The Observing site: the Teide Observatory
Our CMB laboratory is placed at the Teide Observatory, run by the Instituto de Astrofisica de Canarias (IAC). The site is above much of the atmospheric water vapour with a stable dry climate. 90% of the time the data is just system noise limited.
| Altitude | 2400 m |
| Longitude | 16° 30 W |
| Latitude | 28° 17 N |
| Typical PWV | 1-3 mm |
| Transmissivity | 98% (equiv. to Tsky = 5 K) |