ESR/SKYNET Data Center
ESR is a volunteer European observational network of Prede POM sun sky radiometers coordinated with SKYNET in Asia and established and maintained by several universities and research institutes. ESR is also a "multi-instrumental" network, as radiometers other than Prede POM (such as Cimel CE318 or others) can also take part in it. In this sense, the ESR network will involve independent instruments that do not belong to other international networks. The ESR network is aimed at providing a methodology for the measurement, calibration and data processing of sun and sky photometric data for atmospheric aerosol characterization. The core of the system is the open source Skyrad.pack inversion algorithm developed by SKYNET, and completed by ESR with a series of tools for its application to other instruments.