The Spectr-W3 project is the collaboration between the Russian Federal Nuclear Centre All-Russian Institute of Technical Physics (RFNC VNIITF) and the Joint Institute for High Temperatures of the Russian Academy of Sciences (JIHT RAS). The information accumulated in the Spectr-W3 atomic database contains over 450000 records and includes experimental and theoretical data on ionization potentials, energy levels, wavelengths, radiation transition probabilities, oscillator strengths, and (optionally) parameters providing analytical approximations for electron-collisional cross-sections and rates for atoms and ions. At the present time, Spectr-W3 is the largest available database providing information on the spectral properties of multicharged ions.

References:
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2. I.Yu. Skobelev, P.A. Loboda, A.Ya. Faenov, et al. J. of Phys. Conf. Ser. vol. 653, 012022 (2015).