![HEP2026: 42nd Conference on Recent Developments in High Energy Physics and Cosmology [NTUA] Jul 8 – 11, 2026](/event/1654737/logo-1929213524.png){kind=logo}
Speaker
Description
The GRANDProto300 experiment is a major prototype of the Giant Radio Array for Neutrino Detection (GRAND), designed to validate the technologies and analysis methods required for large-scale radio detection of ultra-high-energy particles. Achieving nanosecond-level timing synchronization and a uniform detector response across the array is essential for accurate event reconstruction.
We present recent calibration studies performed with the current GP65 array in China. Timing calibration is based on dedicated beacon measurements and global-fit techniques, allowing the determination of relative station offsets and the validation of reconstruction performance using both fixed and roaming beacon data. In parallel, detector gain calibration is investigated through Galactic-noise observations and RF-chain monitoring, including temperature-dependent corrections and inter-station response homogenization.
The calibration studies presented here provide encouraging indications of improved timing consistency and detector response uniformity across the array. Ongoing work focuses on validating these results and quantifying their impact on air-shower reconstruction, as part of the broader effort toward the scientific goals of GRANDProto300 and future GRAND observatories.