Proceedings of Science 395, 1146 (2022). doi:10.22323/1.395.1146 special issue: "37th International Cosmic Ray Conference : ICRC2021 : 12-23 July 2021 : Berlin, Germany-Online / Editorial Board: Alexander Kappes, Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany ; Bianca Keilhauer, Karlsruhe Institute of Technology, Institute for Astroparticle Physics (IAP)" 37. International Cosmic Ray Conference, ICRC 2021, Berlin, Germany, 2021-07-15-2021-07-22