Izaña:
- 3 permanent AERONET reference instruments
- Calibration Facility
- Roof platform with capacity for 20 cimel photometers
- GAW-PFR reference photometer for traceability to the WRC
- Testbed facility for remote sensing and water vapor (link)
Valladolid:
- 5 reference instruments (or masters) for intercalibration of field instruments.
- Calibration Facility
- Roof platform with capacity for 16 Cimel photometers
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- Radiometric Laboratory
- CAELIS software and database (www.caelis.uva.es) that supports data analysis and quality control in real time.