CERBERUS: autonomous legged and aerial robotic exploration in the tunnel and urban circuits of the DARPA Subterranean Challenge by Tranzatto, M, Mascarich, F, Bernreiter, L, Godinho, C, Camurri, M, Khattak, S, Dang, T, Reijgwart, V, Löje, J, Wisth, D, Zimmermann, S, Nguyen, H, Fehr, M, Solanka, L, Buchanan, R, Bjelonic, M, Khedekar, N, Valceschini, M, Jenelten, F, Dharmadhikari, M, Homberger, T, De Petris, P, Wellhausen, L, Kulkarni, M, Miki, T, Hirsch, S, Montenegro, M, Papachristos, C, Tresoldi, F, Carius, J, Valsecchi, G, Lee, J, Meyer, K, Wu, X, Nieto, J, Smith, A, Hutter, M, Siegwart, R, Mueller, M, Fallon, M, Alexis, K