The Yebes radio observatory (operated by the IGN Osservatorio Astronómico Nacional) operates 2 radio telescopes, one with an antenna diameter of 40m and another with 13.2m. The 40m antenna can operate in frequency bands 1- 116 GHz and is used for Very Long Baseline Interferometry (VLBI) and single dish observations. The 14m telescope operates in the S and X bands and participates in the Project RAEGE as part of the developments underway for a VLBI Geodetic Observing System, VGOS.

Telescope 1:

geographic longitude:	– 03° 05′ 13″
geographic latitude:	40° 31′ 28.8″
altitude above sea level:	980 m
diameter of telescope:	40 m
minimum elevation:	5°

Available observing mode: EVN VLBI, single dish, spectroscopy

Telescope 2:

geographic longitude:	– 03° 05′ 18.7″
geographic latitude:	40° 31′ 24.5″
altitude above sea level:	978 m
diameter of telescope:	13.2 m
minimum elevation:	5°

Available observing mode: IVS VGOS (VLBI Global Observing System)

Frequencies used currently:

Frequency band	Observing mode
2 – 15 GHz	13m single dish, VLBI
2200 – 2370 MHz	40m single dish, VLBI
3000.4 – 3512.4 MHz	13m IVS VGOS
3220 – 3390 MHz	40m single dish, VLBI
4 – 18 GHz	40m single dish, VLBI
4500 – 9000 MHz	40 single dish, VLBI
5240.4 – 5752.4 MHz	13m IVS VGOS
6360.4 – 6872.4 MHz	13m IVS VGOS
4800 – 6700 MHz	40m single dish, VLBI
8100 – 8900 MHz	40m single dish, VLBI
10.20004 – 10.7124 GHz	13m IVS VGOS
18 – 32 GHz	40m single dish, VLBI
21 – 25 GHz	40m single dish, VLBI
28 – 33 GHz	VLBI
31.5 – 50 GHz	40m single dish, VLBI, in prep.
72 – 90.5 GHz	40m single dish, VLBI
83 – 116 GHz	40m single dish, VLBI

Research programs: mm-wave spectroscopy of interstellar and circumstellar matter, Very Long Baseline Interferometry, IVS VGOS.