The measurements of Tunka-133 are also used for cross-calibration and comparison of the newer detectors. Tunka-Rex Starting with 18 antennas in 2012 Tunka-Rex was successively increased and now consists of 63 antenna stations distributed over the whole area of Tunka-133. By comparison to Tunka-133 it was shown that the radio measurements have the same accuracy for the cosmic-ray energy than the Cherenkov-light measurements. While these Cherenkov-light measurements are possible only during dark and clear nights, the radio measurements are done at any time of the day, which now significantly enhances the duty cycle of the experiment. Tunka-Grande Tunka-Grande consists of 19 scintillation stations with an area of 10 m² each from the closed KASCADE-Grande array. These stations measure the particles of the air showers at ground, in particular electrons and muons. All stations are installed in the area of Tunka-133. They are operated simultaneously with the radio antennas of Tunka-Rex, since the combination of both measurement techniques is expected to enhance the accuracy for the composition of the cosmic rays. Tunka-HiSCORE Tunka-HiSCORE uses the same detection principle as Tunka-133, but features more sensitive and accurate detectors. Especially the superior timing precision increases the angular resolution for the detected air showers. This is crucial for the scientific goal of HiSCORE, which is to identify sources high-energy gamma rays. First prototype stations of HiSCORE were installed in 2012, and since 2014 the arrays consists of 29 stations covering an area of 0,3 km². A further extension is planned for 2017. Tunka-IACT Tunka-IACT will consist of several Imaging Air Cherenkov Telescopes using the same principle as MAGIC, H.E.S.S, VERITAS and CTA. The combination with HiSCORE enables a higher maximum energy for the observed gamma rays than with conventional imaging air cherenkov telescopes. As of 2016 the construction of the first telescope is nearly completed. External links TAIGA Homepage of the Tunka-133 experiment Tunka-Rex Helmholtz-Russia Joint Research Group (HRJRG-303) Press release HRJRG Cosmic-ray experiments High energy particle telescopes