Rocket-borne measurements are made of the particle pulsation characteristics in a pulsating aurora. A train of eleven 17-s pulsations was observed in electron intensities at energies as low as 2 keV and as high as 28 KeV. During the pulsations a factor of 2 increase in the electron intensities at the few-keV range, and a factor of 3--5 increase in the intensities in the 20-keV range, were measured. Time delays in pulsations of low-energy electrons are observed; they indicate the source of particle injection to be near the equatorial plane. The electron energy spectra in pulsation maxima are characterized by higher Maxwellian temperatures than their pulsation minima counterparts. The few-keV electrons have more trapped distributions at pulsation minima than at pulsation maxima. The energetic electrons are isotropic at all times. The altitude profiles of the electron fluxes at various energies are examined, in an attempt to identify the possible existence of thin optical pulsating auroral structure; they are found to be similar to those associated with discrete auroras. Current theoretical pulsation models are discussed in light of the observations.