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PEPSI during daytime: disk-unresolved solar light is fed to the spectrograph from a small Sun-as-a-star telescope. The upgrade SDI-POL will feed polarised light via two fibers to the spectrograph.
The Observatory for Solar Radioastronomy (OSRA) at Tremsdorf was operated by AIP from 1954 - 2007. Observational data and event lists are still available through the OSRA Data Archive.