The temperature amplitude and phase structures of zonally propagating planetary waves are determined between 79S and 79N latitudes at the 10 and 1 mbar levels through the use of spectral analysis and complex-valued empirical orthogonal function analysis. The data are temperatures regressed from Nimbus 4 and 5 satellite infrared radiances during the solsticial seasons of 1970-1974. The structures of three westward moving normal modes and two eastward moving modes linked to instabilities near the winter stratopause are described. Waves of zonal wavenumber 4, 5, and 6 which are eastward moving in the summer Southern Hemisphere are also observed; a wave 1, 16-day period, westward moving mode commonly observed in geopotential fields is not seen here. The results concur with recent studies of traveling waves and provide estimates of average wave temperature amplitudes in the upper stratosphere.