  Tunka-Rex (Tunka Radio Extension) was a detector for ultra-high energy cosmic
rays measuring radio emission for air showers in the frequency band of 30-80
MHz, operating in 2010s. It provided an experimental proof that sparse radio
arrays can be a cost-effective technique to measure the depth of shower maximum
with resolutions competitive to optical detectors. After the decommissioning of
Tunka-Rex, as last phase of its lifecycle and following the FAIR (Findability -
Accessibility - Interoperability - Reuse) principles, we publish the data and
software under free licenses in the frame of the TRVO (Tunka-Rex Virtual
Observatory), which is hosted at KIT under the partnership with the KCDC and
GRADLCI projects. We present the main features of TRVO, its interface and give
an overview of projects, which benefit from its open software and data.
