The analysis of the magnetic field observations from Dodge satellite magnetometer data at L=6.25 RE shows dominant low-frequency waves (Pc 3 and Pc 4) in three major frequency bands: 40--35, 25--20, and 8--12 mHz. During the observation period of July--August 1968 the 25- to 20-mHz band always showed high spectral density, indicating the most dominant wave frequency. Similar results were obtained in the analysis of ground magnetometer observations from L=6.9 to 1.5 near the local time of the satellite observations. The simultaneous observations of the waves at low as well as high L values are important in wave propagation models. This pattern of observations and the polarizations of certain wave events which occurred when Dodge was close to the gound observatory are discussed in terms of contemporary theoretical models.