Electrostatic H+ cyclotron harmonic waves are often observed along the auroral field lines at altitudes of 1--3.5 RE by the Dynamics Explorer 1 satelline. A small fraction of these waves are found to have two peaks associated with each harmonic instead of one peak. The waves occur below the lower hybrid frequency and are usually relatively weak, about a factor of 4 smaller than typical electric field amplitudes of other H+ cyclotron harmonic wave events. For two events the separation between the spectral peaks is found to be proportional to the harmonic number. The double-peaked spectral signature is believed to be produced by Doppler shifts arising from the satellite velocity relative to the plasma rest frame. The wavelength and phase velocity of the harmonics can be determined by measuring the separation between the peaks. The waves were found to have wavelengths of the order of 300 m and phase velocities of the order of 150 km/s. the proportionality between the peak separation and the harmonic number indicates that the phase velocity is approximately constant, independent of harmonic number. Assuming that the phase velocity is constant, it is shown that as Δk/k increases, the double peaks merge to form a single spectral peak. For the wave events presented in this paper, Δk/k is estimated to be less than 0.1. ¿American Geophysical Union 1990