Semi-annual oscillations in Saturn's low-latitude stratospheric temperatures. by Orton, G, Yanamandra-Fisher, P, Fisher, B, Friedson, A, Parrish, P, Nelson, J, Bauermeister, A, Fletcher, L, Gezari, D, Varosi, F, Tokunaga, A, Caldwell, J, Baines, K, Hora, J, Ressler, M, Fujiyoshi, T, Fuse, T, Hagopian, H, Martin, T, Bergstralh, J, Howett, C, Hoffmann, W, Deutsch, L, Van Cleve, J, Noe, E