Planck pre-launch status: Design and description of the Low Frequency Instrument

Bersanelli, M; Mandolesi, N; Butler, Rc; Mennella, A; Villa, F; Aja, B; Artal, E; Artina, E; Baccigalupi, C; Balasini, M; Baldan, G; Banday, A; Bastia, P; Battaglia, P; Bernardino, T; Blackhurst, E; Boschini, L; Burigana, C; Cafagna, G; Cappellini, B; Cavaliere, F; Colombo, F; Crone, G; Cuttaia, F; D'Arcangelo, O; Danese, L; Davies, Rd; Davis, Rj; De Angelis, L; De Gasperis, Gc; De La Fuente, L; De Rosa, A; De Zotti, G; Falvella, Mc; Ferrari, F; Ferretti, R; Figini, L; Fogliani, S; Franceschet, C; Franceschi, E; Gaier, T; Garavaglia, S; Gomez, F; Gorski, K; Gregorio, A; Guzzi, P; Herreros, Jm; Hildebrandt, Sr; Hoyland, R; Hughes, N; Janssen, M; Jukkala, P; Kettle, D; Kilpia, Vh; Laaninen, M; Lapolla, Pm; Lawrence, Cr; Lawson, D; Leahy, Jp; Leonardi, R; Leutenegger, P; Levin, S; Lilje, Pb; Lowe, Sr; Lubin, Pm; Maino, D; Malaspina, M; Maris, M; Marti Canales, J; Martinez Gonzalez, E; Mediavilla, A; Meinhold, P; Miccolis, M; Morgante, G; Natoli, P; Nesti, R; Pagan, L; Paine, C; Partridge, B; Pascual, Jp; Pasian, F; Pearson, D; Pecora, M; Perrotta, F; Platania, P; Pospieszalski, M; Poutanen, T; Prina, M; Rebolo, R; Roddis, N; Rubino Martin, Ja; Salmon, Mj; Sandri, M; Seiffert, M; Silvestri, R; Simonetto, A; Sjoman, P; Smoot, Gf; Sozzi, C; Stringhetti, L; Taddei, E; Tauber, J; Terenzi, Luca; Tomasi, M; Tuovinen, J; Valenziano, L; Varis, J; Vittorio, N; Wade, La; Wilkinson, A; Winder, F; Zacchei, A; Zonca, A.