PI	Victor Estelles
Operators:	Monica Campanelli, Henri Diemoz
Participant	University of Valencia

The PREDE POM-01 is an automatic ground based radiometer measuring sun direct and sky diffuse radiance with a 1.0º field of view limiting tube at 7 channels (315, 443, 500, 675, 870, 940 and 1020 nm). The optical head is pointed at the sun continuously, acquiring direct sun readings every minute, and sky diffuse radiance measurements in the almucantar and principal solar planes every 10-20 minutes.

This radiometer is the standard instrument of the international SKYNET and ESR networks (http://euroskyrad.net). The measurements are automatically sent to the International Data Center in Japan, where in turn are processed with the SKYRAD inversion code to retrieve aerosol columnar properties such as aerosol optical depth, Angström exponent, volume distributions, single scattering albedo, refractive index, and phase function.