PINGU: a vision for neutrino and particle physics at the South Pole - Aartsen, M. G.; Abraham, K.; Ansseau, I.; Glusenkamp, T.; Goldschmidt, A.; Golup, G.; Gonzalez, J. G.; Grant, D.; Griffith, Z.; Haack, Christian; Haj Ismail, A.; Hallgren, A.; et al. (Journal of Physics G: Nuclear and Particle Physics, 2017)