The Izaña Astronomical Observatory (Tenerife – Canary Islands) is one of the most privileged places on our planet for observing the sky. Together with the Roque de los Muchachos Observatory in La Palma, it forms the Canary Islands Astrophysical Observatory.

In this exceptional location — known for having one of the darkest and driest skies — we carry out the calibration of all the photometers we manufacture.

Measurements are taken over a period of 60 days on the same platform, alongside reference photometers («mother» photometers) that provide correction values. All data from each photometer is collected. A photometer is only considered calibrated when its calibration curve shows a value of 1 or one extremely close to it.

In this way, all our photometers deliver consistent magnitude readings, which allows them to operate as a network, monitoring skies from any location.

The Izaña Observatory has a constant sky brightness of 21.6 mag/arcsec².

This calibration method is patented. Without it, the sensor measurements would be completely inaccurate and scientifically worthless.