Status, results and plans after 3 years of Tunka-Rex operation

The Tunka Radio Extension (Tunka-Rex) is a radio detector for air showers from cosmic rays around 10¹⁷ eV close to Lake Baikal in Russia. It currently consists of 44 antenna stations, distributed over 3 km², and will be extended by another 19 antenna stations this year. As most radio experiments, it is hosted by another air-showers detector, providing trigger and an independed reconstruction. This has been Tunka-133, an air-Cherenkov detector at the site, limited to operation during moonless nights. From winter 2015 on, Tunka-Rex also jointly operates with Tunka-Grande, a newly installed scintillator detector at the site, capable of 24 h operation. The goal of the first stage of Tunka-Rex was to develop methods for competitive air shower measurements and detemine the achievable precision for the most important air shower parameters, the energy and depth of the shower maximum. In the next stage, with the now available full duty cycle and powerful combination of radio and scintillator detector, the goal will be to contribute to measurements of the energy spectrum and mass composition of cosmic rays from 10¹⁷ eV to 10¹⁸ eV. Latest results and plans for Tunka-Rex are reported. This includes an energy reconstruction with a single antenna station and the comparison of the absolute energy scale via radio measurements.