and workshops for the design and construction of cryogenic receivers for radio astronomy.

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