The Committee on Radio Astronomy Frequencies (CRAF) is a committee of
the European Science Foundation (ESF).
Some details of the Robledo radio observatory (operated by NASA/INTA):
| geographic longitude: | -04o 14'57" |
| geographic latitude: | 40o 25'38" |
| altitude above sea level: | 761 meter |
| diameter telescope 1: | 64 meter |
| diameter telescope 2: | 34 meter |
| minimum elevation: 6o |
Available observing mode: single dish, Very Long Baseline Interferometry (VLBI).
Frequencies used currently:
| Frequency band | Observing mode |
| 1610.6 - 1613.8 MHz | single dish, VLBI |
| 1660.0 - 1670.0 MHz | single dish, VLBI |
| 1718.8 - 1722.2 MHz | single dish |
| 2215 - 2240 MHz | VLBI |
| 2290 - 2300 MHz | VLBI |
| 8208 - 8313 MHz | VLBI |
| 8387 - 8443 MHz | VLBI |
| 8498 - 8573 MHz | VLBI |
| 18 - 26 GHz | single dish |
| 22.01 - 22.21 GHz | single dish |
| 22.21 - 22.50 GHz | single dish, VLBI |
| 22.81 - 22.86 GHz | single dish |
| 23.07 - 23.12 GHz | single dish |
| 23.60 - 24.0 GHz | single dish |
Research programs: solar radio astronomy, monitoring of active galactic nuclei, geodetic VLBI.