Simultaneous plasma and wave data obtained by the DE-1 satellite are used to study a correlation between electrostatic auroral hiss emissions at several kilohertz and upward electron beams at altitudes between 2 and 4 RE near the dayside polar cusp. Among five randomly selected DE-1 passes, intense electrostatic hiss emissions at frequencies below the electron plasma frequency are found to be associated with strong upward electron beams for every pass. The frequency-time spectrum of auroral hiss near the polar cusp is sometimes characterized by a funnel shape, suggesting that the radiation is emitted from a wave source below the spacecraft. At the center of the enhanced wave region, the electron distribution function above 20 eV is characterized by two components: a hot Maxwellian component and an upward electron beam. The beams generally have a peak energy around 50 eV, a temperature around 20 eV and a density of the order of 1 cm-3. The observed distribution functions are fitted by a drifting Maxwellian function for the electron beam and isotropic Maxwellian function for the hot component. The empirically fitted plasma parameters are then used to solve the linear dispersion equation of electrostatic waves. The instability analyses indicate that whistler waves propagating the wave normal angles near a small resonance cone can be easily excited by low energy (<100 eV) upward electron beams. The frequencies of large growth rates are found below the electron plasma frequency, in agreement with the observations. On the basis of the model that cusp auroral hiss emissions are whistler waves propagating near the resonance cone, ray path studies indicate that the low altitude boundary of the wave source of cusp hiss is located at about 1 RE.